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Hemera

Hemera is a sensor board designed to monitor indoor spaces. It features motion, temperature, humidity and light sensors and is built using the epic platform.

Sensors

  • Temperature and humidity: Sensirion SHT11
  • Light: Rohm BH1721FVC
  • Motion: Panasonic AMN32122

Datasheets

Revisions

Rev A

7-29-2010

Initial design. Based on the Irene design.

Rev B

9-01-2010

Changes:

  • Modified the light sensor circuit.

Rev C

11-17-2010

Changes:

  • Replaced the analog light sensor with a digital Rohm light sensor.
  • Added cutouts around the SHT11 to prevent heat transfer from affecting the reading.
  • Moved the external inputs to the side of the board.

Misc

proj/hemera/home.txt · Last modified: 2012/11/26 18:47 (external edit)