[HELP] 74ls193 count up and down as BCD

Wendy

Joined Mar 24, 2008
23,421
Sorry, lost track.

Here is a project I never finished. The robotic combat club basically folded up while I was working on it, the part you are interested in is sheet 3.

The basic counter was tested on a breadboard. You will note two RC circuits with different time constants, this was to feed pulses in a controlled sequence to make it load the presets the way I wanted them to.
 

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