Hallo,
Hans Summers hat es endlich nach langer Zeit mal wieder gebracht: - QRPP 27mW. Ein Balloon Tracker, den man auch für andere Projekte verwenden kann.
QuoteList of features:
- 33.0 x 12.7mm PCB (plus removable protrusion with micro-USB connector)
- Weight: 1.8g (with micro-USB protrusion removed)
- 32-bit ARM microcontroller running QDOS (QRP Labs Disk Operating System)
- 128K disk (implemented on EEPROM chip)
- 27mW (approximately) transmitter using Si5351A synthesizer
- TCXO referenced frequency stability
- Band coverage 2200m to 2m
- LM75 temperature sensor
- Status LED
- USB interface for configuration, programming and easy firmware update (just copy the new firmware file into the apparent USB Flash drive)
- Free firmware updates for life, when enhancements are developed as the use cases expand
Näheres : http://qrp-labs.com/u4b
Ein Video gibt es hier : http://qrp-labs.com/u4bund das alles für 59 $.
Hajo