Hi Guys and Girls..
Long time listener..first time caller.
I'm rigging up a wireless timer for slalom skateboard racing, using a wireless door bell and a stopwatch..
I've found on the circuit board some terminals that go from 0.1 volts to 2.8 volts when the button is activated..and this needs to somehow trigger a short circuit to stop start the stop watch...(the door bell controller uses 3 X 1.5 AA batteries)
I can only find relays that activate on 5 volts..
can I use a chip so that this 2.8 volts can activate a gate and give 5 volts separate power supply to a relay, then in turn activate the stop watch?? or can I simply step up the 2.8 v to 5 v somehow??
Any ideas would be most appreciated cause i'm kinda stuck ....but suspect there's an easy way around it...
Long time listener..first time caller.
I'm rigging up a wireless timer for slalom skateboard racing, using a wireless door bell and a stopwatch..
I've found on the circuit board some terminals that go from 0.1 volts to 2.8 volts when the button is activated..and this needs to somehow trigger a short circuit to stop start the stop watch...(the door bell controller uses 3 X 1.5 AA batteries)
I can only find relays that activate on 5 volts..
can I use a chip so that this 2.8 volts can activate a gate and give 5 volts separate power supply to a relay, then in turn activate the stop watch?? or can I simply step up the 2.8 v to 5 v somehow??
Any ideas would be most appreciated cause i'm kinda stuck ....but suspect there's an easy way around it...