mirror
/
LightAPRS-W-1.0
kopia lustrzana https://github.com/lightaprs/LightAPRS-W-1.0
1
0
Forkuj 0
Kod Zgłoszenia Projekty Wydania Wiki Aktywność

Update README.md

pull/2/head
Mustafa Tan 2019-08-06 19:54:48 +03:00 zatwierdzone przez GitHub
rodzic dfb42e2c48
commit 510d65eb77
Nie znaleziono w bazie danych klucza dla tego podpisu
ID klucza GPG: 4AEE18F83AFDEB23
1 zmienionych plików z 2 dodań i 1 usunięć
Pokaż statystyki Ściągnij plik aktualizacji Ściągnij plik porównania Expand all files Collapse all files

3
README.md
Wyświetl plik

@ -6,7 +6,7 @@ Because LightAPRS-W is open source you can add your own custom sensors via I2C/S
LightAPRS-W will be soon available on http://www.qrp-labs.com for order.
<img src="images/lightaprs-w-pinout.jpg" width="600">
<img src="images/lightaprs-w-pinout.jpeg" width="600">
**Important :** LightAPRS-W uses the amateur 2 meter (VHF) and 10m+ (HF) radio band which requires an amateur radio license to operate.
@ -127,6 +127,7 @@ A. Please check out our wiki page Tips & Tricks for Pico Balloons: https://gith
**Q. What kind of antenna do i need to use on LightAPRS-W?**
A. You can use any type. For airborne projects (such as pico balloons) we suggest quarter wave monopole antenna for VHF (2m APRS) becuase this makes your payload lighter. So just cut a light 50 cm. wire and solder it to antenna footprint (A1) Since your payload is airborn and wavelenght is 2 meters, you don't need a wire for ground.
But for HF length of antenna depends on your band chose for WSPR. For example if it's 20 meters, you need 5m for TX RF output and 5m for ground. Tie one end to the balloon and solder the other end to the groundplane of the PCB. Then solder another 5m of wire to the TX RF output on the PCB, and let it hang below.
<img src="images/lightaprs-monopole-wire-antenna-connection.jpg" width="600">