I built a 555 timer mono stabe(one shot?
It times for 6 sec and powers a relay. Works fine. Except when I first power the ckt up the timer starts its cycle. And if there is power surge, lights blink etc it self triggers. How can I make it work ONLY when a low is put to pin 2?
Thanks
555
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Re: 555
Greetings Roger,
One technique would be to hold the trigger pin above 1/3Vcc
with a resistor divider and AC couple the trigger pulse.
Comments Welcome!
Do you have a schematic? Can you post it?badtube wrote:I built a 555 timer mono stabe(one shot?
..... How can I make it work ONLY when a low is put to pin 2?
One technique would be to hold the trigger pin above 1/3Vcc
with a resistor divider and AC couple the trigger pulse.
Comments Welcome!
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