"To invent, you need a good imagination and a pile of junk." - Thomas A. Edison
"To invent, you need a good imagination and a pile of junk." - Thomas A. Edison
Oscilloscope Clocks
Clocks that use a microcontroller and a DAC to draw a clock on an oscilloscope CRT.
Propeller Clocks
Mechanically scanned digital clocks operated by a PIC that uses an array of LEDs to create the illusion of digits.
Single Meter Clocks
Clocks that use a microamp meter to tell the time.
Single Numitron Clock
A miniature digital clock operated by a PIC that uses a small numitron to tell the time.
Single VFD Clock
A miniature digital clock operated by a PIC that uses a small vacuum fluorescent display to tell the time.
Analog Oscilloscope Pong Game
Two designs for a traditional or round pong game on an oscilloscope.
HandBall
A single player pong-like game using a 8X9 LED matrix that I designed ground-up from an idea in one day.
PongMan
A digital PONG game system using the AY-3-8500-1 stuffed in a Sony FD-40A WatchMan TV.
Smallest Tetris Game?
A tiny Tetris game using the PIC16F84A and a miniature camera viewfinder.
VGA-to-Scope Converter
A converter that converts a computer's VGA output to X, Y, and Z axes for an oscilloscope and turns the oscilloscope into a computer monitor.
Ultra-Simple Oscilloscope
Build your own simple electrostatic CRT oscilloscope based on solid-state or tube designs.
Ion Motor
A simple motor that runs off a Tesla coil by spraying ions.
Jacob's Ladder
How to make a fun and simple device that makes a high voltage rising arc.
Marx Generator
A generator specially made to charge up capacitors in parallel and discharging them in series for higher voltages.
Tesla Coils
This page contains several Tesla coil versions I've constructed. This entertaining, but dangerous machine generates high voltage discharges or lightning, which can light up fluorescent tubes and neon bulbs wirelessly.
Van de Graaf Generator
A small simple electrostatic generator that generates static electricity.
Voltage Converter/High Voltage Generator
How to build a simple relay-driven high voltage generator that runs off batteries.
Dekatron Spinner
A spinner using the neon-filled dekatron that runs off 120V mains.
Digital 0-150VAC Voltmeter
A two and half digit AC voltmeter using common TTL and CMOS components for measuring voltage from a variac.
Mini Amp
A miniature amplifier using a 6LU8 compactron tube.
Old-Fashioned Strobe
An all-tube strobe using the vintage 631-P1 neon-filled strobotron tube.
Relay Computer 1
A basic 4-bit binary electromechanical adder made entirely out of relays.
Relay Computer 2
A full CPU made entirely out of over 270 relays.
Subminiature Tube Superheterodyne Radio
A superhet radio that works well and uses subminiature "pencil" tubes.
Temporary Folder
Various interesting schematics and pictures of experimental projects are often stored in this folder so check them out if you are adventurous.
Tool Magnetizer and Demagnetizer
A very simple project with low parts count for quickly magnetizing and demagnetizing screwdrivers.
TV Tube Regenerative Radio
A regenerative radio receiver using a couple "worthless" TV tubes.
Two-tube AM Transmitter
Two versions of a two-tube transmitter design are noted here. The first is all tube and the second a hybrid using some solid-state with a pair of tubes.
Voltage Regulator Tube Nightlight
Great and useful circuit to light a hallway with the warm glow of neon at night.