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AC PSU - Little advice please?
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<blockquote data-quote="Shonver" data-source="post: 20153" data-attributes="member: 34"><p>Dewald already knows some hot chics.</p><p></p><p>Dewald, one idea is to use a voice recorder chip. It is a matter of recording or generating the required sine wave digitally, saving the samples to memory and playing it back in a continuous loop. Years ago an ex-colleague made electronic church bells for his church using this method. Got the tolling bell effect off a sound effects LP he found at the local library.</p><p></p><p>I may even be easier to use the microcontroller method. A guy like Gert (apologies for my <em>voorbarigheid</em>) should be able to cobble together something in no time.</p><p></p><p>The output from either of the above circuits would then be sent to a chip amplifier that would in turn drive a transformer in reverse. That is, assuming the amp is driving 12VRMS, use a 220-110-0 primary and 12-0/12-0 secondary (off-the-shelf) transformer. I'd guess you'll need a 50VA rated part. Drive one of the 12-0 secondaries with the amp, and use the other taps to get your desired output voltage.</p></blockquote><p></p>
[QUOTE="Shonver, post: 20153, member: 34"] Dewald already knows some hot chics. Dewald, one idea is to use a voice recorder chip. It is a matter of recording or generating the required sine wave digitally, saving the samples to memory and playing it back in a continuous loop. Years ago an ex-colleague made electronic church bells for his church using this method. Got the tolling bell effect off a sound effects LP he found at the local library. I may even be easier to use the microcontroller method. A guy like Gert (apologies for my [i]voorbarigheid[/i]) should be able to cobble together something in no time. The output from either of the above circuits would then be sent to a chip amplifier that would in turn drive a transformer in reverse. That is, assuming the amp is driving 12VRMS, use a 220-110-0 primary and 12-0/12-0 secondary (off-the-shelf) transformer. I'd guess you'll need a 50VA rated part. Drive one of the 12-0 secondaries with the amp, and use the other taps to get your desired output voltage. [/QUOTE]
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AC PSU - Little advice please?
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