dialog listlengths 4 30 | title stringlengths 15 150 | category stringclasses 14 values | dialog_time stringdate 2016-01-21 01:59:30 2018-07-01 01:34:46 |
|---|---|---|---|
[
{
"message": "Completely new at electrical engineering. My only degree is in Comp Sci. I want to know that if I had something like a raspberry pi and a power source, how can I use them to turn on and off individual bulbs in a collection of ten without connecting a separate wire for each bulb? Rather, there woul... | How do I control ten lightbulbs individually using one wire and processor? | electronics | 2018-03-03T00:55:05.383 |
[
{
"message": "I need to place a Wifi surveillance camera near the entrance of my house where no power outlet is in that area. I pulled a wire wrapping wire (awg 30) to the target location without thinking about wire resistance. And as you all expected, it didn't able to power the webcam.The power the camera u... | A 5V @ 1A wifi surveillance camera placed 50ft away (indoor) | electronics | 2018-03-03T06:48:19.907 |
[
{
"message": "In the case where you hit a power line with your car, is it possible if you a) touch the frame of the car [(i) either one or (ii) both hands] and your body has no contact with the ground, you will not be electrocuted.Similarly, if you b) open the car door and have one foot on the ground and the ot... | Downed Power Line Scenarios | electronics | 2018-03-03T10:40:40.650 |
[
{
"message": "<a href=\"https://i.stack.imgur.com/rJIfT.jpg\" rel=\"nofollow noreferrer\"><a href=\"https://i.stack.imgur.com/9kpic.jpg\" rel=\"nofollow noreferrer\">I am confused with the above problem. It is an example problem from my workbook. I doubt how can we write 1000/s as a voltage source ?EDIT: I know... | RC Circuit Problem | electronics | 2018-03-03T19:37:03.280 |
[
{
"message": "I need to feed 12 volts into an Ethernet cable. The vendors datasheet states:<blockquote> Power Method: Passive Power over Ethernet (pairs 4, 5+; 7, 8 return)</blockquote>Does that mean I connect both the 4 and the 5 to the same 12 volts positive cable and 7 + 8 to the negative? Is this standard ... | How to get Power into a Power over Ethernet cable? | electronics | 2018-03-03T20:20:07.070 |
[
{
"message": "I have a simple but yet tricky circuit that i like to know how to approach. It is a circuit with a dc supply of 12 V and two identical resistors of 1kOhm. The circuit is constructed with both resistors connected to each end of the power supply and with both resistors end connected to ground. Is bo... | Circuit Anaylsis | electronics | 2018-03-03T21:59:18.893 |
[
{
"message": "<a href=\"https://i.stack.imgur.com/n5S2E.png\" rel=\"nofollow noreferrer\">\\$I_3=10*10^{-6}A \\$ and \\$ I_4=30*10^{-6}\\$.Then i want to calculate the \\$v_0\\$ .By V=IR , I get \\$200k*I_4\\$= -6 V. By voltage divider rule, \\$\\frac {40k}{50k}*-6V=-4.8\\ \\mathrm V\\$ .Can i understand that p... | Op-amp voltage calculation | electronics | 2018-03-04T12:05:34.653 |
[
{
"message": "<a href=\"/plugins/schematics?image=http%3a%2f%2fi.stack.imgur.com%2fG8jws.png\">simulate this circuit – Schematic created using <a href=\"https://www.circuitlab.com/\" rel=\"nofollow\">CircuitLabI have a system where i need to have a clock enable for two 74LS374 D Flips that do not already ... | NPN High side switch | electronics | 2018-03-04T15:11:40.920 |
[
{
"message": "In Xilinx Vivado IP integrator, I want to create a custom building block. The block need to be able to access the memory space (possibly external RAM) by itself.The target function of the block can be described in the following steps:I give the AXI-MM slave block two adresses:0x????_???0: a base m... | Using Memory values in Verilog / VHDL | electronics | 2018-03-04T15:28:52.853 |
[
{
"message": "I am trying to build a transceiver for a stepped-frequency radar. As a starting point, I am trying to generate my signal on NI's AWR VSS software. I am able to generate my signal but don't know what should be the step time for changing one frequency to another.I know that higher the step size long... | How to determine lock time of PLL/VCO vs frequency change? | electronics | 2018-03-04T22:04:34.440 |
[
{
"message": "I want to use grid eye AMG8833 for presence detection. Has anyone used gridEye for the same purpose? Or Can someone suggest algorithms to decide whether someone is present beneath the sensor or not ?",
"role": "user"
},
{
"message": "For what it is worth. This is a thousand words.<a h... | presence detection using Panasonic grid eye | electronics | 2018-03-05T09:26:35.143 |
[
{
"message": "I want to understand how exactly full duplex serial communication between UART of a microcontroler and PC com port actually happen ? I have used applications where a single UART( single Rx, Tx pins) is used for sending data from a GUI and at the same time receive continuous stream of data from P... | Low level details for serial communication between UART of a microcontroller and PC | electronics | 2018-03-06T02:58:08.603 |
[
{
