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Topic: Arduino clones with more RAM than Uno? (Read 6 times) previous topic - next topic

john1993

thanks. im using the standard bobuino16mhz at the moment but both those links may prove useful. tom gave me a set of his customized bootloaders and while the m8 ones worked im having no luck with any of the m1284 ones. maybe for some of the reasons discussed in that thread. thanks again.

bratan

#31
Nov 22, 2012, 12:41 am Last Edit: Nov 22, 2012, 12:43 am by bratan Reason: 1
http://www.youtube.com/watch?v=Mj5q4dIM2Ik

It works!!! I just tried it with Mega 2560 and it has enough RAM to run my clock and WaveShield!!!  Mega 2560 was just a proof of concept, now I need to get it working on 644p (which just arrived). Thank you all for you suggestions!
Xronos Clock - A talking arduino based alarm clock is now available. Check out xronosclock.com for pictures, source code, schematics, and purchasing info :)

cyclegadget


I like your work and your display! The voice sounds pretty good too!

What is the distance between LEDs on the display? I am thinking about making one similar but, I need to know how far apart to put the LEDs to make it look nice like yours.

CrossRoads

Those look like dual color 8x8 matrices.
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

bratan



I like your work and your display! The voice sounds pretty good too!

What is the distance between LEDs on the display? I am thinking about making one similar but, I need to know how far apart to put the LEDs to make it look nice like yours.

Thanks! :)
I'm not sure about distance (probably around 2 mm), I'm actually using premade 32x16 bicolor board from Sure electronics  (DE-DP14112). It has 8 3mm 8x8 Green-Red LED matrices and driven by HT1632c ICs so it needs just 4 wires to connect to arduino (plus 2 for power supply). Previously I tried making display with other 8x8 LED matrices but it proved a little challenging to drive them. You can build your own and drive it with MAX7219 (2 per matrix) if you are good with PCB making. Those LED matrices arrange nicely, just put them back to back (most of them have grooves that allows them to arranged tightly next to each other, almost like lego).  I think it's more practical to use 8x8 LED matrices rather than making your own from separate LEDs, but of course it's up to you :)
Bicolor 8x8 can be found for as low as $1 each on eBay, and 32x16 display costs a little over $30.
Sure's matricies in DE-DP14112 are also much smaller than other 3mm 8x8 I was able to find. I don't know if it's good or bad, it will give you more DPI resolution, but smaller display overall...
But if you are planning
Xronos Clock - A talking arduino based alarm clock is now available. Check out xronosclock.com for pictures, source code, schematics, and purchasing info :)

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