Chapter 7: Microcontroller Interrupts and Timers
Figure 23: Opto Interrupt Switch - H21A1
Figure 24: Opto Interrupter Glued on Motor Base
- Optoisolator pin 2 to a 200 Ohm resistor
Wiring:
- Optoisolator pin 1 to +3v
Chapter 7: Microcontroller Interrupts and Timers
Wiring: