The 555 timers I use don't always generate pulses

davenn

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again

Probably only because he has a wiring error

hence my continued insistence for photos !!
 
Actually I tried putting the circuit on the grey breadboard again. I think if you don't use for a few hours it will work
Again.
 
I don't think it is a wiring error.
 

davenn

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I don't think it is a wiring error.

Buddy .... do you REALLY want help or are you just going to screw us all around for ever ?

I don't think it is a wiring error.

Well since you don't know what is going on, you really have no idea if that is a correct statement

IF you really want help start answering questions and supply the info asked for
else you may find your thread getting closed
 

Baluncore

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Those prototyping boards are susceptible to bent contacts. If a thick wire is used it can open the contacts, then when a thinner wire is used, that contact may be intermittent. Worn contacts may also be a problem as oxide forms on the base metal.

When a circuit does not work, test the contacts by inserting a long link in parallel with the suspect link, use different holes in the same bars.

Look under the board. It is usually possible to remove the base to access the connector bars, remove a bar, clean out the dirt, then carefully bend the spring contacts back into shape.
 

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