I'm building an led sequencer from 13 cascaded cd4017s driven by a 555 timer. The outputs will go to a bank of pins that will take flying sockets from the led display boards. In this way I can change the sequencing of the displays by moving the socket connections along the pin bank. As I will be using multiple displays of rgb leds each output could be driving up to 12 uln2803 inputs. I am proposing to use bc548 transistors as emitter followers to interface between the cd4017s and the uln2804s. Does this sound feasible? I was not intending to have Base resistors and rely on the uln28034s to provide the load.
I thought of using tc4427 line drivers but they would be too expensive as I would need more than 50 of them.
I thought of using tc4427 line drivers but they would be too expensive as I would need more than 50 of them.