We all know the Arduino as a versatile electronics prototyping
tool, but it is often lacking in applications that require
higher amperage. In response to this, a team of designers and
programmers created Heatit, an open-source board in its final
stages of design based on Arduino that also has the capability
to deliver eight outputs at 12v and 500mA each. Output pins can
also be combined for even higher amperages. This means that with
Heatit you can control materials and devices such as
thermochromic ink and paint, conductive thread, muscle wire,
laser diodes, and solenoids. It also has standard 5V I/Os
enabling it to use a variety of sensors, switches, etc. The slim
design and use of through-holes also make it ideal for wearable
applications.