LCC Requirements

The Lizard Climate Control system has these requirements (updated as they change):

  • turn lights and heaters on/off at specified times
  • maintain specified temperatures during day and night
  • report current temperature/humidity both locally (at cage) and remotely via internet
  • manual bypass of Arduino control of AC switches
  • built in fail-safe for over temperature situations
  • protect sensors from lizard and other in-cage hazards
  • visual indication of temperature situation (green=good, red=bad etc)
  • document it!

 

TMP36 Analog Temperature Sensor

The TMP36 was my first sensor and is pretty simple. 3 pins, 1 analog port.

Available from SparkFun.

It’s a low voltage temperature sensor. It provides a voltage output that is linearly proportional to the Celsius temperature. It also doesn’t require any external calibration to provide a typical accuracy of ±1°C at +25°C and ±2°C over the −40°C to +125°C temperature range. Give the it a ground and 2.7 to 5.5 VDC and read the voltage on the Vout pin. The output voltage can be converted to temperature easily using the scale factor of 10 mV/°C. For Example:

Continue reading “TMP36 Analog Temperature Sensor”

Tri-Temp Project Intro

Description

This is the Tri-Temp project. It comes in two flavors- Standard and Ethernet. The Standard version outputs all readings on an LCD. The Ethernet adds output to HTML via a web browser. I did not design this to use an Ethernet shield- only the Arduino Ethernet- it’s more compact.So what’s this all about? Reading the Temp and Humidity! Nothing special going on here, just reading the digital data from three DHT22 sensors and displaying it.

Continue reading “Tri-Temp Project Intro”

My Arduino Goals for 2012…

This is what I’m hoping to get accomplished….

  • Temp, Pressure, Humidity monitor for the house with stats by Cacti. Ethernet Arduino required!
  • Cat food dispense- dispense 1 cup daily, possibly allow cat to initiate dispensing up to 1 cup limit.
  • Shower timer- time showers by listening to the water noise
  • Power monitor- find a way to monitor power usage either by outlet or at the fuse box. I know there are solutions but they’re expensive and non-hackable…
  • Weather station that updates to the internet- biggest hurdle here is parts…
  • RFID door locks
  • PC hardware monitor…I want to log the various temps on my machine but sadly all the sensors aren’t accessible via software. I hate writing windows software so this could be a creative way to do it.