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X27.168 Stepper Motor Breakout
This is a breakout board for the Juken or Switec X27.168 miniature stepper motor used for the dash gauges on several GM vehicles. You can find them on eBay for around $25 per half dozen. When one stopped working, I replaced all of them, so have several used but still working units. The motor operates at 5v and draws 20mA, so can be directly connected to many microcontrollers, such as an Arduino, with this breakout. The sot23 dual-series diodes prevent flyback transients due to the inductive load.