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Old May 8th 19, 01:13 PM posted to rec.crafts.metalworking
Jim Wilkins[_2_] Jim Wilkins[_2_] is offline
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First recorded activity by DIYBanter: Jun 2011
Posts: 5,543
Default 30 volt power supply

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Not exactly on topic, but close.

I just got a kit from China for the electronics for a 30 volt 3 amp
power supply. The voltage and current are adjustable. I bought it
off AliExpress for $ 3.8x including shipping. No enclosure or
transformer in the kit of parts.

If you look enough you can find a vendor on Ali that has a manual
on line with the schematic. The pcb is 3.25 inch by 3.25 inch.
The vendor I used is

FYD open source hardware