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IKEA Ribba Word Clock
Oak & Acrylic Nixie Clock
To answer my own question - I replaced the 300K ohm resistor with a 470 ohm one and the LEDs burst into life.
Thanks. I set up the Ardunio Mega last night with the other components and connected the LED board to it. Despite having good continuity from the Arduino power output to the LED rails and confirming that my data pin was connected well to the Arduino via the resistor, I couldn't get any LEDs to show using the Adafruit test code. A little baffled as to what could be the problem. I shall persist...
I just noticed that that the Arduino code screenshot says to use a 300 to 500 Ohm resistor between the Ardunio Pin 6 and the LED strip data line, but you say to use a 300K Ohm resistor. So is it 300 or 300K?
Thanks for your comments. I will review the instructable and write in a section on power management. The USB cable is hacked to take a feed from +5V and Ground from USB to the power board with the capacitor on as taking it straight from the Arduino was never an option. I ran tests on the code and animation I wrote and the pull never exceeded 0.5A. You're dead right, if you run every LED at full brightness, that 60ma per LED, it soon adds up and 3A power supply would be required. However, I used a USB power meter while I wrote the code to ensure I didn't have silly power requirements. I'll knock together a schematic when I get a minute and update.
Also, would some more consideration be required if it was desired to light all the LEDs (assume I've modified the code to add some animation). Looks like all 144 LEDs will require close to 3A.
Would it be possible to see a higher-level diagram of how you connected the LED strip to the Mega? It looks like the wires from the LED strips aren't showing in the image where you show the breadboard. I am guessing that the Arduino is getting power from the USB connector, which you then feed out to the breadboard via those side-by-side wires?The LED strip + and - wires then go into the vertical rails similar to the capacitor, and the data line from the LED strip goes to the right-hand side of that resistor. Am I correct?With my clock, I've already connected all the LED strips together with the wire bridges. Will powering the Arduino via the USB port be enough juice to light all the LEDs or should I power it via the input jack as well?
Would it be possible to see a higher-level diagram of how you connected the LED strip to the Mega? It looks like the wires from the LED strips aren't showing in the image where you show the breadboard. I am guessing that the Arduino is getting power from the USB connector, which you then feed out to the breadboard via those side-by-side wires?
IoT Gauge with Arduino, Yaler & IFTTT
Arduino desk Fan Controller
The only suggestion I can think of on how to improve this, is include a schematic on how you wired up the LED strip to the power / arduino etc
Well, I found this guide to be amazing, so I've bookmarked it and later I'll be re-reading it.
Word Clock 2
Incredible ! Very nice nixie clock
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