...
- 3x Raspberry Pi 0 with camera (beware, need special camera cable: https://www.adafruit.com/product/3157)
- HV320 HV330 without PA (or equivalent modelwith PA?)
- PA (e.g. https://www.minikits.com.au/70cm-7W-Amplifier, or self designedneeds to be a PA which supports wide bandwidth and digital modes. CW/SSB PAs are problematic)
- Antenna
Ground Station
- Notebook
- USB Receiving Adapter (e.g. http://www.hides.com.tw/product_ut120_eng.html)UT-164)
- AntennaAntenna (multiple Antennas, like Dipol + Yagi + Helix antenna)
Things to discuss:
- Frequency? (D: I would prefer 70cm/440MHz, easier to get PAs and is less problematic in regard to doppler)
- Bandwith? (HAMs usually use 2.-4 MHz, commercial products use 5-8 MHz)
- Power? (run the PA+Modulator all the time or only at timeslots)
Ampli
- COTS solution (HV-330) or partly-selfdesigned solutin (e.g. Intel Quark + UT-210)
- COTS-Solution:
- Pro:
- simple, works reliable, no need to implement the stream protocol
- Con
- only one stream (e.g. interleaved 4 pictures in one picture)
- Pro:
...
| Device | Input voltage | Power usage | Usecase | Size | Weight | |||
|---|---|---|---|---|---|---|---|---|
| Raspi Zero | 5V | 240mA Source, 350mA max | Video recording (with camera) | PCB: W(65mm) x D(30mm) | ||||
| HV-330-A / B | 12V | 300 mA@12V without PA | HV320E | 5V/12V | 1420 mA@5V | Encoding, Modulating, Transmitting | PCB: W(100mm42mm) X D(70mm42mm), Case: W(105 mm) x D(75 mm) x H(35 mm)stacked | PCB: 55g25g, with Case:175gPA,Fan,etc: 70g |
Bill of Materials
| Qty. | Device | Weight | Price | |
|---|---|---|---|---|
| 3 | RaspberryPi 0 | 9g | $5.00 | |
| 3 | PiCamera Module | 3g | $19.95 | |
| 1 | HV320E Modulator | HV-330-A Modulator | 70g (typical55g (less case) | $280 |
| 1 | Amplifier | ~20g | ~50 | |
| 1 | Power Distribution Board | ~40g | ??? | |
| X | Heatsinks | ??? | ??? | |
| X | Cables | ??? | ??? | |
| 1 | Lithium Polymer Battery | ??? | ??? | |
| Totals: | ~500g | $550 |
...