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Products => Test Equipment => Topic started by: NJ-Tom on December 12, 2012, 12:00:55 am

Title: Power supply current limiting - 150mA limit?
Post by: NJ-Tom on December 12, 2012, 12:00:55 am
I recently purchased a Tenma 72-8345a power supply from MCM Electronics. It may be sold by Farnell / Element 14 in other countries.  I'll do a review of it later, but at this point I am trying to decide whether to keep it -

I found that the current is only adjustable down to 150mA.  Is that normal?  This is my first "real" power supply so I have nothing to compare it to.

Other than that the specs are reasonable - 1-36V, 0-3A (so it claims! It should say 0.15-3 A), switchmode.  Price: $150.  In my initial tests with a 6V motor (which is what I was trying to current-limit at 50 to 100 mA) both the displayed volts and amps were reasonably close to my multimeters; if I do a full review I will get specific readings.

That is, IF I keep it... your advice; please!

-- Tom
Title: Re: Power supply current limiting - 150mA limit?
Post by: cybergibbons on December 12, 2012, 06:30:03 am
Some supplies struggle with lower current limits, but the spec sheet says 0-3A, so it should go down to 0.