1 Greenhouse Shield for Arduino
2 Copyright 2010 by Bdale Garbee, released under the TAPR Open Hardware License
4 This is a board my son Robert is building to monitor and control conditions
5 in our back yard greenhouse. The objective is a "shield" for an Arduino
6 Duemilanove board, with the following features:
8 - temperature sensor MCP9700A
9 - light sensor PDV-P9007
10 - humidity sensor HCH-1000 + TLC555
11 - i2c real-time clock DS1307
12 - i2c non-volatile memory for data logging 24AA1025
13 - 4 relay-switched mains (110 volt AC)
14 - electric heater (high current!)
18 - spi TeleDongle interface for RF link
19 http://altusmetrum.org/TeleDongle
21 The idea is that we log temperature, light, and humidity every so often to
22 the non-volatile memory with timestamps. On each sample, we check current
23 conditions and turn the heater on if it's too cold, and the fan on if it's
24 too hot. The hydroponics pump gets turned on and off on a regular schedule.
25 And the RF link provides a mechanism for remotely downloading the logged data,
26 changing setpoints and schedules, manual override, etc.
30 http://www.ladyada.net/learn/sensors/cds.html
31 http://klk64.com/arduino-spi/