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7 segment LED sign (parametric)

by jridley, published

7 segment LED sign (parametric) by jridley Mar 9, 2013

Description

Our FRC team needed a sign for their pit cart, so I decided to go kind of nuts on it.

Here's a video of the (nearly) completed project:
youtu.be/Z_A-J9ZV58A

If there's interest I could upload the electronics spec/program too, but it's pretty simple, anyone who has done any Arduino stuff at all can replicate it.

Recent Comments

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I didn't realize that I completely neglected to post that SCAD from your comment. Sorry about that, it's posted now.

Clearly I'm not a genius. Posted, thanks.

Uhhh, did I miss the Scad file with the segments? I only see the electronics box file. Van you post the other file?

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Instructions

Customize the SCAD for your specs. You can customize whatever you like, size, depth, number of LEDs, etc. Make a single segment and whatever masks you need. Turn on the segments that you need for each digit. For a 1 you can turn off "fulldigit" to make a narrow "half digit" as I have in the photo.

Remember it prints upside down so choose your segments accordingly. I use the standard 7 segment A through G terminology.

Print as many copies of the segments as you need. I printed the segments at 0% infill. They're still pretty tough (at 3 solid layers) and the light diffusion is a little better than if there's infill.

Put LEDs in, wired however you like. I used sets of 3 LEDs in series with 220 ohm resistors, intended to run off 12 volts.

I just hand wired the LEDs, inserted the segments into the masks, then hot-glued the bejeebuz out of it (as you can see in one of the photos), then drilled the corners and secured to the plywood with self-tapping "sheet metal" screws.

After completing the sign, someone immediately suggested that with the team name "Technical Difficulties" at the very least one of the digits should flicker occasionally. Therefore I built a controller based on an Arduino that does a few patterns including one of the digits is wonky every few seconds. You can see that as well as a glance of the electronics in the video above.

I also whanged together a quick box to cover the electronics seen in the video, saved as electronics box and plunger (for the mode switch).

Comments

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dwzimmerli on Nov 5, 2013 said:

Uhhh, did I miss the Scad file with the segments? I only see the electronics box file. Van you post the other file?

jridley on Nov 5, 2013 said:

Clearly I'm not a genius. Posted, thanks.

flytrevor on Jun 1, 2013 said:

This is AWESOME!!

GoolGaul on Mar 9, 2013 said:

can you post the .scad file for the segments?

jridley on Nov 5, 2013 said:

I didn't realize that I completely neglected to post that SCAD from your comment. Sorry about that, it's posted now.

jridley on Mar 9, 2013 said:

There's only the one SCAD, it does both, just call the segment() instead of the mask() function.

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