The last and final design, the Teensy and GPS is directly powered from 3.7v li-on batt, 39g heights with IP4 box. Original project: http://www.f4huy.fr/?p=39 Arduino…
I « rebuild » my Geiger counter, the SBM-20 tube was initially inside the box, so, i have put this one inside a 32mm diam plastic tube,…