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 … Continue reading TMP36 Analog Temperature Sensor

BMP085 Analog Barometer & Temperature Sensor

The BMP085 is an analog barometer/atmospheric pressure sensor coupled with a temperature sensor. It's analog and uses a two-wire I2C interface. I got mine from Adafruit. They include some pin headers you can solder to it or you can wire it up directly. A great tutorial from Adafruit is here. It's a pretty little sensor.. … Continue reading BMP085 Analog Barometer & Temperature Sensor

DHT11 Digital Temperature & Humidity Sensor

This was my first sensor. It's a digital temperature and humidity sensor. It uses three pins, two for power and one for data. It worked perfectly...except....the libraries provided by Virtuabotix ($9.99 via Amazon.com) didn't work with the Arduino IDE v1.0. So if fixed it! You can download the library from this post. Remember to place … Continue reading DHT11 Digital Temperature & Humidity Sensor