"message": "Im in need of an application that needs to add linear phase shift to a signal similary to the one produced by a Bessel Filter, meaning constant delay, my question is: does a standard 1st order all pass filter provide a linear phase shift? if not, what circuit provides a linear phase shift similary... | Is an all-pass filter a linear phase shift filter? | electronics | 2018-03-06T04:27:14.340 |
[
{
"message": "I found a circuit online about an rf power amplifier working in the 88 to 108MHz FM spectrum. The circuit diagram is shown below<a href=\"https://i.stack.imgur.com/vC4oy.png\" rel=\"nofollow noreferrer\">I understand that an amplifier needs an inductor and a capacitor in a resonant circuit to buil... | What do the inductors L2 and L3 do in the following rf power amplifier circuit? | electronics | 2018-03-06T05:04:17.633 |
[
{
"message": "please be patient as I am not a electrician/electronic engineer. I am wanting to make a negative ion generator to attempt to make a powder coating gun, I know they are cheap but I like to build for cheaper.Now I have looked at the basics and understand it to a certain degree, using the Villard ca... | Voltage multiplier | electronics | 2018-03-06T07:44:44.713 |
[
{
"message": "Can someone please explain to me in simple terms how is it possible to have high voltage and low current and low voltage and high current and what actually does harm to human body.Here is what I don't understand:12V / 1000 Ohm = 0.012A (12mA)300V / 1000 Ohm = 0.3A (300mA)So if I go and touch 12V b... | High voltage, low current and vice versa | electronics | 2018-03-06T08:06:02.577 |
[
{
"message": "I am converting a chinese lasercutter to be controlled using a Smoothieboard. The PSU is controlled by a TTL High / Low to \"arm\" the laser as well as several safety measures.When the laser is armed, the power is controlled by a PWM signal. This PWM signal from the Smoothieboard is output at 3.3V... | Amplify PWM Signal from exactly 0-3.3V to 0-5V | electronics | 2018-03-06T09:05:29.753 |
[
{
"message": "I'm building a bench to calibrate a device that measures AC currents. As I won't build something accurate, the current will be measured with a current clamp and a multimeter (voltage mode). For the current load, I first tried a diode bridge with big capacitors and after it, a DC current load (volt... | Building a numeric potentiometer for AC current | electronics | 2018-03-06T09:16:47.997 |
[
{
"message": "I'm currently working on a device which connects a SD card to a FPGA.I have to find out how much time the SD card takes to switch between the reading and writing modes. I have already searched the specs of the <a href=\"https://www.sdcard.org/downloads/pls/index.html\" rel=\"nofollow noreferrer\">... | Timing the change mode (Read/Write) on SD card | electronics | 2018-03-06T10:19:23.640 |
[
{
"message": "I'm currently working on my very first SMT PCB, and would like to connect a number of PCBs to the main PCB using spring loaded pogo pins like these:<br><a href=\"http://uk.farnell.com/harwin/p19-2221/probe-convex-1-90mm-pitch/dp/9960171\" rel=\"nofollow noreferrer\">http://uk.farnell.com/harwin/p1... | Implementing a good connection for pogo pins in eagle | electronics | 2018-03-06T14:55:11.457 |
[
{
"message": "I will need to connect several PCBs within a single enclosure for the project I am working on (They are split to reduce cost should there be a manufacturing error).I need to connect an I2C Bus, 5V , an analogue and 3 digital signals (and importantly, the ground plane) from each 'slave' board to th... | How should I connect my PCBs? | electronics | 2018-03-06T16:25:54.227 |
[
{
"message": "I am trying to run <a href=\"https://www.adafruit.com/product/324\" rel=\"nofollow noreferrer\">this stepper motor (XY42STH34-0354A), but I am encountering two odd issues with its performance: slowing of the motor in 1/32 microstep mode, and a \"soft cap\" of the RPM where the speed of the motor b... | Stepper motor voltage / resistance per phase | electronics | 2018-03-06T19:38:59.930 |
[
{
"message": "In <a href=\"https://www.mouser.com/pdfDocs/MeanWell_medical_app_note_BF.pdf\" rel=\"nofollow noreferrer\">this document it says \"According to IEC 60601-1, the leakage current limits are provided in Table 1.\" If the leakage current is due to Y capacitor, the load R and the the parasitic capacita... | At what load is the leakage current quantified for a power supply? | electronics | 2018-03-06T19:49:32.803 |
[
{
"message": "I have some S8050 transistors and was looking for the stats of them in the datasheet. I found some strange values for the Ib/Ic relation:<a href=\"https://i.stack.imgur.com/xh8iw.jpg\" rel=\"nofollow noreferrer\">Shouldn't the unit on the y-axis be A instead of mA? The datasheet of all S8050 subty... | S8050 datasheet typo? | electronics | 2018-03-06T22:24:37.630 |
[
{
"message": "INTRODUCTION: I'm aiming to design an Ethernet connected system as a hobby ( ie. plenty of time but not wishing to spend much ). My design constraints would ideally be sticking to a 2 layer 100mm x 100mm PCB with 0.3mm min holes and 0.15mm min track/clearance, up to 0.6mm thin total stackup. The c... | Ethernet RMII on two layer PCB | electronics | 2018-03-06T22:25:11.137 |
[
{
