Embedded Lab

Lucky Resistor has a very nice instructional guide for making an Arduino data logger with a capacitive touch pad user interface. It is a humidity and temperature data logger powered by Trinket Pro Arduino board. The power supply is provided with a lithium ion battery, which can be recharged wirelessly via a Qi charger. The sensor readings are stored in a I2C FRAM module and a Sharp memory LCD display along with a capacitive touch key pad provides a nice user interface to control the device. The AT42QT1070 chip breakout board is used to sense the touch input.

The user interface is an interactive menu with easy navigation through up/down arrows select buttons. The bottom info bar shows the current date and time, as well as the current readings from the sensor. Other features include setting sampling time interval, dumping data out to serial port, single button erase all function, and dat/time update.