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Hacking the Zoyi ZT-MD1 LCR Tweezers

Reverse engineering the hardware and creating open source firmware for the Zoyi/Zotek ZT-MD1 LCR tweezers.

yspace-labsYSPACE Labs
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I reverse engineered the Zoyi ZT-MD1 LCR tweezers and the hardware seems especially capable for its size and cost. It uses a true 4 wire measurement method, and it has a high gain frontend with a switchable gain transimpedance amp, an instrumentation amplifier (I think), and a programmable gain amplifier. This gives the hardware a few more abilities than Zoyi's software allowed it to do, and hopefully, by writing custom firmware and opening this up as a cheap and accurate open source LCR meter, more features (such as 100kHz (and possibly 500kHz) measurement, short finding mode (change pitch of the buzzer as you get closer to a short on a board)
Better continuity tester (might require hardware modification due to high pass filter)
Basic voltage measurement (only capable of up to 3.3v), 5-10Hz update rate) can be added.

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