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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@allObjects
Check this ti / Texas Instruments DRV8835 out (Pololu Banana Robotics, also Adafruit)... The chip is built for low voltage driving / operating down to 2 Volts, max 11 (12) Volt motor power supply. Adafruit has also a version for higher Voltage: Toshiba TB6612 - TB6612 Datasheet. The breakout board is a bit fat compared to Puck and the Instrument Stepper, but gluing just a chip to the back of the stepper and doing some 'air-wiring' will get you down to the 'format' you are(?) looking for.