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58% OFF 3Pcs Geekcreit® 5A XL4005 DC-DC Adjustable Step Down Module Power Supply Converter US$4.99 US$11.99 View It

Overall:

zivizivi 09/01/2018

looks fine haven't tested them yet. i would not trust this as it is for important stuff tho. the fail mode would be probably full input voltage at the output end... for modest currents need to fabricoble a heatsink, change the cheap trimpot with a metal film resistor or at least remove it and extend it with wires away from heat source, change the puny caps with something useful. then there is the heat issue again main chip diode and the inductor maybe just pot the whole thing. hmmm oh well they are cute little useful buck convertors when you need them you need them heh get some spares are always welcome price is fair.

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