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555 pin3 output

I've been trying out a couple of Automatic Fence Lighting circuits with a 444, 741 and ldr.

I posted earlier about the circuits above , and the problem I had was that I could not get a buzzer to work from pin3 of the 555.

I came across this

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and found that out of x3 555's I had which I thought were faulty, only 1 was. The other 2 worked fine when used in that circuit, as both leds flashed on / off alternately.

When I replaced the good?? 555 back in the fence Light Circuit I built, there still no output to a buzzer.

So by logical deduction, I can only assume that the Light Fence Circuit I used/built has a fault in it somewhere.

Any pointers as to where I should look.

Reply to
RobH
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I give up.

Reply to
default

give up what?

Reply to
RobH

Beating a dead horse, of course.

Reply to
default

I suspect that you are an expert electronics engineer and I am well below you. If you can't help , then please don't reply.

In fact, no, reply if you want, as I will go elsewhere. Bye

Reply to
RobH

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