Home » Electronics, Featured, Science, Things I've Made

Science is Wonderful

4 January 2009 3 Comments
Science is Wonderful

Kids are like giant sponges. I finally got my Arduino powered RGB LED Matrix soldered together and firing on all cylinders last night. I wrote a simple interface in Processing and then showed the kids after lunch today. Within about 30seconds they were having fun turning on and off lights. Here’s the result:

They saw how things were linked together, how a click on the screen lit a dot on the matrix and it was simple enough but yet they could quickly make shapes and letters. They got a big kick out of it and I’m really glad to be able to expose them to science and learning at such an early age.

If you’re interested in a closer look at the matrix driver circuit, checkout the gallery here:

3 Comments »

  • Jaume said:

    Did you made Pulse with modulation with shift registers? How could you make new colors since you said you were limited to 6+1 colors.

    Thanks.

  • Francis said:

    Hi Jaume, to answer your question, yes I found some code to do Pulse Width Modulation over shift registers. At time of writing I was limited to R, G, B, RG, RB, GB or RGB. With the PWM you can have colors that are partial-on.

    I have a post in draft that’ll include the code. As you can see from the pictures in the gallery lots of colors are possible. I have 16 shades of Red, Green and Blue so that’s 16x16x16 = 4096 in all I guess. It’s very hard to take photos or video that capture the variation of the colors but in real-life it looks pretty good.

    Since writing this I’ve also made a nice case for it that you can checkout here: http://picasaweb.google.com/lh/photo/ixT6QrC1MWkoiO6cHRVVNg?feat=directlink

    What do you think?

  • Jaume said:

    Amazing!! I asked because i saw the pictures and i thought there were more than 7 colors.

    I’m wating for the code, if it’s possible :) I’ll try it with RG Led MAtrix, because i don’t have a RGB one.

    So thank you for the answer.

Leave your response!

Add your comment below, or trackback from your own site. You can also subscribe to these comments via RSS.

Be nice. Keep it clean. Stay on topic. No spam.

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

This is a Gravatar-enabled weblog. To get your own globally-recognized-avatar, please register at Gravatar.