"message": "Requesting some input on this topic which has already been discussed (partially for my requirement) here:<a href=\"https://electronics.stackexchange.com/questions/202788/negative-to-positive-voltage-converter\">Negative to Positive Voltage ConverterI also have a positive-only display and I need to... | Converting negative DC voltage to positive equivalent | electronics | 2018-03-06T23:26:15.437 |
[
{
"message": "I am thinking of making my own UHF tracking transmitters for a wildlife study. Could I just connect a low power microcontroller to the Vcc part of this circuit <a href=\"http://www.instructables.com/id/Tiny-UHF-Tracker-Transmitter/\" rel=\"nofollow noreferrer\">http://www.instructables.com/id/Tiny... | could I just add a microcontroller or timer to this transmitter circuit to turn it on and off so that it lasts longer? | electronics | 2018-03-07T02:28:22.727 |
[
{
"message": "Please anyone help me to clarify different btw Active cable, Passive cable, EMCA.Their definition seem difficult to understand.Additional, in USB-TypeC Specification from usb.org:<pre><code>Active cable : An Electronically Marked Cable with additional electronics tocondition the data path signals... | Type-C Cable : Different between Active cable, Passive Cable, EMCA | electronics | 2018-03-07T02:46:22.250 |
[
{
"message": "What is the difference between reading the FIFO registers(FIFO_DATA_OUT_L,FIFO_DATA_OUT_H) and Sensor output registers(OUTX_L_XL to OUTZ_H_XL) both are same?which is recommended to get the raw data from the sensor",
"role": "user"
},
{
"message": "Reading the sensor output registers (O... | Reading FIFO in LSM6DS3 | electronics | 2018-03-07T07:38:09.870 |
[
{
"message": "This image below is from this <a href=\"https://www.ti.com/seclit/ml/slup113/slup113.pdf\" rel=\"nofollow noreferrer\">TI cookbook. Please look at the red box. Question: why large signal can make a conditionally stable system unstable?<a href=\"https://i.stack.imgur.com/Yqg1Z.jpg\" rel=\"nofollow ... | why large signal can make a conditionally stable system unstable? | electronics | 2018-03-07T07:59:37.857 |
[
{
"message": "Would electrical reactance and physical inertia be appropriate general analogies? Each is a resistance to change. I've thought of trying to construct a table of similarities between disciplines to speed and clarify understandings as courses seemed to converge on these evaluations.",
"role": ... | Electrical reactance : physical inertia analogy | electronics | 2018-03-07T09:47:28.690 |
[
{
"message": "I came across the graph below in <a href=\"https://www.onsemi.com/pub/Collateral/2N3903-D.PDF\" rel=\"nofollow noreferrer\">ONSemi's 2N3904 datasheet that depicts the DC current gain.I don't understand what \"normalized\" means. I've read other explanations by Googling, but found all of them to be... | What does "normalized" mean in this datasheet? | electronics | 2018-03-07T11:11:37.163 |
[
{
"message": "Sorry if my question is too naive, I'm new to this. I am trying to design a controlled current source for currents up to about 1A (diagram below). My requirement is that the current depend only on the value of a single voltage source and a single resistance (which I can precisely choose). <a href=... | Extend linearity range of this opamp circuit | electronics | 2018-03-07T14:51:06.840 |
[
{
"message": "I'm trying to embed a u-blox neo6m gps module to an stm32 controlled board. I'm planning to connect the module to an SMA connector and use a 50ohm antenna.The datasheet of the neo6m states that the impedance of the connection between the module and the antenna must be 50ohm. The datasheet only con... | Impedance matching: L-network or micro strips? | electronics | 2018-03-07T18:27:42.427 |
[
{
"message": "I'm currently trying to figure out the best way to make use of my gas gauge LTC2943-1 in conjunction with my pack of NiMH batteries. I am aware that voltage alone is not a sufficient measure of the SoC of a battery, so I am trying to make use of the gauge's coulomb counting ability. Unfortunately ... | NiMH Batteries and Fuel Gauge | electronics | 2018-03-07T19:00:45.687 |
[
{
"message": "I have this relay module : <a href=\"https://www.amazon.co.uk/gp/product/B06XKQQXKW/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1\" rel=\"nofollow noreferrer\">https://www.amazon.co.uk/gp/product/B06XKQQXKW/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1I want to drive the 8 control pins (drivin... | What is a good circuit design to drive this relay safely from an ESP32? | electronics | 2018-03-07T20:29:19.450 |
[
{
"message": "I have designed this audio switch. 1 out of 4 TRRS inputs is selected.<a href=\"https://i.stack.imgur.com/jWWf0.png\" rel=\"nofollow noreferrer\">I am testing it but it does nothing.I press the switch to switch the next channel and nothing works.The idea here is:the 555 debounces the key and a pul... | Multiplexer not switching any audio input | electronics | 2018-03-08T00:07:59.087 |
[
{
