WSPR-zero Evolution
WSPR-zero v1
v1 of the custom WSPR-zero board. This version had pins for serial TX/RX connections to an external GPS.
WSP-Zero v2 with RTC Headers
Moving from GPS to an I2C Real Time Clock makes the software a lot simpler and the system smaller vs using GPS for accurate time keeping.
WSPR-zero v2
New headers for connecting a Real Time Clock.
v2 Raspbery Pi Hat
WSPR-zero v2 is fully compliant with the Raspberry Pi Hat specifications. The board footprint fits on full size Pis and the breakaway section is designed for use on the Pi Zero.
Scale vs a quarter
The Raspberry Pi Zero 2W provides an excellent platform for ultra portable WSPR transmission.
Raspbery Pi Pinout
Version 1 of the custom WSPR-zero board showing the traces. Jumpers used to prevent unintended back voltage on unused filters.
Ultra portable WSPR-zero
Add a half wave antenna from thin wire and you have the perfect side quest for hiking or traveling.
Cheap antenna
$4 for this 30 meter antenna using some wire and a couple of parts from the hardware stor.
6″ Pelican Case
All the components including antenna and battery pack fit into a small Prlican case.
Sierra Nevada Backpacking
Backpacking with an early prototype.
WSPR-zero in John Muir Country
Early prototype using the TAPR 30m board
24 Hour WSPR-zero Spots
K6FTP 30m wire half dipole antenna on hedge