Hardware


What you need...
R1, R2,  R3 - 1KOhm
TR1, TR2 - 2N2222 (or simmilar NPN)
D1, D2 - 1N4004
RLY1, RLY2 - 5V
SW1 - NC Door Contact

What you might want...
DIY Shield from adafruit
Terminal strips for door contact and relay connections


TR1, TR2 - 2N2222 (or simmilar NPN)
Comments