Hallo,
Den U4B Balloon-Tracker gibt es jetzt mit neuer Software unter
Wie üblich ist ein neues 60 seitiges Opertations-Handbuch dazu erschienen.
Weil es so spannend ist, folgt eine Liste der Features
List of features:
- 33.0 x 12.7mm PCB (plus removable protrusion with USB connector)
- Weight: 1.8g (with USB protrusion removed)
- Onboard high performance GPS receiver
- 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
Advanced QDOS features:
- 19 GPIO pins – of which 9 can be configured as analog inputs and 8 are easily accessible via PCB edge pads; all 19 can be used as digital input or output control pins
- I2C bus for connecting additional sensors e.g. pressure, humidity
- BASIC programming language with full-screen text editor, compiler and debugger
- 128K Disk storage for your programs and data; BASIC can read/write data files
- Command line utility
- Telemetry over WSPR for relaying your additional sensor data
The U4B radio transmitter can transmit the following modes:
- QRP Labs tracking and telemetry over WSPR
- WSPR (including extended mode and slow 15-minute WSPR)
- JT9 (1, 2, 5, 10, 30 minutes)
- JT65 (modes A, B, C)
- Hellshreiber (standard, DX, and slow multi-tone FSK)
- CW (standard speed, QRSS, FSKCW and DFCW)
- Customized “Glyph” patterns can produce a unique idenfier on QRSS
und unter https://groups.io/g/QRPLabs/message/166208
findet man Infos von VE3KCL über den Flug U4B-46: