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.