Load resistor on low voltage power supply
Hi all.
I have a few load resistors lying around. I use them on DC power supplies, but am wondering if they would work on a low voltage AC power supply as well, say to test 0.5A on 19VAC supply. Thanks |
Re: Load resistor on low voltage power supply
They'll work fine so long as they can handle the power. 8.5W in the example you quote, but obviously current and power will depend on the resistance.
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Re: Load resistor on low voltage power supply
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Sounds like this is from a simple transformer? What do you want the test to establish? It may be productive to monitor voltage when that current is passing - if that's the current you will be needing. Depending on the relative size of the transformer, the volts may 'sag' at full current, so worth checking that. |
Re: Load resistor on low voltage power supply
Also worth bearing in mind that they will work for you just as they do on DC supplies, but only for testing purely resistive loads.
If you're making an AC supply, perhaps you're looking to work with inductive loads, in which case the maths gets more complicated than simple ohms law. Adam |
Re: Load resistor on low voltage power supply
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*complex numbers, not complex but A complex of two, just two, per number. Easy to see on graph paper, perhaps they should have been called graph or Cartesian (as in two dimensional) numbers. |
Re: Load resistor on low voltage power supply
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