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0
votes
1answer
128 views

9X9 RGB Led matrix, design suggestion

I need to drive 80 RGB leds (so 240 individual leds), physically and conceptually aligned as an 8x8 matrix + an additional vertical line and an additional horizontal line. I'd like to drive the ...
2
votes
2answers
301 views

LED hub purpose?

What is the main purpose of LED hub, is it used only for RGB matrices to connect shift registers for every color or there are some other applications? I'm working with HUB75 and that is the reason ...
0
votes
1answer
99 views

Can use 17 resistors with 16 rgb led's?

I always see an rgb led ran with 3 resistors, for example a 20ma led on 5v power uses 150ohm's for red due to it's lower voltage but only 100ohms for green and blue. I am running 6 shift registers off ...
-2
votes
1answer
234 views

are the m74hc595bl and 74hct93 interchangeable?

Im about to put an RGB fader circuit together and it requires the 74hct93. I have quite a few of the 74hc595's. I thought since they are close in name and both shift registers I would ask. 74hc595 ...
1
vote
3answers
2k views

coding using Arduino, two 74HC595 and two RGB LED, problems with shifting out database

the whole point of this was to be able to send 8 bits of color code to 2 rgb leds through 2 74hc595 registers. if i can get the default color for each led to be sent out then the next part of code is ...
7
votes
3answers
4k views

POV globe speed questions

I am planning on creating a RGB LED POV globe only physically larger then that one. I am planning on using 64 RGB LEDs, requiring 3x pins per LED for a total of 192 outputs. Obviously I am going to ...