hello forum !
i have bought an led matrix 8x8 display but couldn't find its datasheet how much current should be supplied to it i tested few leds by supplying 5v through 220ohm resistor they have enough brightness.according to this arrangement i am supplying 22mA to led is it ok ?or what should be prefereable current
thanks
You can actually use the peak current value of the LEDs if you use MUXing to get more brightness.
The following is from a Cree LED abmer color datasheet : **broken link removed**
Note:
1. For long term performance the drive currents between 10mA and 30mA are recommended. Please contact CREE
sales representative for more information on recommended drive conditions.
2. Pulse width ≤0.1 msec, duty ≤1/10.