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Power supply amp measurement? Answered

My power supply says it can supply 12 Volts @ 10 amps.  It used to power 2 linear actuators drawing max 4.6 amps each, but no longer does. It still supplies 12V measured by multimeter. Is there an easy way to figure out how many amps it now supplies?

Discussions

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iceng

3 years ago

If you have a compass you can make an amp meter.

The amount of swing of the needle off of north is proportional to current.

if this is interesting to you ask me to expound

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Josehf Murchison

3 years ago

You test all power supplies the same loaded, or you get false readings. So you may not be getting 12 volts if the output was not loaded.

12 volt halogen light bulbs connected in parallel until you reach the max current is good.

Solar Light 02d.bmp
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verence

3 years ago

To check your power supply, you have to measure it under load. It may produce 12V when unloaded but that voltage may drop with the slightest load. Good test loads are automotive or household 12V halogen light bulbs.

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thisistedverence

Answer 3 years ago

TY. I was hoping that there was a simple, single step. Oh well, bring on the light bulbs!

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steveastrouk

3 years ago

I suspect the actuators can pull much more than 4.7A each as they start up, hence the power supply is ill.