📐 Core Electrical Parameters (enter any two)

Voltage (V)

Current (I)

Resistance (R)

Power (P)

V = I × R | P = V × I

Enter any two parameters to automatically derive values and get engineering insights.

⚡ Dynamic Circuit Simulation Current Particles | Thermal Effect | LED Brightness

🔬 Engineering Simulation Tools (Dynamic Diagrams)

Recommended resistor: -- Ω , Power: -- W

* Series resistor with 5V supply, dynamic current path visualization

Drop: -- V , Power loss: -- W

* Dynamic illustration of voltage difference across cable ends

Current draw: -- A

* Ammeter-style gauge based on power and voltage

Max current: -- A

* Color indicates current density / thermal effect (IPC-2221 formula)

📘 Engineering Knowledge Base · Design Guidelines

Blue/White LED Vf≈3V, Red≈2V. Resistor = (5-Vf)/If, ensure power rating.

NEC recommends feeder drop <3%. Copper resistivity 0.0175 Ω·mm²/m, round-trip length matters.

Using P=U·I, quickly evaluate battery life or power supply capacity, consider peak current.

1oz copper, 1mm width ~1-2A (10°C rise), derate for inner layers.

⚡ Electrical Engineer Toolkit