On 9/13/2013 2:57 PM, Gerrit Heitsch wrote: > On 09/13/2013 09:15 PM, email@example.com wrote: >> >> On 2013-09-13, at 05:33, Jim Brain wrote: >> >>> Does anyone have ideas (or could point to a person or company) that >>> might have a way to safely synthesize an isolated 9VAC for the >>> machines from 5VDC? >> >> Yes, that's one of the things, I'd like to see solved for good as >> well. I was approaching it from different angles. Even "invented" PWM >> based sine-wave generation once before sleep ;-) The problem always >> was that in the end one needs a transformer, which is what I always >> wanted to avoid in the first place.. > > You can't. There is no way around a transformer in this case. I'm not opposed to a transformer. I have, I think, the other piece o uC DSS implementation (2 of them, one is a R2R implementation and 1 is a PWM implementation), coupled with a power transistor and a RC filter to smooth out the waveform. Now, if I could just find a 1:2 transformer that would handle 9VAC (9W?) and work at 50 and 60 Hz, I'd be golden. But, I know *NOTHING* about inductors and transformers. I faintly remember taking a part of a course on them in college, but nothing stuck. So, Bil et al, help would be appreciated. I looked at Coilcraft, and saw some step down and forward mode transformers, but I need the reverse, I think. Jim Message was sent through the cbm-hackers mailing listReceived on 2013-09-14 01:00:04
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