"message": "<blockquote> If the conductor 'CD' rotates in clockwise direction in the figure, voltage will be induced on it. What will be the polarity of the voltage on terminal of the conductor 'CD' when the conductor rotates in clockwise direction according to the right hand rule.</blockquote>If the conduct... | Right hand rule for clockwise and counter clockwise direction | electronics | 2018-03-08T08:42:03.130 |
[
{
"message": "I'm trying to understand the transfer function of the <a href=\"https://en.wikipedia.org/wiki/Sallen%E2%80%93Key_topology#Application:_bandpass_filter\" rel=\"nofollow noreferrer\">band pass sallen key filter, which looks like:<a href=\"https://i.stack.imgur.com/yCFvt.png\" rel=\"nofollow noreferr... | Analysing a band pass sallen key filter | electronics | 2018-03-08T10:10:59.927 |
[
{
"message": "The theory says that the current return path at high frequency is on the reference plane right under(or above) the signal trace.I know it is true and I have always assumed it was, but I would like to understand it properly.My trouble is about it can be power or gnd plane for the reference plane.If... | Real current return path | electronics | 2018-03-08T11:54:45.183 |
[
{
"message": "Would it be possible to multiplex video signals transmitted from multiple cameras to a MCU? For example, can 4 OV9655 cameras modules communicate with a STM32f4 MCU? OV9655 is a CMOS image sensor and generates 10-bits parallel video data. Other than the parallel data signals the sensor transmits 3... | multiplexing OV7670 video signals | electronics | 2018-03-08T14:20:28.820 |
[
{
"message": "I am tasked with running a loudspeaker to a remote building. The total run length is around 275 feet, with the outdoor portion being around 165 feet. The cable is Cat5e 24awg unshielded, silicone filled cable installed in a 2-inch PVC conduit buried 6-12 inches underground.<br>The loudspeaker amp... | Lightning protection for underground loudspeaker wires | electronics | 2018-03-08T16:08:43.840 |
[
{
"message": "<a href=\"https://i.stack.imgur.com/v3VAK.png\" rel=\"nofollow noreferrer\"><a href=\"https://i.stack.imgur.com/XOSVY.png\" rel=\"nofollow noreferrer\">I calculated R thevenin to be 5.322 ohms, but I don't know how to get a voltage after this step. I tried to use node voltage equations since V the... | Finding voltage thevenin | electronics | 2018-03-08T19:06:34.760 |
[
{
"message": "I am working on a project where I am needing to power 13-20 LEDs of varying sizes and types from a single battery / battery pack. I am generally a novice when it comes to circuitry, however, I have successfully made similar simple set ups before using resistors and a fixed 12v power supply and th... | Powering several LEDs from Batteries | electronics | 2018-03-08T19:53:48.050 |
[
{
"message": "I have designed a PCB which has ATMega328P and one DS1307, along with other sensors on the I2C line. The design is as follows : <a href=\"https://i.stack.imgur.com/hwK7h.png\" rel=\"nofollow noreferrer\">Y2 is 32.768KHz crystal, and BT1 is a standard 2032 3v3 coin cell. I am able to easily program... | DS1307 : Long term effects, time gets corrupted | electronics | 2018-03-09T15:24:20.483 |
[
{
"message": "I am new to this information portal!<br/> <br/>However, I have question regarding open drain. <br/><br/>I read that, in open drain mode, neither of the devices (slave/master) are allowed to drive the data line HIGH, they can only drive the line low, otherwise there can be cases where it may damage... | Open Drain while transmitting data with port direction output | electronics | 2018-03-10T07:18:26.823 |
[
{
"message": "I bought an EL lamp driver IC from Microchip, the <a href=\"http://ww1.microchip.com/downloads/en/DeviceDoc/HV830%20E072913.pdf\" rel=\"nofollow noreferrer\">HV830, but I was not able to find the exact inductor indicated in the test circuit shown below, the Murata LQH4N221K04. I found another 220... | inductor DC resistance too low for el driver IC: can I still make this circuit work? | electronics | 2018-03-12T00:56:22.137 |
[
{
"message": "I'm planning on generating a negative voltage for a circuit i'm working on, and want to use an inverting buck topology to do this. With the application being battery powered, my primary concern is efficiency.Whilst looking at the many options available, I've come across parts that are marketed spe... | What exactly is the point of specifically 'inverting' buck/boost converters? | electronics | 2018-03-12T06:06:27.243 |
[
{
"message": "I have a vehicle that I only want to read CAN bus messages from. But I also have to send out messages on the same bus, but the vehicle may not receive these messages.Is it possible to block the flow in one direction - so that I can only read from the vehicle, but the vehicle won't receive the mess... | Blocking messages in one direction on a CAN bus | electronics | 2018-03-12T07:58:37.277 |
[
{
"message": "I am trying to build a sine wave oscillator using opamp, but i am getting weird output. Need help getting pure sine wave output.Circuit Schematic:<a href=\"https://i.stack.imgur.com/uYeJP.png\" rel=\"nofollow noreferrer\">Circuit Description:The circuit is similar to regular 3 stage buffered RC ph... | op-amp oscillators weird output | electronics | 2018-03-12T10:20:08.043 |
[
{
