Re: The death of combinatorial logic.
- From: rue_mohr <""dan\"@(rue_mohr)">
- Date: Mon, 31 Jul 2006 08:27:59 -0700
sorry, is it a stepper motor you wanted to requence?
you only need 3 chips to sequence 2 motors (7474 x2 and 7486)
but I agree you can do a lot more with a microcontroller, which puts me in the same situation, literally hundreds of logic chips that are much bigger and limited than a microcontroller, its to the point where I can barely put togethor a 555 circuit without thinking about the stability I would get with a tiny13 and crystal, along with being able to do much more than simple timing. If you have the tools and can bang off the code fast, its no competition.
dan
Tim Polmear wrote:
Not wanting to spend $40 bucks a robot on UCN5804B controllers I.
thought I'd make a controller with FETs and discrete logic, using the
circuit from kitsrus.com. It was only as I started laying out the
tracks for the AND gates to modify the circuit so that it could idle
without running power through the power FETs that I thought "This is
crazy, 6 ICs to do the job of 2. I can run these FETs straight from a
PIC".
So I ditched the XOR gates, the AND gates and the NAND gates with
Schmitt triggers and designed the circuit round a single PIC that I'll
get running with software.
Now what do I do with all my chips?
____________________________________________________
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