Old 09-20-2010, 08:29 PM #1
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Default current monitor during operation

What's the best place to setup a permanent DMM to measure current on a setup with external variable current pot (so that mv readings can equate to know/measured power)? Inbetween diode and driver? Inbetween driver and battery? Thanks!


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Old 09-20-2010, 10:54 PM #2
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Default Re: current monitor during operation

In series with the load.
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Old 09-21-2010, 01:05 AM #3
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Default Re: current monitor during operation

I'd solder a 1 ohm resistor between driver and diode, and measure mV across that.
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Old 09-28-2010, 11:21 PM #4
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Default Re: current monitor during operation

If the driver is linear, then it doesn't really matter, current in will equal current out. Still the best bet is to measure it on the output side, a precision 1 Ohm resistor will give you 1V per Amp. Cheap digital panel meters are available on ebay and elsewhere, although most need an isolated power source. I found some surplus DC-DC converter modules that work great.
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