"message": "I have a S8050 with an Ib/Ic current gain of about 100. The diagram for the current gain in the datasheet shows Ic being 330mA at Ib 2mA for this transistor. In my circuit I drive a 3.3-5V motor with the transistor, both are fed from the same 4V source. The motor takes about 65mA when directly con... | S8050 transistor currents not like in the datasheet | electronics | 2018-03-12T13:05:03.807 |
[
{
"message": "I have designed the following optoisolator for SWD interfacing with an STM32 device and J-LINK programmer:This is the generic schematic:<a href=\"https://i.stack.imgur.com/MGcoy.png\" rel=\"nofollow noreferrer\">And this is a single optoisolator schematic:<a href=\"https://i.stack.imgur.com/rfBYc.... | SWD optoisolation problem | electronics | 2018-03-12T14:48:55.877 |
[
{
"message": "I am building my first simple buck converter, stepping down 12 V to 5 V and driving a small load of 5 Ω - 10 Ω. Something like the following:<a href=\"https://i.stack.imgur.com/Hiaaz.jpg\" rel=\"nofollow noreferrer\">or:<a href=\"https://i.stack.imgur.com/yNJ1P.png\" rel=\"nofollow noreferrer\">Th... | Choosing the correct Gate Driver for a MOSFET in a DC-to-DC Converter | electronics | 2018-03-12T16:17:34.300 |
[
{
"message": "i am running a bldc motor Infineon TLE9879 chip. Now i want to measure the current flowing through the motor. so i use the current sense amplifier where the motor current is converted to a voltage by means of a shunt resistor RSH(0.005 ohm).I want to measure current from 0.1amp to 3Amps which give... | Current sense amplifier working principle | electronics | 2018-03-12T19:13:25.570 |
[
{
"message": "I need to design a DP8T microwave switch for a microwave imaging senior design project. The frequency range is 2 to 6 GHz. I need to switch between 8 antennas and a 2 port VNA. So each antenna transmitting and receive one at a time. I'd imagine this is a common problem in RF engineering, but I can... | How can I design a double pole eight throw microwave (2-6 GHz) switch? | electronics | 2018-03-12T19:13:40.517 |
[
{
"message": "Im trying to use my PT100 with an Arduino-based PLC from Industrial Shields, which is basically an Arduino Mega encased in a plastic container. Im using a 250Ω resistor, actually 237Ω resistor between Analog and Ground.<br>The pt100 range is -200 to 600C & the transmitter according to NFC sca... | How to calibrate PT100 with Arduino | electronics | 2018-03-13T00:07:51.390 |
[
{
"message": "The classic diagram looks like this with coils just positioned sideways to the rotationI'm not sure if this is just a schematic or it indicates the actual structure. However I assume the actual structure is more like this This makes more sense in terms of lining up the motor with more precision, a... | Inner structure of a bipolar stepper motor? | electronics | 2018-03-13T04:09:46.117 |
[
{
"message": "I have started learning transistors few weeks ago and I hit a roadblock (again). I have been following this tutorial on Sparkfun -<a href=\"https://learn.sparkfun.com/tutorials/transistors\" rel=\"noreferrer\">https://learn.sparkfun.com/tutorials/transistors<a href=\"https://i.stack.imgur.com/Ntoz... | Astable multivibrator using transistor | electronics | 2018-03-13T04:27:52.887 |
[
{
"message": "Regarding <a href=\"http://www.ni.com/white-paper/3344/en/\" rel=\"nofollow noreferrer\">this paper, I first tried to wire single-ended floating sources to a diff ended data acquisition board. But because of some power supply related issues and not wanting to make another interface for bias resis... | Confusion with grounding floating sources to be used with a differential ended data acquisition board | electronics | 2018-03-13T10:43:27.223 |
[
{
"message": "I am wondering how to interface with this bus switch from a ESP32. I need to drive OE1 and OE2 LOW at 5v , see <a href=\"http://www.farnell.com/datasheets/2288300.pdf?_ga=2.150325878.1322304222.1520888675-1694002906.1520888675\" rel=\"nofollow noreferrer\">datasheetI know that I can only drive up ... | How best to interface with this bus switch from an ESP32 | electronics | 2018-03-13T12:28:02.137 |
[
{
"message": "i'm trying to design a circuit that will control two biopolar stepper motors to scan the temperature of a room.<a href=\"https://i.stack.imgur.com/J0iVb.png\" rel=\"nofollow noreferrer\">The mechanism will look something similar to this (minus the gears, and much lighter) but a small IR sensor rat... | Conserving battery life in a stepper motor circuit | electronics | 2018-03-13T15:53:05.263 |
[
{
"message": "i'm trying to design a circuit that will control two biopolar stepper motors to scan the temperature of a room.<a href=\"https://i.stack.imgur.com/J0iVb.png\" rel=\"nofollow noreferrer\">The mechanism will look something similar to this (minus the gears, and much lighter) but a small IR sensor rat... | Conserving battery life in a stepper motor circuit | electronics | 2018-03-13T15:53:05.263 |
[
{
"message": "<a href=\"https://i.stack.imgur.com/pmVla.jpg\" rel=\"nofollow noreferrer\">I am confused with the above problem. Should I take a new state variable for rightmost capacitor or 3 variables are sufficient?Please help me in writing the state space equations.",
