I want to use 1-inch & 2-inch 7-segment display in a digital clock based circuit(six 2-inch display in a row & six 1-inch display in another row). I am using 74hc164(serial in parallel out shift register ic) for controlling 1-inch display.Data, clock and reset pin of 74hc164 is controlled by PIC microcontroller. QH pin(13th pin) of the ic is given to the data pin of the next shift ic and goes on. Since the forward voltage of 2-inch display is 9.6v, 74hc164 cannot be used(6v max).I got CD4015 with similar properties of 74hc164 and works well on 12v.
My question is, how can I connect the clock and data pins of 74hc164 to cd4015 since the operating voltage is different?.
please suggest a solution for this...
Thanks and regards, Nikhil