I was looking at a Velleman kit, the MK173, which is a variation of the "Knight Rider" effect. What's interesting to me is that it uses three pins to control six LEDs. What's this technique?
Original is in this PDF: http://www.vellemanusa.com/downloads/0/minikits/manuals/manual_mk173.pdf
I can see how LEDs 1, 2 and 3 go on when the pin goes high. But how do LEDs 4, 5, and 6 go on?
Original is in this PDF: http://www.vellemanusa.com/downloads/0/minikits/manuals/manual_mk173.pdf
I can see how LEDs 1, 2 and 3 go on when the pin goes high. But how do LEDs 4, 5, and 6 go on?