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aussie_bloke wrote:I foolishly connected the main DC power leads the wrong way around and blew up some components in some of the circuits which really upsetted me greatly!!!
gary wrote:Can you post the wave file Troy? I can soon tell you what is going wrong.
EDIT: it may be something as simple as an inverted signal - did you try the invert function on TBP?
aussie_bloke wrote:G'day Gary. Just tried the invert function, no change. Here are 3 wav recordings I've made. Should you get a picture out of them, what you'll see is a glass mosaic bowl.
gary wrote:Ok Troy, as can be seen by the following attachments we can say this about the recorded audio:
The video is on the wrong channel (right) it should be on the left.
The video is inverted.
There is little or no sign of any sync whatsoever.
The speed of the disk is not constant and varies between 435 and 415 RPM (approx).
When corrected (except speed) you get a picture that could be that of the mosaic ball (see attached).
aussie_bloke wrote:Thanks for the tips Gary. I have just checked the sync pulse output of the 400Hz clock circuit, all good in that department as I'm getting a pulse width of 2.5ms (see scope pic below). Also checked the waveforms in other areas of the circuits, but haven't got time to post them right now.
I have just discovered a problem with the 22k trimpot that connects to the 555 timer from +12V, when I turn it with the screwdriver I notice that it is glowing when I hit a certain point in the turning (see attached photo below), I am guessing there's some arcing going on inside. I guess I'll have to replace that trimpot. Question though, what does that trimpot adjust, does it adjust the voltage going to the 555 timer or the current?
Anyways more to post later today/night.
gary wrote: - it is hard to judge what is causing it without the circuit, but...In order to allow members to help you debug your circuitry it would be a good idea to post/repost your circuits (or links to circuits)..
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