OpenEnergyMonitor. OpenEnergyMonitor. Www.adafruit.com/catalogs/catalog.pdf. TMP36 - Analog Temperature sensor [TMP36] ID: 165 - $2.00. Wide range, low power temperature sensor outputs an analog voltage that is proportional to the ambient temperature.
![TMP36 - Analog Temperature sensor [TMP36] ID: 165 - $2.00](http://cdn.pearltrees.com/s/pic/th/temperature-electronics-22260504)
To use, connect pin 1 (left) to power (between 2.7 and 5.5V), pin 3 (right) to ground, and pin 2 to analog in on your microcontroller. The voltage out is 0V at -50°C and 1.75V at 125°C.