When it comes to percussion, [JimRD] has another idea: keep the beat by pounding the soundboard with a solenoid. He built a simple Arduino-driven MOSFET circuit to deliver knocks of variable BPM ...

An Arduino Uno converts serial over USB output to a bit stream ready to clock into the shift registers. On the computer side, [Chris] wrote up a basic CUPS driver which allows him to print from ...

Every eight solenoids, there’s an Arduino and a motor shield. The resulting junior player piano sounds like someone playing wind chimes like a xylophone, or a tiny Caribbean steel drum.

The legs are inspired by CT scans of real salamander limbs. Soft parts are created using silicone molds, combined with added ...

Arduino Nano. Capacitive soil moisture sensor. Raspberry Pi 3. 5V solenoid water valve + relay. Workflow: Arduino checks moisture and sends readings to the Pi. A Python script on the Pi decides when ...