Hi friends, I am making a burglar alarm system for my high school project. It uses a PIR sensor, a piezo buzzer, and an LED. I made the configuration on Tinkercad. However, I have a 9V battery and a MPS2 222 AAAA transistor instead of the recommended BC 547 one for these kinds of projects. I wanted to know if I can still use the MPS2 transistor with a 9V battery and what will be the recommended resistance for the circuit?
2 posts were merged into an existing topic: NEED HELP- Burglar Alarm System