Note: all Microcontroller based circuits use the Parallax Basic Stamp 2.x, or Parallax Javelin Stamp. Hopefully, given time I'll add a few Microchip PIC (program in Assembly) or Silicon Labs (ex Cygnal) C8051Fxxx (program in C) based ideas as well.

Important note: The circuits on this website use various voltages and currents. If you are not confident in tackling any of these circuit ideas yourself, then for your own safety, get an experienced electronics technician/engineer to supervise or help you in constructing and testing.

(Links open a new window...)

Non Microcontroller based circuits:
  Alternative Power - no more bills from the Power Company!
  Amplifier
 AM Transmitter
 Control circuitry for a Cassette Deck - CMOS logic version
 Fast NiCad charger
 Stepper Motor and Driver
 Adapter to get Cybot to work with your Mac in Virtual PC
 Combinational Logic
 Op Amp Circuits
 

Basic Stamp based: (program in basic)
 A to D Conversion
 D to A Conversion
  AM/FM Tuner Controller board
 Buses
 I2C
 USB
 Control circuitry for a Cassette Deck  Microcontroller version
 Datalogger
 Displays
Driving an Hitachi HD44780 based LCD display
Driving Matrix Orbital Displays
Make your own 5 digit LED display - for connecting to Microcontrollers
 Real Time Clock - I2C example

Javelin Stamp based: (program in Java)

Driving an Hitachi HD44780 based display

 Driving Matrix Orbital Displays

CoProcessors: - The PAK IX Floating Point Processor

8051 based: (program in C and/or assembler)
Driving an Hitachi HD44780 based display

Other stuff:

GNS

Software Apps...

Easytrax for Mac OS - I have had a number of requests for copies of Protel Easytrax for Mac OS. After asking Protel for permission to provide copies, and getting permission, well here it is here. Note, Easytrax 1.02 was designed during the old System 6 days of the Mac. I can not guarantee it will work OK on anything higher than System 7 (it can crash under 7, but you'll save every 10 minutes, right?). Easytrax works OK under emulation under OS X, using various 680X0 emulators.