| Air pump (like CPAP) with pressure control, working with any brushless motor and ESC for breath help.
gfaman (40)
| Nixie night clock with alarm with motion sensor to show the time during the night
| Mini device which display PM2.5 with temperateure and humidity. Work on battery for weeks, display last measure, hourly and AQI value.
| For battery assembly, a spot welding tool is nice to have. I develop this portable version, using a super capacitor and recharged with stand...
| Display of your number of subscribers from your Youtube channel on an old fashion Nixie display with time
| Christmas was nice for the kids. Unfortunately, these toys need endless batteries. I replace them with 2 lithium phone battery with charger
| Display air dust situation as well as temperature and humidity:
| Alert a city biker when some cars are approaching too close on the left side or on the right side.
| Measurement of slow voltage variation and upload to the cloud
| Always on, solar powered, stand-alone 24/7 Wi-Fi repeater.