Building a Mini 5V Supply in a DB-25 Shell

RE: Building a Mini 5V Supply in a DB-25 Shell

Workshopshed — Tue, 30 Nov 2021 07:12:40 GMT

Second time I've seen this assembly technique recently, the other project called it "Manhatten style"

RE: Building a Mini 5V Supply in a DB-25 Shell

javagoza — Mon, 29 Nov 2021 17:13:59 GMT

A very smart and practical design. Congratulations.

RE: Building a Mini 5V Supply in a DB-25 Shell

jc2048 — Mon, 29 Nov 2021 12:41:08 GMT

That board looks nice and neat. Excellent presentation, as well.

I think your drawing of the internals of the device on your circuit diagram must be slightly wrong. The internal current source would drive R1 to give a reference voltage, wouldn't it, and that would then be compared with the output voltage to control the regulator; it wouldn't work with the output and the reference connected together like you've shown.

Not that it affects anyone building it, of course. The external circuit is no different.

RE: Building a Mini 5V Supply in a DB-25 Shell

DAB — Sun, 28 Nov 2021 18:19:53 GMT

Nice solution. I would not have thought of hiding a supply in a shell like that.

RE: Building a Mini 5V Supply in a DB-25 Shell

shabaz — Sun, 28 Nov 2021 15:24:31 GMT

Hi Gene and Michael,

Thanks!

RE: Building a Mini 5V Supply in a DB-25 Shell

michaelkellett — Sun, 28 Nov 2021 14:44:45 GMT

Nice PSU Shabaz. I 've never been into scraping boards but this looks like a convincing argument for it !

RE: Building a Mini 5V Supply in a DB-25 Shell

genebren — Sat, 27 Nov 2021 18:51:16 GMT

Great project/blog. What a handy way to power sensors. I have a bunch of power supplies (fixed and adjustable), but there never seems to be enough for some projects.

Well done!