A soft switch with integrated energy monitoring enabling spark-free switching for electric vehicles and drones.

DIY Arduino hot air SMD rework station.

Cool little Pocket Metal Locator sensitive enough to identify small nails and tacks in wood with four independent search coils and LEDs.

An Arduino powered floppy disk controller and reader/writer for making and writing disk images from and to old AmigaDOS floppy disks.

Use a 3D printed encoder wheel, LED, and 2 photocells to demonstrate how a quadrature encoder works.