"role": "user"
},
{
"message... | State Model Representation of RLC network | electronics | 2018-03-13T17:34:38.717 |
[
{
"message": "I have made a bench power supply that can erogate 0-30 volt and 0-2 A.Now, how can i protect my bench power supply from reversed voltage applied to it's output? Typical p or n mosfet circuit dosent work in this circumstance-I am thinking to create a separate circuit with a separate floating ground... | Power supply 0-30 volt reverse voltage protection | electronics | 2018-03-13T20:47:50.930 |
[
{
"message": "I'm trying to understand how the CDI (capacitor discharge ignition) works and what are its advantages over inductor-based systems. The disadvantage of the inductor-based system is apparently that it takes a relatively long time to build up the current through the primary when the points are closed... | CDI ignition: Isn't the coil charged anyway? | electronics | 2018-03-13T20:54:06.827 |
[
{
"message": "I have an HIH6130 temperature and humidity sensor inside a plastic enclosure with a Particle Photon.When it takes reading while inside the enclosure, the readings are ~ 2 degrees too high, vs outside the enclosure.Outside of putting a fan or a heat sink on it, any other ideas on how to reduce the ... | Temperature sensor reads higher inside enclosure | electronics | 2018-03-14T01:32:19.113 |
[
{
"message": "I am trying to analyse the following Armstrong oscillator circuit from <a href=\"http://users.skynet.be/BillsPage/TeslaPage.html#Armstrong\" rel=\"nofollow noreferrer\">HF Tesla coil experiments. I am particularly interested in this topology because of the class E operation and the high efficiency... | Analysis of an Armstrong oscillator circuit | electronics | 2018-03-14T08:12:08.217 |
[
{
"message": "I see in buck converter examples that they have fixed/regulated input voltage and a fixed output.I'm planning to build or buy a for example 9V to 5V buck converter but the 9V side will be composed of parallel batteries. This means the input voltage will not be regulated. And since the battery volt... | A question about DC-DC converter and buck converter | electronics | 2018-03-14T09:56:38.357 |
[
{
"message": "This is an RFI filter from a 12V automotive DC motor. This motor design is over 20 years old and currently in \"service\" production. We just learned that the capacitor we're using is now in short supply and we need a replacement. Unfortunately, we can't find a comparable capacitor that also sa... | Can someone explain how this RFI filter works? | electronics | 2018-03-14T14:21:03.363 |
[
{
"message": "Well, I've the following third order filter circuit:<a href=\"/plugins/schematics?image=http%3a%2f%2fi.stack.imgur.com%2fWiyrd.png\">simulate this circuit – Schematic created using <a href=\"https://www.circuitlab.com/\" rel=\"nofollow\">CircuitLabAnd I know that the transfer function looks ... | Finding the transfer function of a opamp filter circuit | electronics | 2018-03-14T20:19:57.667 |
[
{
"message": "What happens if one of the poles of the primary winding of a transformer is connected to one of the poles of the secondary winding of said transformer, such that electricityleaves the power source,enters one of the poles of the primary winding,passes through the primary winding,exits the primary w... | What happens if the windings of a transformer are connected to each other? | electronics | 2018-03-15T00:43:22.900 |
[
{
"message": "In buck converter how should we assign a value to capacitor and inductor for reducing 12 voltage to the 9 voltage or any other voltage to any other.",
"role": "user"
},
{
"message": "Here's a starter for a synchronous buck converter: -<a href=\"https://i.stack.imgur.com/N46T8.png\" rel... | problems related to buck converter/voltage regulator | electronics | 2018-03-15T09:39:19.837 |
[
{
"message": "I’m new to electronics and am trying to ground myself in basic concepts. On my test circuit board I have a 5.08V power supply, a 200 ohm resistor and a 1.5V incandescent lamp in series. The voltage drop over the resistor measures 5.05V and the voltage drop over the lamp measures .02V. The curre... | Resistor and Incandescent Lamp in Series | electronics | 2018-03-15T15:13:24.040 |
[
{
"message": "Replacing electrolytics in a 30+ year old Ampeg BT-15 bass amplifier. The PS filter caps are \\$ 2500 \\mu F/80V\\$ which are rare to be found; I know that 3300/100 would be okay for the filter. There's also a \\$0.1 \\mu F\\$ in parallel which I <a href=\"https://electronics.stackexchange.com/que... | Capacitor Value in Bass amplifier to speaker circuit | electronics | 2018-03-15T20:48:04.287 |
[
{
"message": "Why is the Cumulative Compound DC Motor called Cumulative and why is the Differential called Differential?",
"role": "user"
},
{
"message": "<blockquote> I want to ask, why is the Cumulative Compound DC Motor called Cumulative and why is the Differential called Differential?</blockqu... | Why is the naming meaning of Compound DC Motors? | electronics | 2018-03-16T07:18:40.527 |
[
{
