[Coco] Artificial Intelligent (AI) Opponent

[Dave Philipsen]

Cool. So the feedback on the fire nozzle was some sort of flow sensor? And I’m eager to know how you would have incorporated a PID loop into a garage door opener!

Dave

> On Jan 2, 2018, at 7:23 AM, John Mark Mobley <johnmarkmelanie at gmail.com> wrote:
> 
> David,
> 
> My first work with PID was controlling a fire nozzle tester.  I could
> control a valve to a position (0 to 90 degrees) that controlled the flow
> from (0 to 500 GPM).
> 
> Then I worked on a garage door opener.
> 
> Then I worked on a turntable rpm speed control for a coin sorter.
> 
> -John Mark Mobley
> 
> On Jan 2, 2018 3:33 AM, "Dave Philipsen" <dave at davebiz.com> wrote:
> 
> 
> On Jan 1, 2018, at 9:45 PM, Allen Huffman <alsplace at pobox.com> wrote:
> 
>>> On Jan 1, 2018, at 8:49 PM, Dave Philipsen <dave at davebiz.com> wrote:
>>> 
>>> Hey, I noticed you referenced a PID controller.  What was it used for?
> I wrote a PID control about 27 years ago for a 6502 board that ended up
> controlling hydraulic cylinders in the animatronics characters in the ET
> dark ride at Universal Studios Florida.
>> 
>> Very cool, Dave. I got to see your work a number of times, then! Who did
> you do the work for?
> 
> At that time I was contracted by Triad Productions out of Des Moines, IA.
> The animatronics characters were designed by a company called Creative
> Presentations.  All of the analog movements were controlled by hydraulic
> cylinders with linear feedback potentiometers.  The controller received
> position information from the show control computer and used a PID loop
> applied to the feedback from the pots to more accurately control the
> movements.
> 
>> 
>> 6502 assembly, I assume?
> 
> Yes.  As I recall, a typical 4 MHz 65C02 (Rockwell) ran PID logic for up to
> 32 analog hydraulic valves.
> 
>> 
>>       — A
>> 
>> 
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