Hello All,
I am currently designing an LED array. It consists of 20 LEDs which will light up one at a time in sequence. The first design looked something like this with the switch array representing logic 0 outputs on micro-controller:
I need to ensure that the intensities are controlled however using a constant current method. I have decided upon this design which uses a shunt regulator to maintain required current through LED:
The problem I am having is that I cannot come up with a suitable way of replicating this design x20 times over, short of just using x20 of each components. Any ideas? MUX's are expensive no?
Regards,
VEYS