"message": "As an example, NPN Silicon Power Transistor TIP31 VCEO (Collector-Emitter Voltage) is rated at 40Vdc Maximum. I have many unknown transistors for which I would need to measure the VCEO. Many are power transistors, many are low power.<br>Is there a safe way to measure VCEO (or VCES) of a transistor... | How to safely measure VCEO or VCES of a transistor? | electronics | 2018-03-16T22:51:35.380 |
[
{
"message": "Hello good day I been trying to build split keyboard using 2 pro micro.I'd been following let's split keyboard using qmk firmware.And the connection diagram of the i2c is this <a href=\"https://i.stack.imgur.com/U6EuS.png\" rel=\"nofollow noreferrer\">When doing it on the breadboard everything is ... | i2c interference on coiled wire | electronics | 2018-03-17T09:57:05.093 |
[
{
"message": "I am trying to bias an AC signal and to the best of my knowledge I've come up with this circuit. please be easy on me am just getting used to the concept/terms of sampling and biasing.I am trying to get the slightest variation on of the AC signal and when simulating on LTSpice i can see a differen... | Biasing an AC signal for sampling - detect minor changes via Arduino | electronics | 2018-03-17T10:22:48.027 |
[
{
"message": "I used the following circuit to power and measure my pressure transmitter (4-20ma) sensor and the microcontroller, when the charger and battery are connected at the same time or when i disconnect the battery i get a fluctuating readings from the connected ADC (Arduino or Raspberrypi), i only get a... | Fluctuating ADC readings upon changing power source | electronics | 2018-03-17T19:48:38.667 |
[
{
"message": "<blockquote> <a href=\"https://i.stack.imgur.com/jfymg.png\" rel=\"nofollow noreferrer\"> When VT is under on-state, this function is set up: $$L\\frac{di_d}{dt} + Ri_d = \\sqrt{2}U_2\\sin(\\omega t) \\quad\\quad\\quad\\quad (1-1)$$ </blockquote>I can't solve this function :(<blockquo... | How to solve this differential equation corresponding to the RL circuit? | electronics | 2018-03-18T11:19:06.813 |
[
{
"message": "I have some problem with my nixie project.1 - my mc34063 boost converter have poor performance. While i use active pull down D3 and Q2 for driving my mosfet then its enough for only one nixie tube (z566m - ~2-3mA). But when i remove D3,Q2 and use 330ohm for R12 then efficient increase but for only... | mc34063 boost converter - low performance and noise on avr interrupt | electronics | 2018-03-18T13:43:39.460 |
[
{
"message": "In a big simplification of my circuit, will be a situation that capacitor will have more voltage than the main battery. And thus, need a diode protection.In the current simulation with multsim, this is simple ignored OR I maybe wrongly simulating. My leader said \"until capacitor's voltage is high... | Theory behind parallel battery with diode | electronics | 2018-03-18T21:04:15.303 |
[
{
"message": "The audio amplifier that I am referring to here consists of three stages. Among others, the amplifier also includes negative feedback (NFB) that is made of two passive resistors.<a href=\"https://i.stack.imgur.com/7kZVL.jpg\" rel=\"noreferrer\">From the base of TR3 to ground, there is a NFB's resi... | Function of Specific Capacitor in Audio Amplifier's Negative Feedback | electronics | 2018-03-18T21:40:42.083 |
[
{
"message": "I know that we can generate all possible patterns using LFSR sequences but this will waste memory as we will have to store pattern to do error checking and storing all from 0 to 2^(n-1) will require huge memory.So instead of that I want some specific test patterns on which my trans receiver will b... | Test patterns for testing high speed trans receivers of fpga | electronics | 2018-03-19T06:51:31.060 |
[
{
"message": "I designed a unity gain low pass Sallen key filter with equal resistor values of 10k and capacitors of 8nF. The cut-off frequency to my knowledge at the -3dB point is defined as:\\$f=\\frac{1}{2\\pi\\sqrt{R1R2C1C2}}\\$Upon simulation the cut-off designed for, which is 2kHz is at the -6dB point. Is... | Sallen Key Cut-off Frequency | electronics | 2018-03-19T14:33:22.703 |
[
{
"message": "I was reading about full-wave rectifiers and came across the schematics below which the capacitor C can smooth its voltage, but I didn't understand one case:We know that when the rectifier's voltage begins to falling from its peak, the cap C starts to send its charge to load. Where does the fallin... | Smoothing a Full-Wave rectifier voltage | electronics | 2018-03-19T15:08:58.623 |
[
{
"message": "I was reading about full-wave rectifiers and came across the schematics below which the capacitor C can smooth its voltage, but I didn't understand one case:We know that when the rectifier's voltage begins to falling from its peak, the cap C starts to send its charge to load. Where does the fallin... | Smoothing a Full-Wave rectifier voltage | electronics | 2018-03-19T15:08:58.623 |
[
{
"message": "I have 2-switch forward converter operating at 83khz frequency.Load current must be 10Amaximum D=0.5I2=Iload*sqrt(D)I2=7.1Atransformer turns ratio is 2:1, so I1=3.55AThe voltage applied to primary is 300V (220*sqrt2)results in value ner 300V.I have ETD59 core.lets calculate E per turn:Assume that ... | transformer magnetizing inductance vs magnetizing current | electronics | 2018-03-19T15:35:27.347 |
