Electro wrote: ↑Sat Apr 15, 2023 9:56 pm
You'll want it to be a 2 prong(no ground) double insulated(square within a square symbol) and agency listed(UL for example in the US, or similar depending on the country) for safety.
12v 4 amps is ideal
...but your 3 amp power supply would be fine if it reliably stays at 12 volts under load
Thanks guys! I just ordered this 12v 4a one, as it was listed as "Amazon's Choice", let's hope it's good, and safe!
https://www.amazon.com/COOLM-100-240V-A ... r=1-4&th=1
Man these transformers are HUGE!!! It's a bit scary. The ones in my Davey box were the size of my fingertip.
This is the right thing, right?
https://www.parts-express.com/70V-10W-L ... quantity=1
I have a feeling this is going to be unlike anything I've experienced before, and I wouldn't probably know the difference even with the parallel resistors (though I will leave them out as you wise folks recommended).
I'm using the outside wires on both sides of the transformer, right? (0.5 on the trode side and ??? on the amp side?)
I have an old Radio Shack project box that I will probably mount the stuff to. It has a choice of 2 lids, aluminum and plastic. I'm guessing I should try and mount everything to the aluminum lid? So it can act as a big heat sink? Anything I need to worry about in terms of isolation? I was considering heat shrink tubing the resistors over completely, so they couldn't touch the alum plate, but if that's overkill or a dumb idea, let me know. I'll be trying to wire it all up in a few hours, got company coming over, lol.
At least I can take it for a test run with the adapter I have on hand.
My plan is to use 2 mono jacks, so I can use the old 2B cables. If I want to do triphase (the only thing I know as that's what my D box is), is it ok to just clip both negative wires into an alligator clip with a single wire electrode on the other end, for the common?