12/9/2023 0 Comments Arduino led cubes![]() While the breadboard is out it's a good time to test and validate the LED current limiting resistors you'll need to use. As an aside I didn't find a single defect and was very pleased with the quality of LED's.Ĭhoosing current limiting resistor values ![]() Once you get into the hang of pushing an LED into the breadboard, pressing the button, watching the LED flash through the colours it doesn't take too long to review all 512. One LED would act as a common reference for all the others to ensure that all the LED's were of a common brightness. To simplify the approach I designed a little breadboard and a simple Arduino program which would drive two LED's Red>Green>Blue individually and then all on for White on the press of a button. The last thing you want to to find a dud LED in the middle of your cube so I set about testing each of the 512 LED's I would use. Whilst cheap I was a little concerned about quality. ![]() The design I chose uses 5mm Common Anode RGB LED's - so each LED has a Cathode (negative) wire for each of the three primary colours (Red/Green/Blue) and a single Anode (positive) wire that is common for each of the colours. eBay is your friend here and I bought 1000 from a Chinese supplier. Using Kevin's schematic, Nick's Cube structure, design a single PCB and develop a solution to both simplify the build and strengthen the cube itself.Ĩx8x8 = 512 RGB LEDs. SuperTech-IT has focused on simplifying the hardware side with a single PCB approach integrating and expanding both Kevin and Nick's programming approach with a focus on eliminating all wiring. I leveraged his cube design rather than Kevin's. Nick Schulze has built a wonderful example of note albeit with a simpler STP16 hardware approach and a 32bit chipKIT UNO.
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