[
{
"message": ";)I want to use an amplifier circuit powered by a +/-15V supply (DC-DC converter IC with one or two Watts) to interface an ADC. I want to use clamping diodes to prevent the ADC input from leaving the voltage range 0 ... 3.3V. For that purpose I need an additional 3.3V rail generated by a supply th... | Supply for sinking current | electronics | 2018-03-19T17:37:13.647 |
[
{
"message": "It has been suggested that one of the reasons typical RISC CPUs stop at 32 architectural integer registers, despite a 32-bit instruction having enough spare bits to specify 64, is that a larger register bank takes more time to access, which would impact clock speed.However, modern CPUs typically h... | CPU register count and access time | electronics | 2018-03-19T19:36:32.140 |
[
{
"message": "Reading the <a href=\"https://www.diodes.com/assets/Datasheets/AZ1117E.pdf\" rel=\"nofollow noreferrer\">datasheet for an AZ1117E adjustable LDO voltage regulator capable of supplying 1A, I noticed the following recommendation, which I don't understand:<blockquote> \"Close to the OUTPUT pin, it i... | Why should small capacitors be placed far away from the 'output' pin on a medium-sized LDO? | electronics | 2018-03-19T19:56:40.003 |
[
{
"message": "I'm designing a high speed circuit (MIPI-DSI) so I have to carefully layout the tracks. Correct track impedance is the first point usually made in various online sources I've found on the subject, so I tried to get the microstrip impedance calculator to get as close the desired 100 Ohm. For budget... | differential pair impedance and length matching | electronics | 2018-03-19T20:27:31.670 |
[
{
"message": "PrefaceHello! I'm trying to determine what type of transistor I need in order to pulse an LED strip I have. I have attached a simplified schematic (omitting resistors) as a visual aid to show basic intended operation. (I have very little knowledge about schematic creation, so I apologize—especiall... | Which type of transistor for pulsing LED strip? | electronics | 2018-03-20T00:31:10.723 |
[
{
"message": "PrefaceHello! I'm trying to determine what type of transistor I need in order to pulse an LED strip I have. I have attached a simplified schematic (omitting resistors) as a visual aid to show basic intended operation. (I have very little knowledge about schematic creation, so I apologize—especiall... | Which type of transistor for pulsing LED strip? | electronics | 2018-03-20T00:31:10.723 |
[
{
"message": "Question on use of clock in SDC style IO delay constraintsThe intention of this write up is to cast some clarity on how an FPGA IO interface has to be constrained. As a preamble the two timing constraints which can be used for constraining an FPGA IO interface are: set_input_delayUsage: set_input... | Use of clock in SDC style IO constraints for FPGAs | electronics | 2018-03-20T08:01:03.783 |
[
{
"message": "Below is a very simplistic view of differential ended inputs of a data-acquisition channel's inAmp which measures a floating battery voltage V. To make concepts and explanations simpler I use two resistors to mimic the inAmp:<a href=\"https://i.stack.imgur.com/qSQNy.png\" rel=\"nofollow noreferrer... | How do non-flowing common mode or bias currents cause common mode range to exceed/float? | electronics | 2018-03-20T11:33:13.903 |
[
{
"message": "This is somewhat related to my <a href=\"https://electronics.stackexchange.com/questions/361818/clamp-biasing-at-jfet-gate-in-rf-circuits\">previous question regarding why I wasn't seeing a clamp biasing effect with my JFET Vackar oscillator. I think I figured it out and I'm wondering if you guys... | Measuring Vackar Oscillator Output Amplitude and High Frequency Effects | electronics | 2018-03-20T14:14:54.397 |
[
{
"message": "I bought this odd servo motor called the <a href=\"http://www.feetechrc.com/product/continuous-rotation-servo/two-working-mode-digital-programmable-metal-gears-servo-fr5311m/\" rel=\"nofollow noreferrer\">FR 5311M from FeeTech, which is advertised as a programmable servo motor which can switch fro... | FR 5311M Programmable servo? | electronics | 2018-03-20T20:51:46.033 |
[
{
"message": "Input 24 V, output > 100 V.I have looked at switching controller ICs on Mouser.com but for my input voltage they are designed only to output 50 V. <a href=\"https://www.mouser.com/ProductDetail/Texas-Instruments/TL5001AIP?qs=NLW4NjXEBS7rMvLxEkq2ag%3D%3D\" rel=\"nofollow noreferrer\">Like this TI T... | How to control high output voltage boost converter | electronics | 2018-03-21T07:30:37.107 |
[
{
"message": "Input 24 V, output > 100 V.I have looked at switching controller ICs on Mouser.com but for my input voltage they are designed only to output 50 V. <a href=\"https://www.mouser.com/ProductDetail/Texas-Instruments/TL5001AIP?qs=NLW4NjXEBS7rMvLxEkq2ag%3D%3D\" rel=\"nofollow noreferrer\">Like this TI T... | How to control high output voltage boost converter | electronics | 2018-03-21T07:30:37.107 |
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