Talking alarm clock project help

Thread Starter


Joined Mar 23, 2016
I'm building a talking alarm clock w/2 diff. choices for audio ( through a center off dpdt switch). Each voice recorder has a momentary push button which will be activated by a 5v relay (set n.o & common) when the alarm buzzer sends a PULSING) 3v dc feed to the relay coil when it goes off. The problem is the pulsing makes the voice recorders play more than once a cycle because of the pulsing voltage.I think I need a logic circuit that gets pulsing voltage but will only kick the relay once & then resets. Does anyone know who makes this or how to build it? I assume transistors are used because they haves gates? thanks


Joined Aug 1, 2013
Lotsa ways to do this. What are the available circuit power voltages? Describe the pulsing buzzer signal in more detail.