Hi I've got an 8x8 LED matrix driven by the Arduino Mega and 8 74HC595's. There is no resistor between the 74HC595 and the LEDs. I measured the current and they receive ~20mA at peak brightness which is exactly what the data sheet suggests. This is when I have just one LED on in the shift register. …

Help with increasing 8x8 LED Matrix brightness

system May 4, 2012, 1:02am 7

Yes, current flows from anode to cathode. All the anodes are connected to 5V (logic-1) when they are turned on and the cathodes are connected to a MOSFET's drain.

Topic		Replies	Views
pixel brightness of 8x8 led matrix display is low LEDs and Multiplexing	8	2712	May 6, 2021
LED Matrix Dimming LEDs and Multiplexing	17	7885	May 6, 2021
getting started in shift registers LEDs and Multiplexing	4	1582	May 6, 2021
Controlling LEDs brightness individually using one 74HC595? LEDs and Multiplexing	3	787	May 6, 2021
Led matrix brightness control with uln2803 LEDs and Multiplexing	19	7070	May 6, 2021

Help with increasing 8x8 LED Matrix brightness

Related Topics