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.

Michael Colombo

Michael Colombo

In addition to being an online editor for MAKE Magazine, Michael Colombo works in fabrication, electronics, sound design, music production and performance (Yes. All that.) In the past he has also been a childrens’ educator and entertainer, and holds a Masters degree from NYU’s Interactive Telecommunications Program.


  • http://www.fortworthmakerspace.com Jason Haddock

    very nice would love to get my hands on a few of these

  • http://www.thedubstepcreator.com Tom

    Nice piece of hardware. Would definitely come in handy in this DIY MIDI controller project I found here.

  • Pingback: “Heatit” high-current Arduino clone « Bot Scene()

  • Robert

    It’s called current for god’s sake!

    Amperage. Honestly.

    • http://hive76.org pez

      Seriously — I found that the more I read the article, the more my annoyage increased.

  • http://essentialscrap.com jpa

    The summary didn’t mention the most important feature: the output current of each pin can be controlled, i.e. they have adjustable current limiters.

  • Jeff

    Nice looking design but needs work. Also: big(ger) MOSFETs or small relays. And a technical editor.

  • http://gigable.wordpress.com Bosstiger

    Reblogged this on Gigable – Tech Blog.