Large Advent speaker (circa 1979), foam surround, crossover capacitor and resistor replacement information and pictures, crossover schematic diagrams, and Advent sales brochure and user manual.
and Pop Filter Symmetric Sound Systems PS-1
Symmetric Sound Systems PS-1 audio pulse swallower kit, This Kit was featured in Radio Electronics magazine in the 1980s.
Stereo Phono Preamp
Home built stereo riaa phono preamp used to interface a record player's magnetic cartridge output to the line level input of computer sound cards, and other modern audio devices without phono inputs.
Surfman, homebuilt electronics project designed to create the sound of rain, crashing surf, or unmodulated pink noise, Designed by John Simonton and featured in the August 1992 issue of Radio Electronics and Electronics Now combined magazine.
Electronics Test & Project Creation
Frequency Signal Generator
This audio frequency generator project was featured in the March 1984 issue of Radio Electronics magazine and is based on the XR-2206 function generator ic.
My build of the computer controlled automatic coil winder project that was featured in the June 2005 issue of Nuts and Volts magazine.
Coil Winder - PIC Microcontroller Based Control Unit
My first addition to the Automatic Coil Winder eliminating the need for a computer with parallel port to run the winder.
Coil Winder - PIC18F4550 Based Control Unit
This is the 2nd version of my PIC based Automatic Coil Winder Control Unit. It is based on the PIC18F4550 microcontroller and I paired it up with two LiniStepper driver boards.
Coil Winder - Arduino Based Control Unit
Page Under Construction - Arduino based automatic coil winder made with 3d printed parts.
PCB Factory version 2.1
Page Under Construction - Printed circuit board milling machine made from 3d printed parts.
A collection of home-built PIC chip breadboard modules, getting started programming a PIC chip with a JDM based hardware programmer, and a sound command input value to musical note table I created.
Bench Power Supply
My recently updated homebuilt work bench power supply.
Energy Related / Solar
with two Chronar panels
Homebuilt Solar Book using two surplus 6" X 12" Chronar thin film solar panels.
Briefcase with six Chronar panels
Six Chronar 6" x 12" solar panel built into a wood case.
All panels electrically switchable into various series and parallel configurations.
Panel - Chronar
Chronar 6" x 12" solar panel and characterization data.
Panel Testing Shunt
Solar Panel Testing Shunt for measuring the power output of small solar panels.
Shunt Regulator 100 Watt
Page Under Construction -100 watt solar shunt regulator for 12 volt solar.
LM2575 step down switching regulator circuit and efficiency data table.
Miscellaneous Electronics Projects
Schematic, pictures and information for my 15 minute aquarium filter and air pump shutoff timer for fish feeding.
Dakota ECM Repair
1988 Dodge Dakota ECM (Computer) Repair, ECM ignition coil drive transistor and suppression capacitor replacement.
Mini Jack - Hack / Repair
Replacing or bypassing a broken GPS Mini USB Jack / Power Connector.
Neptune 5500 Washer Repair
Repair information and photos of damaged control board components,and schematic drawing of the motor control board C phase drive circuit.
to Sound Card Interface for Skype
Homebuilt phone to computer sound card interface for Skype.
State Triac Relay
A triac solid state relay I built to replaced a failed mechanical relay used to power an inline HVAC duct booster.
Musical Instrument Related
/ Guitar Headphone Amp
This is my Bass / Guitar Headphone Amp build of Craig Anderton's Guitar Headphone Amp from his Electronics Projects for Musicians book.
Bass / Guitar Headphone Amp with Stereo Auxiliary Input
I designed a DIY musical instrument headphone amp with a stereo auxiliary input to mix the audio of a MP3 player, laptop computer, radio, or other device with an electric bass or guitar.
My build of Fred Nachbaur's Real McTube II musical instrument overdrive / distortion preamplifier.
Bass Fuzz, Compressor / Limiter and the Phase Shifter projects from the Craig Anderton's "Electronics Projects for Musicians" book.
The Practice Play Along mixes a musical instrument with your stereo system. This is a Craig Anderton design from his Electronics Projects for Musicians book.
Other Electronics Stuff
Information, parts suppliers, etc.
Vintage Lafayette LR-505 ( 505 ) germanium transistor and specifications.
Part number decoding & stepper motor specifications, Circa 1999
Stepper Motor Winding Wiring Diagrams
Diagrams with winding wiring color codes, Circa 1999
Cell Cadmium Sulphide 276-116 Data Sheet
Data sheet includes photocell specifications, graphs of the photoelectric characteristics, and circuit ideas.
Shack Transistor Application & Substitution Information
From the 1974 Radio Shack catalog.
Shack Transistor Specifications
From the 1976 Radio Shack catalog.
276-1020 Data Sheet
Includes specifications, silicon controlled rectifier theory, typical voltage - current characteristics graph, and circuit ideas.