Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Timer circuit design?

#30896

Timer circuit design? | 8 October, 2004

I would like to design a small delay timer circuit to activate from a switch that when it is N/O it starts timing for two seconds and then activates a buzzer. I am trying to use a 555 timer with a buzzer attached running from a two lithium 3v batteries. I would like it to reset if the switch goes closed and start again if open again. Can anyone help me with a circuit, Please?

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#30907

Timer circuit design? | 8 October, 2004

555 is a very useful and popular device. See, we're mostly a bunch of gearheads that assemble electronic products. For help with your design, look here: http://www.google.com/search?sourceid=navclient&ie=UTF-8&q=555+timer+circuits

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