This drill press was built to drill through-hole printed circuit boards. [Rhys Goodwin] didn’t want to shell out for new equipment, so he dug through his scraps to see what he could accomplis… ...

PCB, Case, Knob for VR1, Red and Black 4mm Terminals, Mains Flex, Expo Reliant PCB Drill. This project, including all text, images and diagrams, is copyright 1991 - 2003 Paul Stenning.

PCB Drilling Speed Control Circuit Schematic. In this circuit, the renowned timer chip LM555 (IC1) is used as a PWM circuit. The whole circuit can be powered from a standard 12VDC supply, capable of ...

Rejoice ! The latest Wemos D1 mini version (3.1.0) has mounting holes. But it lost the metal shield, which concerns me a bit. By the way the version shown here are not from the genuine Wemos shop ...