Thursday, April 08, 2010
This is an example application of using the previously-mentioned 8-slider thingy. An analog waveform can be changed by changing the position of the sliders. The sliders represent the shape of the waveform. This is achieved by multiplexing the resistance of each slider in sequential order, then outputting to a voltage divider. An 8-way analog multiplexer is used, as well as a binary counter and a simple square wave for timing generation.
The schematic is given below. Note that the pots are incorrectly labeled as 10k, although 10k pots are fine.