Found some generic test rigs we made for small productions back in the day. They are based on a Raspberry Pi 2, and have a variable power supply with current measurement, ARM and AVR programming headers, digital and analog IO, connectors for a 'start' button and pass/fail indicator LEDs, and an RTC (since you won't get internet access in a small Chinese CM, especially in 2016!)
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These were placed inside test jigs, and delivered to our contract manufacturer for use as a black box tester/programmer. They tested a lot of art proejcts and blinkies!
