proj:hemera:home

Table of Contents

Hemera
- Sensors
- Datasheets
- Revisions
  - Rev A
  - Rev B
  - Rev C
- Misc

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

Sensirion SHT11 Datasheet
Rohm BH1721 Datasheet Webpage
Panasonic PIR AMN42122 Datasheet

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

My BLIP Experiences

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