![OcioDual 20x 2N2222A Transistor NPN TO 92 Transistor di 40 V 800MA 300 MHZ Progetti Arduino Raspberry Pi 2N2222 0.8A 0.8A 800mA UN|Circuiti integrati| - AliExpress OcioDual 20x 2N2222A Transistor NPN TO 92 Transistor di 40 V 800MA 300 MHZ Progetti Arduino Raspberry Pi 2N2222 0.8A 0.8A 800mA UN|Circuiti integrati| - AliExpress](https://ae01.alicdn.com/kf/S5aa533477b524023bb52d96abdc87714C/OcioDual-20x-2N2222A-Transistor-NPN-TO-92-Transistor-di-40-V-800MA-300-MHZ-Progetti-Arduino.jpg_Q90.jpg_.webp)
OcioDual 20x 2N2222A Transistor NPN TO 92 Transistor di 40 V 800MA 300 MHZ Progetti Arduino Raspberry Pi 2N2222 0.8A 0.8A 800mA UN|Circuiti integrati| - AliExpress
![Switching a cooling fan on and off through NPN transistor connected to Arduino - General Electronics - Arduino Forum Switching a cooling fan on and off through NPN transistor connected to Arduino - General Electronics - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/0/3/4/0341a076824ab1f7b9e57aa3b62643ea14e2828a.png)
Switching a cooling fan on and off through NPN transistor connected to Arduino - General Electronics - Arduino Forum
![Switching voltage on/off from a 9v battery using a 2n2222A transistor and an arduino - Electrical Engineering Stack Exchange Switching voltage on/off from a 9v battery using a 2n2222A transistor and an arduino - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/7JdU3l.png)