Runs entirely at 3.3V, which is fantastic. The silkscreen on the plaque is somewhat misleading. I eventually reverse engineered this board and created a Github page to document and share my research: github/technerdchris/boards/tree/master/D4184. When connecting this board, treat Vin and GND as a MOSFET source connection only. . Vin+ and Vout+ are only related to each other and their names don't matter. The TRIG/PWM input goes to the gate and the LED. Vout is a drain.
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