Boondog Automation - Lots of useful information for interfacing circuits with the computer.
Astable Multivibrator - A circuit I have needed in the past and a link I want to keep around.
Standard EIA Decade Resistor Values Table - The preferred value system for resistors.
Simple ADC - A simple analog to digital converter circuit.
ADC 0808 - The specs on the ADC 0808 chip.
DC Motor Control - A computer controller for DC motors.
Data Sheets - Data sheets for ICs.
Truth Tables - Truth tables for digital logic.
8255 Chips - Information about 8255 programmable interface chips. These are the chips I use for making my own computer digital I/O boards.
Hardware for the 8255 - More useful information and diagrams for using the 8255.
BEAM - A BEAM homepage. BEAM is a class of very small robots that are vert easy to build.
MiniBall Robot - A cool little robot.
How to Freeform the 1381 - A nice little tutorial on how to physically connect the particular transistors to build several of the BEAM robots.
Floppy - Floppy is a robot built from an old floppy disk drive. The original page seems to be gone, but here is another one with a similar, if not identical, version of floppy.