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Some simulation demos curtesy of Holger Vogt and a new board design curtesy of Pat Deegan |
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| .. | ||
| README | ||
| state-3bit-count.in | ||
| state-machine-3b-count.lib | ||
| up-down-c.kicad_pro | ||
| up-down-c.kicad_sch | ||
| up-down-c.wbk | ||
| up-down.kicad_sym | ||
Up-Down Counter This project contains a home-made symbol, a home-made subcircuit counter model, and a mix of digital and analog nodes. The subcircuit counter model is made by the built-in ngspice/XSPICE state machine. This is a very simple method to run a programmable sequencer. The 'program' is contained in file state-3bit-count.in. Please see chapter 12.4.18 'State Machine' of the ngspice manual for more information. The digital nodes of the state machine are interfaced to the analog world by D/A bridges. When plotting the output, we use User-defined signals to allow plotting of multiple signal vertically without overlap, thus emulating multiple panes.