SCORCH

From philcrump.co.uk
Jump to: navigation, search
PCB Design in progress. Space in the middle fits a AAA battery.

A super-lightweight tracker, because CRAAG2 was starting to look a bit rotund compared to the community's recent developments.

This is designed to be a multi-use tracker that I can attach to any payload.

Code + Layout: Github

Potential Flights

Electronics

  • 1x AAA Battery w/ 1.8V MAX1947 Step-up
  • JTI Chip Antenna + uBlox MAX-6
  • TI CC430 RF SoC + Balun + 1/4 wave antenna

Power Consumption

Energizer Ultimate Lithium AAA: (1200mAh @ 1.5V) * 85% regulator efficiency = 850mAh @ 1.8V

  • 31mA - CC430 in +13dBm TX
  • 41mA - MAX-6 in Max Performance Tracking

850mAh / (31mA + 41mA) = 11.8 Hours

  • or 12mA - MAX-6 in Power Save

850mAh / (31mA + 12mA) = 19.8 Hours

Telemetry Packet

  • 50/300 baud 7n2 ASCII

$$SCORCH,1334,150234,519334,013445,12768,5*AC54

  • Callsign
  • Packet counter
  • Time
  • Latitude
  • Longitude
  • Altitude
  • Satellites
  • CRC16 Checksum

Tracker BOM

Actives

  • 1 off CC430 16K Flash, 48QFN - Onecall

Passives