Half Ohm adapter for multimeters measures small resistances

Posted on Monday, June 25th, 2012 in hacks, tools by DP

Half Ohm is a adapter for multimeters that allows you to measure resistance in the milliohm range. The project is open source, the design files are available in KiCad.

Half Ohm milliohm adapter is ready! Multimeter adapter that transforms any multimeter into a precision milliohm meter and debugging device. Notice that your multimeter is useless when measuring small resistances, like connectors or tracks. So did I, so I built this: 1% precise, small and cheap adapter for you. Ultra useful for finding position of shorts on your board. I have already used it tens of times.

Via Electronics Lab.

This entry was posted on Monday, June 25th, 2012 at 11:00 am and is filed under hacks, tools. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

One Response to “Half Ohm adapter for multimeters measures small resistances”

  1. Drone says:

    Hmmm… A quick glance seems this is just a single-ended op-amp with some gain. For the op-amp experts out there, wouldn’t a design with a differential amp or instrumentation amp make a better solution? Yes, a few more parts – but….

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