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.

If you get into more complicated PCB design, you’ll find the need to drill tiny and accurate holes much more often. Wouldn’t it be nice to have a precise way of doing that?

We did feature an earlier revision of the hardware back in 2010. Subsequent versions changed the frame to use an open-front design, ... drill the PCB 2.) change drill bit for mill bit 3.) ...

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 ...

PCB Design Best Practices: ... Set the Pads/Vias options according to the PCB manufacturer. Smaller vias with Drill diameter of 10 mils and Pad diameter of 20 mils can safely be used with most PCB ...