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,…
I have just finished my OZ2CPu wattmeter, The uncalibrated signal response is: +1/-1 dB from 1MHz to 450MHz. Input SWR will varry from 1.00 to…
This is an easy way to power an highly brightness LED for 10 hours, some parts are recycled or was buy from ebay for 1$…
A lot of informations are available about ESP hardware over Internet … sometimes confusing, here is my experience’s about ESP8266 soldering and flashing, especially ESP-03…