✔ Arduino Nano ( or any other based on 328p)
✔ 1 * 10K resistor
✔ 1 * 1K resistor
✔ 1 * npn 2n222* transistor
✔ wires, connectors
Upload code to Arduino via Arduino IDE
🔌 Black is GND
🔌 Red is +12V
🔌 Yellow wire - PG (usualy 3rd is fan output that we are going to emulate).
1️⃣ You need to connect +12V to VIN pin of Arduino, and GND to GND pin.
2️⃣ 2n222* collector should be connected to +12V (or +5v if there is no way to get 12v) through 10K resistor
3️⃣ 2n222* base should be connected to D9 through 1K resistor
4️⃣ 2n222* emitter should be connected to GND
5️⃣ Output signal will be generated between 10R resistor and collector.
