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Radio Scotland · 4th Oct 2022, 5:30 pm

Put together a PSU from an old 4 amp battery charger, Used a 4700 uf cap for smoothing and a LM317 For regulation which gives me an adjustable voltage from 1.6 - 18.5 volts, Problem is the regulator keeps blowing after a few minutes even with no load on it, Before the regulator blows it works as it should.

Do i have a batch of faulty regulators ? They did come from china, Can't think of another reason why they keep blowing.

4th Oct 2022, 5:30 pm	#1
Radio Scotland Heptode Join Date: Jul 2020 Location: Larkhall, South Lanarkshire, Scotland. Posts: 671	Homebrew PSU Problems Put together a PSU from an old 4 amp battery charger, Used a 4700 uf cap for smoothing and a LM317 For regulation which gives me an adjustable voltage from 1.6 - 18.5 volts, Problem is the regulator keeps blowing after a few minutes even with no load on it, Before the regulator blows it works as it should. Do i have a batch of faulty regulators ? They did come from china, Can't think of another reason why they keep blowing. __________________ Help!! I've been electrocuted by a glass thing that glows