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circuit diagram requst Answered

I am making a life sized 'operation' game for a fund raising event. I am fine with construction and artwork, but need a circuit diagram for the electronics, can anyone help please? Doyou recall the kids operation game where you have to remove bones without causing the buzzer to sound or the red nose to flash? I want a circuit (battery powered) which when tripped by some one touching the probe against the metal edge will make the nose flash for about three seconds and also trip the buzzer to sound for about the same time. Any one know how to do this please?

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mati ur rehman (author)2015-11-07

i want to make a metal detector using tda0161, when the detector detects the metal from a specific distance the buzzer sounds but as the metal comes near and near the buzzer sound increases!!

so anyone guide me for this circuit

i want to use this with arduino

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batjonesy (author)2008-06-04

Found a circuit diagram but don't understand where the wire marked with a red 'A' goes to?? Also where would I place the load (i.e. a light bulb). I presume the switch will be the tweezers for the game connecting with the ground (-ve supply rail). ???

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batjonesy (author)2008-06-03