Main Page

Hi, I'm Elijah Brown and welcome to my site, AD7ZJ.net! The name AD7ZJ is my ham radio callsign, and I occasionally post stuff I'm working on here for my own reference and for the benefit of anyone else who is interested.

Flying my Cessna 140 over Roosevelt lake

Electronics/Software Projects

Image taken off an ANSR flight from approximately 40,000 ft

This is a collection of side projects related to electronics and software. I enjoy tinkering with both.

• OpenAWOS Used at our glider field to automatically report wind over VHF radio.
• Vaisala 425A Anemometers Used by my diy AWOS system above.
• Remote Cellular Switch Used to turn on an engine pre-heater remotely.
• FLARM Teardown
• Stratus 1 Teardown

Arizona Near Space Research (ANSR) flies unmanned high altitude balloons around Arizona both for fun/education of its members and in support of several college programs. I have been involved in the maintenance and design of the flight tracking beacons identified below. For general info on the club or on student payloads, please visit our main site ansr.org.

• KA7NSR-12 (Flight Computer)
• New Flight Computer (KA7NSR-14)
• PIC APRS Beacon (AD7ZJ-11)

I have done a handful of projects related to ham radio and antennas. I'm an extra class operator and that just means I have extra fun with this kinda stuff :)

• Helical Magnetic Loop Antenna
• Maxon Data Radio info & repair
• DIY Current Meter Just some pics and ideas
• VHF and UHF antennas Some practical antenna construction tips

Mechanical Projects

• ASW 15
• PIK 20B
• Cessna 140
• DIY Large Solar Tracker

• Small off-grid solar setups

Misc Stuff

• Useful links
• Voltage Regulator Tube Lights
• Honda CRF230F
• Iteris RZ-3 Cameras
• Single Digit VFD Clock
• Single Digit IN-18 Nixie Clock
• Raspberry pi notes
• KD7LMO Archive
• Dump Windows Cert Authorities
• Vocore Temperature Logger
• OpenWRT expressVPN setup
• Chevy K1500 4L60E Transmission Rebuild
• Convert MCS to BIN