I build this timer circuit which works but I've run into a problem.
What I want to do is have the circuit pulse a relay every 60 mins - the relay must turn on for a few seconds (say 5) and then off again.
Using the above circuit the the relay stays on for quite a few minutes - which is right as the chip is a counter. I need to wait for pin 3 to go low again.
I was thinking there must be someone to mod this, so when pin 3 goes high it turns on the relay and then using another circuit I do a reset on pin 12?
Am I missing something or is there an easier way?
What I want to do is have the circuit pulse a relay every 60 mins - the relay must turn on for a few seconds (say 5) and then off again.
Using the above circuit the the relay stays on for quite a few minutes - which is right as the chip is a counter. I need to wait for pin 3 to go low again.
I was thinking there must be someone to mod this, so when pin 3 goes high it turns on the relay and then using another circuit I do a reset on pin 12?
Am I missing something or is there an easier way?