wikkid
Newbie level 6
I have only been learning electronics for about 1 month or so and am stuck on what i believe to be a simple problem for anyone experienced.
I am trying to multiplex 4x 4inch 7 segment displays from a PIC 16F627/8 microcontroller.
It all works fine on my small test circuit with a 0.5 inch common cathode 7 segment display. What i can figure out is how to provide enough current to drive the larger display. From 12v, i need to use a 800 Ohm current limiting resistor and a transistor (BC550), but how do i configure the multiplexing to switch on each display one by one?
I have included a sketch of what i expect, but can someone please help?
Thanks
Wayne
I am trying to multiplex 4x 4inch 7 segment displays from a PIC 16F627/8 microcontroller.
It all works fine on my small test circuit with a 0.5 inch common cathode 7 segment display. What i can figure out is how to provide enough current to drive the larger display. From 12v, i need to use a 800 Ohm current limiting resistor and a transistor (BC550), but how do i configure the multiplexing to switch on each display one by one?
I have included a sketch of what i expect, but can someone please help?
Thanks
Wayne