 LED Matrix power

Hi,

I want to control a white LED Matrix 12*8 by arduino. what are the possibilities to power this matrix? I’m going to design an ac/dc power supply (Transformer, rectifier and an IC voltage regulator) for powering the arduino (9V or 12V)

The first thing is to calculate the current required of the supply. How many LEDs can be powered at once? What is the current for an individual LED? What else needs power aside from the Arduino? Add 80 to 100mA (very conservative) for the Arduino itself. And please consider a switching mode power supply. They are much more efficient and smaller in size.

I want to power the matrix at once. Each LED drops 3.4V and a current of 20 mA is passing through each column formed of 8 white LEDs so for the total matrix there's a 440 mA current intensity plus the 80 to 100 mA.

MrElec:
I want to power the matrix at once. Each LED drops 3.4V and a current of 20 mA is passing through each column formed of 8 white LEDs so for the total matrix there's a 440 mA current intensity plus the 80 to 100 mA.