georgz
Full Member level 1
Hi i want to use a pic microcontroller to control an array of 50 leds. I'm using two ULN2803 ICs to control the anode and cathode of the leds but
i'm having problems with my schematic because ULN2803 is a NPN transistor array and i can only sink the voltage and not supply it. Is there any PNP array
IC?
This is the schematic for one led but it doesn't work. The IC1 can't sink the voltage when i apply voltage to the input.
i'm having problems with my schematic because ULN2803 is a NPN transistor array and i can only sink the voltage and not supply it. Is there any PNP array
IC?
This is the schematic for one led but it doesn't work. The IC1 can't sink the voltage when i apply voltage to the input.