Pick your brain
Choose Arduino Uno for C++ or NodeMCU for MicroPython and Wi-Fi experiments.
No scary schematicsFour tiny moves.
Four tiny moves.
One working circuit.
Electricity only needs a complete path. Follow the colored cards from left to right and you are ready to build.
Open the starter circuitMake a path
Signal pin goes to a resistor, then the LED long leg. The short leg returns to GND.
Keep it comfy
A 220 Ω resistor limits current to about 14 mA with a 5 V board and red LED.
Run the idea
Pick sample code, edit it if you like, and press Run Code to see the circuit react.