Description
U4B: the world’s cheapest, lightest, simplest yet most flexible and expansion capable WSPR high altitude balloon tracker ever! Includes USB interface for configuration, 128K Disk, tons of features… perfect for hobbyists, research, education and more…
The “U4B” (Ultimate4 for Balloons): low cost, lightweight, feature-packed flexible high altitude balloon tracker with applications for hobbyists, researchers, education and more. The PCB is ready assembled, weighing only 1.8g and measuring just 33.0 x 12.7mm (without USB protrusion – remove before flight). Note that the current batch (November 2022 onward) uses a full-size USB connector, not the micro-USB on the first batch. Full-size USB is more reliable and it makes no difference to the final flight configuration size and weight because the USB part of the PCB should be snapped off before flight anyway.
U4B hardware, firmware and the telemetry-over-WSPR protocol was developed by QRP Labs with extensive collaboration with Dave VE3KCL, who launched 83 test flights from June 2015 to April 2022. It’s both the longest QRP Labs product development program, and the most tested, by far!
SIMPLE: the U4B can be configured just by entering your callsign. Then set up your own tracking page at the QRP Labs website, add antennas and solar cells, a balloon and you’re ready to go. Your tracking page will show the live position on a Google map, with the altitude, groundspeed, battery voltage and temperature.
More info at http://qrp-labs.com/u4b.html
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