555 timer circuit

Dodgydave

Joined Jun 22, 2012
11,277
At switch on the cap C1 is discharged and so pin2 is triggered so pin 3 goes high, then the cap charges up through R1 and Vr1 until it reaches 2/3 of the supply 6V, then pin 3 goes low and pin 7 also this discharges the cap C1 until it reaches 1/3 supply 3V, then the cycle repeats over and over.....
 
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