firealarmfrea785
New Member
Hey, i have a 555 timer wired up in bistable mode for a latch. It works fine the problem is:
I am running a fire alarm strobe on 18 volts, but the 555 timers max is 16. The strobe needs at least 18 to work correctly.
I am having trouble using my 18 volt power supply for my strobe and the 3 volts for the 555 timer.
Basicly when I connect the 18 volts, it triggers the circuit and when I hit reset the strobe does not turn off, even though the timer resets.
I need to know how to connect it to an external power supply, so the strobe can run on 18 and the 555 can run on 3-9 volts dc.
Chris.
I am running a fire alarm strobe on 18 volts, but the 555 timers max is 16. The strobe needs at least 18 to work correctly.
I am having trouble using my 18 volt power supply for my strobe and the 3 volts for the 555 timer.
Basicly when I connect the 18 volts, it triggers the circuit and when I hit reset the strobe does not turn off, even though the timer resets.
I need to know how to connect it to an external power supply, so the strobe can run on 18 and the 555 can run on 3-9 volts dc.
Chris.