jotux.
Embedded firmware and hardware engineer, since 2006. Off the clock I shoot barebow, and build web apps for the archers I shoot with.
HaveDone
Twenty years of things that shipped
Every project and accomplishment on one timeline: motion-sensor firmware and a patent, payment-terminal drivers, avionics data storage, ultra-low-power SATCOM, satellite flight software, and a lot of robots.
- Sierra Space Satellite flight software
- DMEA Avionics & SATCOM, technical lead
- Verifone Payment terminal OS drivers
- Honeywell Sensor firmware, patent US8035514B2
- NASA Stewart platform kinematics
BareBow.us
Web apps for barebow and recurve archers
The home for all six archery apps below. They run in the browser on a phone or computer, and the page installs to keep them one tap away.
CrawlMarks
Distance marks for your tab
Turn a few sight-in readings into a full set of string-walking marks for your tab, plus a wallet-size key card that maps every mark to its distance.
- Print a sight-in strip sized to your tab
- Shoot each distance and enter your readings
- Fit the curve and print a 1:1 tab template
BareTune
Read a bare-shaft test
Drag your fletched group and bare shafts onto the face, set the nock angle, and get the changes to make.
RangePlotter
Lay out an outdoor range
Place targets on a satellite map of your field with your phone's GPS and compass, to World Archery's field layout.
LineJudge
Is it touching the line?
Point your phone's camera at a close call and LineJudge looks for face showing between the shaft and the scoring line: if none shows, it's touching and scores the higher value.
HoldCoach
Timers for holding drills
Strength and holding drills with each step called out loud, from draw to hold and let down, so your eyes stay on the target.
PaperTune
Read a paper tear
Shoot a fletched arrow through a sheet of paper, drag the tear onto the app, and get the nocking-point, plunger, rest and spine changes to make.