#variometer.
Posts on the Alpisto engineering blog filed under #variometer.
- 01#flybeeper #sun-vario #variometer
FlyBeeper Sun Vario: a Solar-Powered Bluetooth Variometer Under 8 Grams
A solar-powered BLE variometer that weighs under 8 g and never needs a battery change. Supercapacitor energy buffer, USB-C emergency charge in 60 seconds, 500,000 cycles, operating range -15 °C to +70 °C — designed as a primary vario for hike-and-fly paragliding.
6 min read - 02#flybeeper #mini-bt #variometer
FlyBeeper mini BT: a Tiny Bluetooth Variometer Built on Zephyr RTOS
A dwarf-sized BLE 5 variometer on nRF52 + Zephyr RTOS, exposing pressure, temperature, altitude, four-button remote and OTA updates through standards-compliant GATT services. The entire stack — GPIO, SPI, PWM, ADC, FLASH, OTA, DFU, BLE, GATT, plus the OS — fits in 200 kB.
18 min read - 03#flybeeper #horn #variometer
FlyBeeper Horn: a Variometer-Whistle for Paraglider Pilots
The smallest variometer in the FlyBeeper line, doubling as an emergency whistle and acoustic distress beacon. A demanding miniature project that combines tight PCB design, a composite CR2032 holder, and a 3D-printed enclosure that has to actually whistle.
2 min read