ADC/DAC module - PCF8591

Simple module with PCF8591 - this I2C module provides 4 analog inputs (8 bit resolution) and one analog output with digital drive.

On board You have thermistor, photocell and potentiometer. Using jumpers You can select if You want to use on board sensors or read voltage from inputs. This mean Your Raspberry Pi can easily measure temperature or know if there is light or not.