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"Bart" <bborb@fusedotnet> wrote in message
news:9aeda$44d60d8d$d8442f66$12898@xxxxxxxxxxx
> Hi All,
> I've successfully cascaded 4 of the 74LS193 binary up-down counter chips
> to count up to full, off a 555 oscillator. Now I'm stuck. I want the
> circuit to count to full and then count back down to zero and continue
> this cycle endlessly. I've googled my flanges off and can't find a circuit
> where this is done. The datasheet brags that this is the advantage of this
> chip that it can be cascaded without additional elements so I was sure I'd
> find where someone had done this before but I'm googled out.
> Any help is greatly appreciated,
> Bart
Thanks so much for everyone's replies. Whew, I'm getting great info from
you people. I've probably got every electronics book I could find from "Half
Price Books" and also Googled till my eyes were bloodshot but this group has
been critical to my successes on many projects.
I simulated many configurations with cascading the 74LS193 up-down binary
counters and hit on this design that does what I'd hoped.
http://home.fuse.net/consultec/74LS193.jpg
I'll try and breadboard this first chance I get, I don't always trust
simulators.
Bart
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