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previous: peter Ok, I just decided I desperatly nee... -- 8/20/2000 3:43 PM

Re: spider power supply question

8/21/2000 3:18 AM

R.G.

Re: spider power supply question quote: "I have a transformer (220V to 12V I'm in europe so it's 220V here) but RG's transformer looks to be some kind of 1 x 220V in / 8 x 12V out...If I'm not mistaken."   I used a 110/110/10V/10V flatpack transformer to start with. I disassembled it and unwound only the secondaries and then rewound four secondaries where each 10V secondary was, so it's now     110:110: (8 x10V)     I did that partly to show what's possible with transformers. If you don't already feel like you can handle the transformer winding, don't. I see surplus transformers with 10Vac or 12Vac at under 100ma output for US$1 to $2 all the time. Get several of those and run the primaries in parallel, with separate secondaries.     quote: "instead of seperating all the ground connections to prevent hum, connect all the grounds to the power supply with diodes ? Aren't diodes supposed to be some kind of one way streets, and wouldn't this prevent ground loops ?"   Unfortunately, no. The diodes ARE "one way streets" for electricity. However, hum goes both ways, and even though one way might be blocked by the diodes, the other way gets through with the diodes. The diodes can't allow DC through and not allow at least part of the AC hum through.

 

Replies:

peter q{Unfortunately, no. The diodes ARE... -- 8/21/2000 9:46 AM