#supercapacitor.
Posts on the Alpisto engineering blog filed under#supercapacitor.
- 01#flybeeper#sun-vario#variometer
Measuring a vario with a USB tester: 20 seconds per mode, and 420 µA that were never mine
I spent eight hours per data point measuring a solar variometer through its own capacitor. Then I measured the same device directly with a USB tester and got a full consumption curve in twelve minutes — along with a 420 µA floor that belonged to the cable, not the device. What both methods agree on, where they don't, and how to read a WITRN tester from Linux.
14 min read - 02#flybeeper#sun-vario#variometer
FlyBeeper SunVario: the vario you never charge
A solar audio variometer the size of a matchbox that runs off a lithium-ion capacitor instead of a battery. Thirty minutes of morning sun fills it from empty; a minute on USB-C is enough for a flying day. 29 × 34 × 12 mm, 9.8 g, one button, Bluetooth to your phone.
7 min read - 03#flybeeper#sun-vario#variometer
A 10-farad vario, measured: where every microamp goes
Eight hours of discharge logs on a solar variometer running off a 10 F lithium-ion capacitor. The current isn't constant, the buzzer isn't the main consumer, the barometer is — and the runtime formula that falls out of it. Plus what the enclosure had to become once the electronics stopped changing.
18 min read