G Thread Starter glenwanda Joined Aug 25, 2010 3 Feb 10, 2011 #1 Need a schematic for a voice activated relay. 9vdc. momentary on then off. Hope someone can help me. glenwanda
Need a schematic for a voice activated relay. 9vdc. momentary on then off. Hope someone can help me. glenwanda
nerdegutta Joined Dec 15, 2009 2,676 Feb 11, 2011 #2 Hi. Just thinking.... A microphone picks up some sound. It will trigger a 555, monostable timer, and the timer will activate the relay. After a period of time, the 555 time-out, and the gos off. Something like that? After a quick google I found this:
Hi. Just thinking.... A microphone picks up some sound. It will trigger a 555, monostable timer, and the timer will activate the relay. After a period of time, the 555 time-out, and the gos off. Something like that? After a quick google I found this: