This is the first time that the payload will function (most of it) all at the same voltage (+5V). On previous flight, we had an unlucky combination of old Vaisala sensors (-21V), a mechanical camera (3V), CMOS controllers (5V) and the beacon itself (12V). Hardly a reliable setup!
Now, only the beacon will be connected directly from the battery, and 5V will be obtained through a switching power supply, garanteeing use of the batteries till the end. This also means we can simply add cells till the needed capacity.
The batteries were donated to the project by José María, LU8HSY... Thanks!
|Mediciones||Overview of the measurements, and individual graphs of the batteries.|
|Composite graph||Graph combining the discharge plots of all brands.|
|(c) John Coppens ON6JC/LW3HAZ|