5v for logic...

[WilliamD]

I was finally able to get the secondary coil of wire out of my microwave transformer. Not a quick tast! (And I only had to ruin a single trans before I got it right ) So I have the 40vac, which should be just under 60v for my geckos. But I want to run a 5v supply from the same transformer also. Do I need a seperate bridge rectifier and cap for this line? I figure if I add it to the bridge running the 40v, it will just add to the current. Am I correct in this thinking. I'll probably just end up using a 5v supply from a computer PS, but just in case. Any input would be greatly appreciated!

[ViperTX]

It's much better and easier to add a 5 volt power supply especially if you need a few amps. Stepping down 40 VAC can be done, but I wouldn't recommend it.

[WilliamD]

So, if I understand correctly, I should add another 5v supply from my transformer, and run it to its own bridge rectifier? I believe that's what I'm going to do.

[pminmo]

williamd,
If your referring to the 5V for the input of the gecko, that needs to be isolated so you can keep the common isolated to the pc. Don't use a regulator off off your 60V. Either use the computer power supply, usb connector if you have one on the PC, or a seperate isolated supply.

[Al_The_Man]

Originally Posted by WilliamD So, if I understand correctly, I should add another 5v supply from my transformer, and run it to its own bridge rectifier? I believe that's what I'm going to do.

That probabally only amounts to a 6~8 turn secondary to provide a separate 5v supply, and the gauge will be small if the current is just for Logic.
Al.