Grove

Mailing list: grove-electronics@googlegroups.com

Boards

1. Main board - Teensy shield

   • 4 x 3 pins for 144/m 5m strips on trunk
   • 4 x 5 pins (power + rgb) for dispatcher board
   • 3 pins (power + data) for breathing sensor
   • Power switch
   • PTC fuse + zener diode
   • 4 pins for buck converter, 12V -> 5V

2. Sensor board

   • 3 pins from mainboard (power, data)
   • Proximity sensor (SI1143x)
   • IR motion detector
   • "breathing" sensor
   • active LEDs

3. Dispatcher board

   • 4 x 5 pins input (power + rgb)
   • 4 PicoBucks (six pins in, six pins out)
   • 16 x 6 pin RGB LEDs (r±, g±, b±)

Concerns

1. Power
   • 12V deep cycle marine batteries
   • Charging circuit
   • Solar array
   • Delivering 12V to each tree (voltage drop)
2. Firmware
   • Performance over time
   • Running 4x trunks vs 1 trunk 4 times
3. Lighting
   • Soldering high current LEDs
   • 144/m 5m vs splicing power

Timeline

• May 31: Initial meeting
• June 8th: Dispatcher board rev #1 sent to printer
• June 9th: Main board rev #1 sent to printer
• June 10th: Sensor board rev #1 sent to printer
• July 1st: Boards return from printer, soldering begins
• July 6th: Final board revisions sent to printer
• July 27th: Final boards return from printer, soldering begins
• August 20th: Installation begins on playa
• August 28th: Burning Man begins

Useful links:

Grove proposal: https://docs.google.com/presentation/d/1Oe51Et6uq_moFoTw9EoB07Vlh8WwSTc89PW6PQpZ1io/edit#slide=id.g12e5fa7d1f_0_1 Grove budget: https://docs.google.com/spreadsheets/d/1ltcCgIae5ANJpvHL2A5ckWDxvADcpXeD_jZIF5hPCvg/edit#gid=0 Prototypes and earlier installation: https://cambridge.nuvustudio.com/studios/grove#tab-proposal-url