Hello chaps,
I've designed a circuit to vary the duty cycle for a square wave oscillator using lm339 chip. On proteus simulator, it guarantees that it'ld work in reality as expected. On the bread-board, I replicate the exact circuit as on proteus. The problem is that it doesn't oscillate.
Yes, I've checked all connections and they match their simulated one to pinpoint accuracy. Without the variable resistor, it oscillates nicely. The resistor isn't the problem bcoz I've tried it with another resistor and the result is the same.
I've attached 2 files. an image for the simulator and the actual proteus file.
Help me as fast as possible.
[is the formula for calculating FDN frequency the inverse of 2xRxC?]
I've designed a circuit to vary the duty cycle for a square wave oscillator using lm339 chip. On proteus simulator, it guarantees that it'ld work in reality as expected. On the bread-board, I replicate the exact circuit as on proteus. The problem is that it doesn't oscillate.
Yes, I've checked all connections and they match their simulated one to pinpoint accuracy. Without the variable resistor, it oscillates nicely. The resistor isn't the problem bcoz I've tried it with another resistor and the result is the same.
I've attached 2 files. an image for the simulator and the actual proteus file.
Help me as fast as possible.
[is the formula for calculating FDN frequency the inverse of 2xRxC?]
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