paragliding vario with arduino nano, piezo sounder, bmp280 altimeter, 9V battery
https://www.youtube.com/watch?v=9QVq33m_nv8
Instructions here https://github.com/danheeks/vario/tree/master/bmp280piezo
One battery lasted me two summers of amateur paragliding, maybe 50hrs, including a flight of 202km in the UK!
https://youtu.be/KGif6ZkmjKs?t=256
You can buy a kit to make your own for £10, doesn't include postage
It includes:
Tin
Arduino Nano
BMP280 sensor
Piezo Buzzer ( passive not active )
9V PP3 battery
battery connector and wires
On/Off switch
version 7 PCB ( currently waiting for an order, available around 20th June 2026 )
Sticker for front of tin
Or you can buy a working vario £20, doesnt' include postage, ( I have 2 in stock 6th June 2026 ).
Email danheeks@gmail.com for enquiries and to check on stock
