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[HELP] Timing circuit advise

eight08

Apr 16, 2010
14
Joined
Apr 16, 2010
Messages
14
I'm trying to build a circuit that would trigger at a certain amount of time, and then repeat.

What is the best design plan? :D:D:D
 

siggy

Mar 3, 2012
36
Joined
Mar 3, 2012
Messages
36
555 astable with a duty cycle less than 50%

R1 >= R2 iirc
 

siggy

Mar 3, 2012
36
Joined
Mar 3, 2012
Messages
36
Duty cycle is time on

1% to 49% is short on longer off
50% on off equal
51% to 100% is longer on short off
 

jackorocko

Apr 4, 2010
1,284
Joined
Apr 4, 2010
Messages
1,284
I'm trying to build a circuit that would trigger at a certain amount of time, and then repeat.

What is the best design plan? :D:D:D


What is the time period length you are interested in, mark space ratio? How accurate does the timer need to be? Have you read the sticky about timers?
 
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