Hi,
I am creating a device similar to the one on the link above except I will be using a PIC chip to control the transistors to create special patterns.
One problem I've run across is that if I activated the top transistor on the side and all of ones along the bottom (to turn on the LEDs on the whole top row) how would I then turn on just one LED on the second row? Surely activating the second transistor down will allow the entire row to light because of all the bottom transistors being active?
I'm guessing that either I've gone wrong somewhere (fairly likely
) or that I'm going to need some kind of multiplexing system.
Any advice would be greatly appreciated!
I am creating a device similar to the one on the link above except I will be using a PIC chip to control the transistors to create special patterns.
One problem I've run across is that if I activated the top transistor on the side and all of ones along the bottom (to turn on the LEDs on the whole top row) how would I then turn on just one LED on the second row? Surely activating the second transistor down will allow the entire row to light because of all the bottom transistors being active?
I'm guessing that either I've gone wrong somewhere (fairly likely
Any advice would be greatly appreciated!