How many rows and many columns I can build one with an Arduino? I am wanting to set up a screen with high brightness RGB LEDs, the curtain will have 20 rows and 32 columns. Could you help me with this project?
Three pins are addressing (A, B, C), and two are common input outputs, one set ground and the other to source. The chip handles 8 IO, but by switching the common IO pins you double that.
I've not done much more than look at charlieplexing. It looks like a programming headache to me. Hardware and software design have to meet somewhere reasonable.
Three pins are addressing (A, B, C), and two are common input outputs, one set ground and the other to source. The chip handles 8 IO, but by switching the common IO pins you double that.
I've not done much more than look at charlieplexing. It looks like a programming headache to me. Hardware and software design have to meet somewhere reasonable
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How many rows and many columns I can build one with an Arduino? I am wanting to set up a screen with high brightness RGB LEDs, the curtain will have 20 rows and 32 columns. Could you help me with this project?
yougugatube 2 weeks ago
great program it would be excelent if i can see the code please
i need to know how that multiplexer works
maubarr 6 months ago
What's the 5th pin for? 3 pin for A, B, C on the chip and the 4th pin as LEDs sink / photodiode common input.
But I believe with charlieplexing you can light up 20 LEDs from 20 photodiodes from 5 pins, without the CD4051.
McGuywer 1 year ago
Three pins are addressing (A, B, C), and two are common input outputs, one set ground and the other to source. The chip handles 8 IO, but by switching the common IO pins you double that.
I've not done much more than look at charlieplexing. It looks like a programming headache to me. Hardware and software design have to meet somewhere reasonable.
aspro648 1 year ago
@McGuywer
Three pins are addressing (A, B, C), and two are common input outputs, one set ground and the other to source. The chip handles 8 IO, but by switching the common IO pins you double that.
I've not done much more than look at charlieplexing. It looks like a programming headache to me. Hardware and software design have to meet somewhere reasonable
aspro648 1 year ago