Hello,
I currently have purchased an LED Matrix, and I would like to connect it with an Arduino Uno. I am nervous about overloading / frying the components.
I am currently thinking of setting up the circuit with the electricity flowing in this sequence (DC Power Supply -> LED Matrix -> Arduino Uno)
Component Specs
DC Power Supply
5 Volts
2 Amps
LED Matrix
5 Volts In (required)
600 mA Maximum usage
What is the maximum current I can put into the 5 Volt Arduino Pin?
Is there a better way to set up the circuit?
Should I buy a different power Supply?
Thanks
What is the maximum current I can put into the 5 Volt Arduino Pin?
Absolute maximum current for any digital pin is 40mA (20mA max to be safe and get near full voltage at the pin). 100mA per port (group of 8 pins) and 200mA for the chip. This is all listed in the mega328 data sheet.
You will need a driver(s) between the matrix and the Uno. What the driver(s) consists of will depend on the matrix. Do you have a data sheet for the matrix that you can share?. Your power supply may be adequate, but without seeing a data sheet for the matrix i can't say for sure.
Do you see a trend there? You should have and read the data sheets for all major components in your circuit before you start wiring.
Sorry I should have elaborated a bit more.
I do not require a driver it is included in the matrix. (HT1632C)
Matrix -> http://store3.sure-electronics.com/de-dp11112
User Manual -> http://cdn2.boxtec.ch/pub/sure/DE-DP11212_Ver2.0_EN.pdf
I am planning on chaining two of these matrix modules together. I will not be using the driver board that is referenced in the manual.
In section 1.2.2 of the manual says "The auxiliary supply should be able to output DC5V 1.5A." (when using 4 modules)