555 saw tooth

215

02:53:11

 Finally got this working  

My problem was that the LED came on and stayed on I was convinced all all the components were identical as the circuit I had copied 

FIX

turned out the circuit timing was different the freq  needed to be 40ms/s 
NOT  2.36 ms/s    
every time I fiddled with the circuit it would reset eventually it may have blinked if I had left it long enough

changing the value of the resistor between pins 2 and 7 alters the frequency of the output

published 4 years ago

Malcolm_McGrath

4 years ago

10khz 5 hz approx (not calc) 20khz 2.5hz approx 65.kkhz 1 hz approx 137khz 500 mhz approx *2 the resistance 1/2 the frequency

wyoelk

4 years ago

These may interest you, if you have questions, please ask _ _ http://everycircuit.com/circuit/5212107531091968 and http://everycircuit.com/circuit/5997908791656448

Malcolm_McGrath

4 years ago

wyoelk thanks, had just looked at your circuits prior to reading the above.

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