Hi all,
I've built a circuit which is a heat controlled stepper motor. It was all working fine but when the motor was off it still used some current. To stop this I used a 4081 chip to And the data latch outputs with my Schmitt trigger output as shown below. (I've used two 4013 chips for my data latches).
Trouble is the circuit doesn't work and seems lifeless. Can anyone see what I've done wrong? The yellow wires are the new section. I've checked the circuit voltage and on a 4.5v power supply, the voltmeter reads far less than this which seems odd.
Thanks,
**broken link removed**
**broken link removed**