Voltage and Current Panel Meters
I saw these on eBay, and thought it would be handy for observing both the voltage and current draw on my KiwiSDRs, so I ordered two:
They just arrived today, and I wired them in. One of my linear supplies is powering five KiwiSDRs, and they are drawing 3.3 amps total. The voltage drop across the current shunt on the meter is 77 mV, not fantastic, but tolerable. Just tweak the output voltage a little 😀
The second supply reads 1.3 amps with two KiwiSDRs, a netSDR, and a Thunderbolt 10 MHz GPS reference.
Obviously your power supply output needs to be floating relative to AC power for these meters to measure current.
The meters did require some minor surgery. It is tough to tell from the photo, but the current shunt interferes with proper latching of the current sense connector. So I had to heat the solder joints to bend it a little, so the connector clears.