Category Archives: constant current

Test Unknown Fuses Without Destroying Them

There’s a problem with fuses. On the face of it, testing would seem to be a one-shot deal — exceed the rated current and see if it blows. But once you know the answer, the device is useless. If only there were a way to test fuses without damaging them. …read more

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Posted in constant current, fuse, misc hacks, parts, positive temperature Coefficient, PTC, resistance, testing, voltage drop | Leave a comment

Turning a Bad Bench Supply into a Better Bench Supply

‘Tis the season for dropping hints on what new doodads would make a hacker happy, and we have to admit to doing a little virtual window shopping ourselves. And as a decent bench power supply is on our list, it was no surprise to see videos reviews that the hive …read more

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Posted in bench supply, buck, constant current, DC_DC, DPS5005, misc hacks, programmable, Riden RD6006, switching, tool hacks | Leave a comment

Junkbox Constant Current Source Helps with Kelvin Sensing

Is it ironic when a YouTube channel named “The Current Source” needs to build a current source? Or is that not ironic and actually just coincidental?

Regardless of linguistic considerations, [Derek], proprietor of the aforementioned channel has made and disassembled a few current sources in his day. Most of those jobs were for one-off precision measurements or even to drive a string of LEDs in what he describes as a pair of migraine-inducing glasses. Thankfully, The junk box current source presented in the video below is more in service of the former than the latter, as his goal is to …read more

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Posted in constant current, current cource, four-wire sensing, kelvin clips, kelvin measurement, LM317, tool hacks | Leave a comment