Ehsoon
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hi dears.
I'm a bit new in Electronic, and now want to make a tachometer. I designed protection and supply circuit according to CS8190 datasheet and another tachometer's PCB. I've produced the 8.9v DC voltage for pin8 of CS8190 and a square wave to pin3. but now I can't see any thing in pin2. Can any one guess where the problem can be?
I'm a bit new in Electronic, and now want to make a tachometer. I designed protection and supply circuit according to CS8190 datasheet and another tachometer's PCB. I've produced the 8.9v DC voltage for pin8 of CS8190 and a square wave to pin3. but now I can't see any thing in pin2. Can any one guess where the problem can be?