The “Cheapo” Ammeter

cheapo-ammeter-002Figure 1: The “cheapo” ammeter for keeping tabs on SoC/SBC power usage.

I have a number of SoC/SBC based “homemade tablets” and “homemade server” boxes that consume anywhere from 300 mA to several amps at 5 VDC.  I wanted an easy way to check the power consumption under various load scenarios (GPU=on versus GPU=off, WiFi=on versus WiFi=off, eight cores versus four cores versus one core, etc).

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About ronaldscheckelhoff

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2 Responses to The “Cheapo” Ammeter

  1. Phishfry says:

    That is awesome. I built something very similar for my bench.

    Like

  2. Yeah – it’s too much trouble to dig out the VOM for a test, wherein I get tangled up in the test leads, and short out the power supply in the process!

    Like

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