I’m playing around with the MK111 timer relay kit that runs off 12VDC input and comes with a 12VDC relay.
It runs off 12 VDC with no problems.
I’d like to get it running off 9VDC instead of 12 VDC.
I swapped out the 12VDC relay for a 5VDC relay.
I checked the relay coil and it switches when i connect it to a 9V battery.
With the relay removed from the circuit board the timer circuit works and the led flashes.
When I install the 5VDC relay and connect the 9V battery the led lights up and the the relay closes but nothing else happens - no flashing led.
I also tried it with a 9VDC voltage regulator off a 12VDC source - no goes there either.
Any suggestions of changing some components?
Perhaps some capacitors or resistors?