Build a 2-Meter Duplexer

This is a quarter wavelength resonator based duplexer design.

Build a 5 watt, 80 meter QRP CW Transceiver

Build a Basic Stamp Lightning Activity Monitor

Uses a Basic Stamp 2 to display the number of lightning strikes per minute on a row of 8 LEDs. Depending on the mounting configuration, the lightning sensor is capable of detecting lightning strikes greater than 50 miles away.

Build a Better Bass Trap

Build a flickering fire effect

uses four low wattage coloured bulbs and four fluorescent lamp starters

Build a generator from a lawn edger motor

Building your own generator (on the cheap). This basic generator (gas powered motor, alternator and battery only), can be used as a 12 volt power source.

Build a Simple Bat Detector

Build a Temperature Logging Serial Interface; the TEMP05

a serial logging interface between the Dallas Semiconductor One-Wire bus and a host PC

Build a Test Meter using Cheap 0-1mA meter

Build a Variable Voltage Supply for Cheap

This is a variable voltage 1.5A supply that can be built cheaply and used for bench experimeting. With a 24VDC wall wart, this board can produce anywhere from 23V to 1.2V