Digital paint roller

via Make Magazine (online):

Digital paint roller

It’s a prototype called txtBOMBER, by Felix Vorreiter. It has seven solenoid-actuated pens and an Arduino for a brain. [via Dude Craft]

via txtBOMBER:

The txtBOMBER is a one-hand-guerillia-tool – a machine not much bigger than a pressing iron – that generates political statements on the fly and immidiately prints them on any flat surface.
If you feel you are part of our modern viewless generation, the txtBOMBER is the perfect tool for you! Just switch it on, it’s powered by a strong battery. And move it along a wall. It’s that easy to show your?its?someones? opinion of something?someone?! Hell! You should reconsider if you are keen enough to use it!
The txtBOMBER has seven build-in pens to “print” the letters and a micro-controller-brain (Arduino), no need for a computer or any other brain.

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