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Thanks for your answers,
I found that adding a diode after the filter capacitor to separate the circuit from it fix the problem. It is like the filter capacitor maybe influences the R2, R1, C1 series ?!.
I dont think a real circuit will have this problem, something may be wrong with proteus..
Hello,
I am trying to simulate a square wave with 555.
It works ok if i power the circuit with DC, but when i try to power from a rectified ac voltage source, 50hz, it does not work anymore.
I tried with Sine wave AC voltage source, also with Alternator, with or without transformer, with...
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