Forum Krótkofalarskie PKI

I have released a RS41 solar floater, 434.500 100b 7n2 / aprs 432.5 using om3bc fw , the trajectory puts it over Poland tomorrow morning. it weigs about 15Gram and floats at around 9500m under a qualatex.





73
Mikael

https://imgur.com/MnxQ3Xa - tracker
https://imgur.com/GTDcosI - trajectory

it start up around 20° but it can take some time before gps lock

aaaaaaaaand it is gone... no sign of it neither on aprs.fi nor on https://tracker.habhub.org

Hi, its solar only and starts up at around 20° solar angle and work all the way down to around 16° and should wake up somewhere near Gryfice in NW Poland tomorrow morning.

73
Mikael

Anyway, did you registered your tracker on habhub?

Yes, its M6 on habhub site, https://tracker.habhub.org/#!mt=roadmap&mz=3&qm=1_day&f=M6&q=!RS_*,

Hmm, relay should have started now :/ the balloon might had been a bit overfilled and it might have bursted at sunrise, but we will see.

For information I have fitted a 3-Pin Microprocessor Reset Monitors (MAX809 2.93V version) to keep the microcontroller at reset state until the voltage on the cells came over 3V , the board was powered with 6x 52x26 cells direct to vcc.

I had cut of the bottom part of the pcb to save some weight.

https://imgur.com/AVujmWl

Do you have a CALLSIGN?

Yes &#128512,. My call is SA6BSS.


73
Mikael

Za zgodą autora opisuję modyfikacje rs41 'solar'.
Najważniejsze jest, aby utrzymać atmegę pod resetem, dopóki zasilanie nie będzie wystarczające za pomocą dodatkowego monitora napięcia - wersja MAX809 - 2,93 V (na rysunkach widać jak lutować).
Jako zasilania 6 szt. 52x26 ogniw słonecznych, zaczyna pracować od około 20° słońca i działa do około 16° (w środku dnia nadmiar prądu może ładować dodatkowy magazyn energii na noc jednak masa wzrośnie).