Video Tutorial After the Break…
Updated to Adafruits Lastest GFX LIB’s also includes them….3/10/2013
“JOS”, now uses Adafruits latest’s TFTLCD and GFX Libraries on arduino IDE v1.0.3 as of this post 2013. Which are included in the download as well. After some needed updates and conversions. I’m very happy to let you all know it is in fact a little quicker as well. There are still yet a few changes I want to make to rid a few repeating redundancies.
But alas I’ve received more than a few requests for updates and coding comments. So you asked and now you shall receive.
JOS stands for Jeremy’s Operating System and is open source. I encourage you to use it, hack it, and do what ever you want with it. I know some might say “it’s not an operating system!” I know, but it’s just a name. It is based on Lady Ada’s TFTLCD and TouchScreen libraries. It shares some of the code from Lady Ada’s tftpaint sketch found in the TFTLCD library. It is written in the Arduino IDE and works perfect with the 2.8″ TFTLCD breakout board and the Touch Shield.
I have painstakingly Spend many hours today going through every timer one by one and checking them on the Oscilloscope.
I can now accurately say these are all guaranteed within .05% precise…
A lot of this info is out there on the web but not much of it is all in one place and as easy to find as right here VS. Arduino’s Forums.
Getting all this data together for my projects has taken me much effort since a lot of it was hard to completely understand when every place said refer to the datasheet.
That’s great! The french in the data sheet says yes there are timer’s and yes they can be changed, but there was no dumb dumb version in there to say , Do this, Type this here.
There is a lot of info on this for other boards like UNO etc…. but they don’t work the same on the mega’s.
Update! Corrected Datasheet…..
These are a nice Led Dot matrix I found on ebay. I picked up 12 of them for around $14 US.
The leds are 8×8 and the total size is 32mm x 32mm.
If you want alot of leds in a small area these are great.
I bought them to use with an arduino for a led sign I was making. The only problem I ran into was trying to find a good data sheet that was also in english.
So I painstakingly Made one. You can get it below. Enjoy!
I have run across several Forums where people were all bummed about getting these said they didn’t work with Arduino’s matrix Libraries.
Well I’m here to confirm that in fact they do work with arduino led matrix libraries and 74595, Max7219/7221, AS1107 chips just fine.
That is after you use my datasheet and not the crap ones everywhere else on the net to wire them up correctly.
Your welcome Sobiguy OUT!