开云体育

I think I have all the parts tracked down now. I am trying to find a cheaper source for the GPS modules. DigiKey has them, but they are $21 USD apiece plus shipping. Does anybody have any cheaper

Thanks, I take a look. -Dave

Hi, I have tested those tcxo:s in flight and they have been proven to be very stable. just change? to? 26000000 in

I am trying to find a BOM (list of parts) for the ICT WSPR tracker. I read the excellent PDF by yo9ict, but a few parts, such as the resonator and the 27MHz TcXO for the Xmiter are proving hard to

I prefer the upper edge of wspr bandpass, I have my trackes set at 14097185, the thought is that its less traffic toward the edges (upper/lower) of the bandpass and our low power signals have a better

Thanks Mikael.? What frequency is the best or recommendation for JT9 on 20m and 30m?

If you set it at 14.097.100 it will be in the midle of the 20m wspr bandpass, then tune your radio to 14.095.600 and listen, this is under the the asumpition you tcxo is genereting a perfect 27Mhz

Hi, I'm testing here WSPR transmitter confused here if I select WSPR? frequency 14095600UL I found signal on WSJTX 400Hz. So if I want to decode in WSJT-x (1400-1600Hz) then I need to set to

I purchased a LightAPRS-W tracker from QRP Labs for my first ever balloon project.? I'm trying to maximize my learning and enjoyment for the $115 investment.? These are my planned tests before

Should work but not tested. You should change the fuse bits and the board definition. Anyway, Arduino Mini has some weight. You'll have very slim chances at circumnavigation. Stick with the project

fine. thanks yo9ict. Question will work with normal Arduino mini 8MHZ 3.3V or the timers are only for 4mhz?

Final instructions, including Firmware and PCB layout, for the ICT-series balloons.

https://www.radioamator.ro/articole/view.php?id=1218

What page did you read? Have a little more patience, I am putting together the instructions.

I read the whole page about ICT3 and I see at the whole code with telemetry protocol you get it to atmega328p excellent. and the HW is bullet proff for temperature environments ::) You make me my day

Uaau ... 44days it seems you made a big job. If not a secret if you can put it together will be nice

I've improved and enhanced it to also comply with U3B telemetry format. Its been flown three times. Last flight is still up, more than 44 days airborne and yesterday completed the 2nd lap of the

Hi, thanks for suggestion I try to put it at the end of timing if ((minute() == 2) && (second() <= 30)) // Tx on minute 2 and 32, "30 second" prevents double transmission. WSPR is 2

Try adding another?setGPStime(); call within the TXtiming() function. Let me know if this cures the issue.

Hi, any update on code HABalloon v3 ? I tried and works great but after 4hours DT=+5.9seconds on fixed location Is there possibility to add simple function to set again gps time to correct seconds