I am multiplexing a 12 volt 7 segment led using a SN74HC595 shift register and a ULN2003 darlington array.
Segments that should be off are dimly lit.
For instance if I am displaying a two A,B,D,E,G are lit as expected but C and F are dimly lit as well.
i have measured the voltage at the input pins on the darlington and pins that should be high are high and pins that should be low are low.
Any help will be greatly appreciated.