Multiplexer and Decoder Implementation For My Digital Clock
This video is a time-lapse of the design process, there is no voice-over.
In the case of a digital clock, a multiplexer is implemented to make use of a single driver for all LED displays. In this video I have used LED displays that have internal drivers, so this defeats the purpose of using a multiplexer, however implementation of such a component is still a good exercise. There is a reduction in bits from 6 inputs to 1 output(each 4 bits). If instead we would have used LED displays without internal drivers we would need have the same input reduction while the bits in the output would be up to 7 rather than the 4. This just means a slightly more complex multiplexer but still possible to design. A decoder is also implemented, this component is necessary for the multiplexer and the de-multiplexer for final display. While we are using the LED's internal drivers this design shows how one can go about making a fully fledged design from the ground up.
Chapters
0:00 Counter for multiplexer and de-multiplexer
1:18 Multiplexer
5:39 Decoder
6:52 De-multiplexer
15:33 Redesign of de-multiplexer