Posted on 20 Aug 2008
This is a guide to DIY an antenna for your access point.The reflector is designed to be fed by a dipole. That is why it is not circular. A dipole is long and cylindrical, the focal point on a circular dish is circular. The focal point on this design is a cylinder. The reflector is designed to be “square”.[more]
Posted on 20 Aug 2008
The follower bot is a pretty basic design using a differential drive system.The driver system built from Futaba S-148 servo motors mounted to the bottom of the plexiglass and the wheels use Dave Brown Lite Flite foam wheels to the control horn of the servos. The sensor system consists of an array of 3 matched IR transmit/receive pairs mounted on a circuit board that can be raised or lowered to fine tune the sensitivity.[more]
Posted on 20 Aug 2008
This Project began to explore the use of the DVSI AMBE 2020 voice compression chip and also the ADF7021 single chip VHF RF Transceiver from Analog Devices. It appeared that this radio could be made to talk D-Star and that turned into yet another adventure trying to fill in the many holes in the published “Open” D-Star Specification. [more]
Posted on 20 Aug 2008
This is a GPS repeater project.It used to repeat the GPS data.The purpose for the repeater is to allow the GPS to be outside, exposed to the satellite view, and allow the user to see the data below decks at the navigation station.It is intended to connect to Garmin-38 (and similar) hand held GPS receivers that don’t have external antennas.[more]
Posted on 20 Aug 2008
The burner is built on Veroboard and can be constructed very cheaply.You’ll need at least a 386 with 4 Megabytes of RAM, running MS-DOS (or equivalent), Windows 95, Windows 98, or OS/2. To read and write EPROMs, the parallel port should support one of the bi-directional protocols.[more]
