DIY Printer P4: Proof-of-concept with an LED

Posted on 2014-11-19 at 08:59 in Videos by Robbi-985.

Part four in this series of “making of” videos where I make a super-basic printer controlled by an Arduino.

There’s still no pen, so I stuck an LED where the pen will go and made it turn on when the pen should be drawing, as a test. Then, I took a long-exposure photo while it “printed” with the LED, pointing the camera upwards slightly after it finished each row. What I ended up with was a photo of the image that it tried to print, with inverted colours and stretched a bit because I didn’t move the camera at the right speed.

[Watch in HD]

It can also now print bidirectionally, and it’s much faster to receive the data for the next row of pixels, because they’re no longer sent one at a time.

Illustrations are by とんぐ (Tongu) and CAFFEIN (blog / Pixiv).


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