Create app.py

app.py

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+import gradio as gr
+
+def calculate_vdc(num_resistors, resistances, connection_type, target_current):
+    # Convert space-separated resistance values to floats
+    try:
+        r_list = [float(r) for r in resistances.split()]
+        if len(r_list) != num_resistors:
+            return "⚠️ Number of resistance values does not match the count!", ""
+    except:
+        return "⚠️ Invalid resistance values!", ""
+    
+    # Equivalent resistance
+    if connection_type == "Series":
+        req = sum(r_list)
+    else:
+        try:
+            req = 1 / sum([1/r for r in r_list])
+        except:
+            return "⚠️ Invalid parallel combination!", ""
+
+    # Voltage calculation
+    vdc = req * target_current
+
+    # Suggest nearest standard DC supply
+    standard_vdc_levels = [3, 5, 6, 9, 12, 15, 24, 48]
+    nearest_vdc = min(standard_vdc_levels, key=lambda x: abs(x - vdc))
+
+    result = (
+        f"Equivalent Resistance: {req:.3f} Ω\n"
+        f"Target Current: {target_current:.3f} A\n"
+        f"Required VDC: {vdc:.3f} V\n"
+    )
+
+    suggestion = f"Nearest Standard DC Voltage Source: {nearest_vdc} V"
+
+    return result, suggestion
+
+
+# ----------------------
+#   Gradio Interface
+# ----------------------
+
+with gr.Blocks(title="DC Voltage Source Selector") as demo:
+    gr.Markdown("## 🔋 DC Voltage Source Selector")
+    gr.Markdown(
+        "Enter the number of resistors, their values, and connection type.\n"
+        "The app will calculate the required **DC voltage source**."
+    )
+
+    num_resistors = gr.Number(label="Number of Resistors", value=1, precision=0)
+    resistances = gr.Textbox(
+        label="Enter Resistance Values (space-separated, in ohms)",
+        placeholder="Example: 10 20 30"
+    )
+
+    connection_type = gr.Radio(
+        ["Series", "Parallel"], 
+        label="Connection Type", 
+        value="Series"
+    )
+
+    target_current = gr.Number(
+        label="Desired Current (A)",
+        value=0.1,
+        step=0.01
+    )
+
+    output_text = gr.Textbox(label="Calculation Result")
+    suggestion = gr.Textbox(label="Recommended DC Voltage Source")
+
+    btn = gr.Button("Calculate Voltage")
+    btn.click(
+        calculate_vdc,
+        inputs=[num_resistors, resistances, connection_type, target_current],
+        outputs=[output_text, suggestion]
+    )
+
+demo.launch()