PhilKey

If you want to use 74hc595 you definetely also have to modify the Code and replace all the TLC Library stuff, the schematic and code for the Bluetooth Code does not have to be changed.To modify the schematic in order to use your Shift Registers you have to look at other LED Cube Instructables

The 74HC595 is only a Shift Register, its ouputs are not able to provide enough current to drive the amount of leds used here.You would have to connect the outputs of the Shift Registers to Transistors and then to the LEDs, but this would make the Schematic much more complicated and also the TLCs offer the possibility to dim the LEDs, which the Shift Register do not have

Hi there,I just recently started working on an updated version without using the MSGEQ7 and instead using the FFT sketch, but it is not finished yet.I will update this instructable when I have the time to finish it

So the WS2812B LED strips and the Arduino Nano need 5V, so you would have to use a DC Step Down Converter to convert your 14V to 5VFor this you could simply use a LM2596, like this one:https://aliexpress.com/item/890333309.html

Yeah of course, you could just have 3.5 Audio Jacks, all are connected, 1 is the Input and the other 2 are parallel Outputs, so you can connect 1 to the MSGEQ and 1 to an Amplifier

Why not?

Pin 5 is connected to a single Audio Channel (Either left/right, not much of a difference). You simply leave the other channel not connected to anything.Now Pins 1,2,6,8 are not connected to the Arduino. Pin 1 and 2 are connected to each other over a non-polarized (e.g Ceramic Capacitor with 100 nF), with Pin 1 also being connected to VCC (+) of the power supply, and Pin 2 to Ground (-) of the power supply.Pin 6 is simply conencted over a 100nF (non polarized) capacitor to Ground(-)Pin 8 connects to VCC(+) over a 200k Ohm Resistor and over a 33pF (non polarized) Capacitor to Ground(-).

Yes of course, you wouldnt event have to change the pin assignment

Upload the "Cubo_Control.ino" file to the Nano. Its in the RGBCube_Arduino Github Repository

The pins D2 and D12 are not used. I just labeled them in the .pdf schematic but I did not wire them to anything

Just to be clear if you wanna make a 8x8x8 LED Cube instead of my 6x6x6 you need to calculate for 8x8x3(Colors) x 20 ma= 3.84A, so for that you should indeed use a 5Amp power supplyThere is no real need to add a switching circuit since you can switch between all animations and also the audio mode with the Bluetooth App "Cubo" I provideThe audio visualizer mode is just using the msgeq7 which is directly wired to the arduino for processing the audio. The 4th Animation in the 2nd row of the Cubo App Image is the audio mode

In general all RGB LEDs draw ~20mA max. for each color when on full brightness, so it would be the same calcuation for your LEDs as for mine. So since the cube is multiplexed at maximum only one entire layer is switched on at a time, so that results in a current draw of 6x6x3(3 colors) x 20mA = 2.16A. Obviously you need some more for the Arduino + the Bluetooth module, but even 2.5A should be sufficient. The output current for the LEDs is also limited by the TLC5940 drivers, so your 10amp power supply is more than enough for the cube.

The problem is that the TLC5940 is strightly for common anodes, so you would have to find an alternative LED Driver IC also meaning you would have to change the code since you cant use the TLC5940 library. What would be possible is to still use the TLC5940s but you would have to put a PNP Transistor on each of the TLCs output to change it from an current sink to current source. You would also have to change the MOSFETs since they would need to provide current sink instead of current source as done here.You can have a look at the MAX7221 which is an LED Driver for common cathodes, but its working slightly different:https://www.maximintegrated.com/en/products/power/display-power-control/MAX7221.html

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