AD7ZJ Wiki ad7zjWiki http://wiki.ad7zj.net/wiki/index.php/Main_Page MediaWiki 1.43.3 first-letter Media Special Talk User User talk AD7ZJ Wiki AD7ZJ Wiki talk File File talk MediaWiki MediaWiki talk Template Template talk Help Help talk Category Category talk Main Page 0 1 594 590 2025-11-25T22:13:52Z Elijah 1 /* Electronics/Software Projects */ 594 wikitext text/x-wiki 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. [[File:C140_sunset.jpeg|200px|thumb|right|Flying my Cessna 140 over Roosevelt lake]] == Electronics/Software Projects == [[File:BalloonHorizon.JPG|200px|thumb|right|Image taken off an ANSR flight from approximately 40,000 ft]] I enjoy tinkering with electronics and software and I've done quite a few little side projects in this area. Here are the ones I remembered to write down and take pictures of :) * [[Long range WiFi]] &mdash; How I got internet service to an offgrid location 5 miles away * [[OpenAWOS]] &mdash; Used at our glider field to automatically report wind over VHF radio. * [[Vaisala 425A Anemometers]] &mdash; Used by my diy AWOS system above. * [[Remote Cellular Switch]] &mdash; Used to turn on an engine pre-heater remotely. * [[FLARM Teardown]] * [[Fixing a Stratus 1|Stratus 1 Teardown]] * [[Single Digit VFD Clock]] * [[Single Digit IN-18 Nixie Clock]] * [[Vocore Temperature Logger]] * [[Voltage Regulator Tube Lights]] * [[Iteris RZ-3 Cameras]] 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 [http://ansr.org ansr.org]. * [[KA7NSR-12|Flight Computer 1.0]] &mdash; The original ANSR flight computer and crossband repeater. * [[New Flight Computer|Flight Computer 2.0]] &mdash; Gen 2 of the flight computer. My first attempt at a non-trivial embedded project... * [[PIC APRS Beacon]] &mdash; A simple APRS tracking beacon. My goal was to generate the AFSK output without a modem chip. I have done a handful of projects related to ham radio and antennas. Here are a few of those - I think the magnetic loop is the most interesting. They are an excellent choice for HF if you are limited on space. * [[Kachina 505DSP]] &mdash; An early HF radio utilizing DSP for filtering and mod/demod * [[APRS Air Mobile]] &mdash; Running APRS while flying a small plane * [[Helical Magnetic Loop Antenna]] * [[Maxon Radio|Maxon Data Radio info & repair]] * [[DIY Current Meter]] &mdash; Just some pics and ideas * [[VHF and UHF antennas]] &mdash; Some practical antenna construction tips <br clear=all> == Mechanical Projects == I have been mechanically inclined for as long as I can remember. Unfortunately I often don't think to take pictures or keep track of stuff I've fixed or worked on, but here are a few highlights. * [[ASW 15]] * [[ASW 20]] * [[PIK 20B]] * [[Cessna 140]] * [[solar tracker|DIY Large Solar Tracker]] * [[Small solar systems|Small off-grid solar setups]] * [[Chevy K1500 4L60E Transmission Rebuild]] == Vehicle notes == * [[Honda CRF230F]] * [[Polaris Sportsman 500]] == Misc Stuff == * [[Dump Windows Cert Authorities]] * [[ATSAMV71 Microcontroller Notes]] * [[OpenWRT expressVPN setup]] * [[Convert MCS to BIN]] * [[Raspberry pi notes]] * [[KD7LMO Archive]] * [[Useful links]] jn7ihijcgnimwvflrx2uc6oaab1ckzt