Main > Monitor/Video Forum
My version of a bench power supply for CRT work
opt2not:
Nice! I should look for an enclosure too. I like how neat it looks and is easily moveable.
I built my testbench PSU (for monitors and boards) on a small piece of ply (this is before I added the monitor hook-ups):
No frills, does it's job, but not really nice to look at or is portable.
I really like yours. If I were to do something like that, I'd probably put some connection ports for attaching the switching PS.
That, and a 100v/120v switch so I don't have to relocate the isolation wires when I'm working on japanese monitors.
bperkins01:
I like yours too - I didn't think of supplying power to anything more than the CRT and didn't realize other monitors were not 120v (I'm learning on my first one)
I think we have the exact same transformer.
How do you do 100v/120v? Is that on the one you have now? or is that something planned?
I'll have to read up on that a bit.
If (when?) I get to bench testing other stuff that needs the switching power supply - I'll have to come up with something clever for it :)
opt2not:
--- Quote from: bperkins01 on January 08, 2020, 10:41:57 pm ---How do you do 100v/120v? Is that on the one you have now? or is that something planned?
--- End quote ---
Yeah I have that one currently. The top label shows what pins on the xformer supplies the 100v/120v. I wanna put a toggle switch on it so I can just use the same output connector and flip it to whatever I’m testing or repairing at the time.
bperkins01:
I just looked - pins 10 - 6 are the 120v.
Guess I need to find which on of 7/8/9 is the 100v.
It reads high with no load. Mine read 130v.
I see v2 coming up..
bperkins01:
I was going to do a V2 mod of this power supply. The transformer I have does not expose the windings to provide 100v. Looking around - they sell a completely separate 120v -> 100v isolation transformer. So if I need 100v someday - I can put another one of these together in about an hour.
V2 has going to have a digital voltage readout though.. It would have been cool. I like making tools as much as buying them.