Electronics

Induction cooker Brief investigation of the waveforms in a 2kW induction cooker.

PCB drilling viewer Gadget to drill PCB boards by optically aligning the underside of the board with the drill axis

Surface mount component soldering arm Useful tool for holding surface mount components in place whilst soldering

PowerPAD™/MSOP-8 heatsink Small copper-foil heatsink for PowerPAD™ IC packages to allow hand soldering

Dual AA battery eliminator If, like me, you have a little digital camera which runs from two AA batteries, then you probably will be fed up with using a lot of batteries when you're taking pictures or videos around the house. This little circuit is a simple 3V adjustable regulator which runs from a 5V supply. I made the adaptor to fit a Nikon L2 camera, but it should work with anything.

Laser-cut solder stencil Trial of making a solder paste stencil using transparency film cut with a CO2 laser.

LED on conductive glass A surface-mount LED mounted on a piece of conductive glass.

Nixie tube counter Simple counter circuit to drive a Russian IN-8 nixie counter tube using a PIC. Also interfaces to a telephone rotary dial.

Digital Kirlian photography Using a digital camera to take Kirlian photographs.

Excellon to G-code converter Program to convert Excellon drill files from Eagle to G-code suitable for running a CNC machine. Also performs geometric transformations to correct for distortion in the board.

Double-sided exposure alignment jig A useful jig for exposing double-sided things, such as for PCBs or photochemical etching.

New 3V camera supply A better 3V supply for my digital camera, this time built in an ATX supply case.

Planté rheostatic machine A completely mechanical means of charging a string of capacitors in parallel and discharging them in series to obtain increased voltages

TIG welder with HF start This is not my work, but is a backup of a page I found on another site. It describes the construction of a 180A TIG welder with high-frequency start.

High-voltage trigger and capacitor dumper This arrangement was originally designed as an attempt at pulse arc welding, but is useful where a high-voltage, high-frequency trigger pulse is required.

Power ultrasonic driver Inverter power supply for a 28kHz ultrasonic tank transducer

Spark radiation detector Spark detector for α particles

Surface mount adapter boards Allows SMD devices to be used on a 0.1"-pitch breadboard

40-400V, 20W power supply General-purpose high-voltage power supply for experimenting with Nixie tubes and the like

Making a current-sense resistor How to make a low-ohmic sense resistor using a short piece of resistance wire

Potentiometer end-stop modification Altering a cheap carbon potentiometer to obtain smooth adjustment at the end of the wiper travel

ICSP adapter for EasyPIC5 Making an adapter cable to allow PICs to be programmed externally

TV CRT Tube Socket Socket for TV CRT necks

Bayonet bulb plug adapter Plug to make electrical connection to a light socket

Faulty PCB pin header connectors Not all 0.1" PCB pin header connectors are created equal. A particular intermittent fault was traced to bad connectors.

Removing ground/earth from site transformer This mod allows a site transformer to be used as an isolation transformer with a 110V output.