Hi all, I'm trying to create a matrix of banks of led's. These banks of led's are 6 led's hooked up anode to cathode that use up 2 volts per Led (12v per bank) with a 1ohm resistor at the end of the bank.
Now I can't use the Arduino to supply the voltage, but I can use it to switch the matrix on and off. I'm using an NPN transistor at the ground end of the bank, but I do not know what transistor to use at the source of the bank to do the on/off switching. I've tried a few things, I even blew out my port #3 because of the 12v going to that pin oops!!! :o
Can someone please help me solve this problem I'm having (I'm new to electronics and just want to tinker around).
I hope this all made sense.
Thanks in advance.