May 092013
 

Trammell came across a cache of punched paper tape recently. My immediate impulse was to create the most primitive tape reader possible. Thusly:

The rig is composed of a Teensy++ 2.0, eighteen red LEDs, eighteen resistors, and a few bits of laser-cut plastic. LEDs are used to both illuminate the paper and sense the holes. The sensor design is based on the classic Arduino LED sensing code. It’s not very reliable, but it’s a fun afternoon proof-of-concept.

If you’re interested, the code and design files are up on github.

 Posted by at 8:54 pm

  4 Responses to “A minimal punched tape reader”

Pingbacks (4)
  1. […] lies in their ability to allow you to quickly iterate and refine a design. Earlier this week I hacked together a primitive nine-channel punched paper tape reader, but it had a number of limitations: the LEDs that I was using to read the bits were noisy and […]

  2. […] Resistor’s phooky built a punchtape reader to read some old punchtapes. After an initial attempt, he built a new […]

  3. […] shared images of the Minimal Punched Tape Reader: “The rig is composed of a Teensy++ 2.0, eighteen red LEDs, eighteen resistors, and a few […]

 Leave a Reply

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>

(required)

(required)