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Power Supply
How would I go about testing a regulated power supply. 5-20vdc 2amp
an old lafayete model. |
Power Supply
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Power Supply
"1PW" "OneNpOeSnPuAtMwhistle att a0l dot calm" wrote in message . .. wrote: How would I go about testing a regulated power supply. 5-20vdc 2amp an old lafayete model. Much depends on what you wish to use the power supply for. However, try a 10 ohm 50 Watt resistor across its output and measure the D.C. output voltage for purity from A.C. ripple and/or noise. A scope would be nice here. If you have the specs for this power supply, does it conform to your expectations? Maybe some of its caps have aged and require replacement? -- 1PW A 24v truck headlamp bulb or two is a good test load for this sort of thing. You can put just one on the end and sweep the supply from 5 to 20v whilst monitoring the output for voltage (make sure that it goes as far as it did with no load) and for ripple ('scope useful here, but low AC voltage range on a multimeter will do), then set back to half way - say 10v - then put a second bulb across the output to double the load, and make sure that the output voltage does not drop by more than a few mV. At the midway point of 10v, I would not expect the output voltage to change more than say 100mV on a halfway decent supply that was working correctly. On a good quality supply, it will be a whole order better than that. Arfa |
Power Supply
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