[time-nuts] FE-5680A Mechanical Question

[Don Latham]

Incredible! Thanks for the tip. The Arduino has a PID controller already
written as a library function.
Don

Chris Albertson
> I've found yet another good way to get data into a computer.
> Sparkfun sells a bundle with an Arduino and a student copy of Labview
> for $50 total.   All the analog and digital pins are pulled into
> LabVIEW and then you can drag and drop the signals into processing
> blocks and connect those to graphs and plots.   It's a very painless
> way to connect a graphic object on the computer screen to a pin on a
> uP.   Labview is not a permanent solution but it's a quick way to
> experiment and build a sophisticated PID controller without writing
> any code.   Then later write it in C and burn into the Arduino.
> Using Arduino costs more but I don't have to make a PCB and you can
> buy one the $20 on eBay.   Also it would be very easy to add an
> Ethernet interface and SD card for data logging.  You might say
> Ethernet and SD cards are to complex.  But, no they plug in like a
> Lego block and don't cost much
>
> On Fri, Jan 13, 2012 at 9:50 PM, Peter Bell <bell.peter at gmail.com>
> wrote:
>> I think lots of people have designed MCU based HPIB interfaces - the
>> problem is that most of them are, like mine, designed to solve a
>> specific
>> problem and there is no subsequent incentive to clean up the
>> documentation
>> to the  point where you wouldn't be embarrased to release it to the
>> public
>> - at least that's the state mine is in...
>> On Jan 14, 2012 8:35 AM, "Jim Lux" <jimlux at earthlink.net> wrote:
>>
>>> On 1/13/12 3:46 PM, Chris Albertson wrote:
>>>
>>>> On Fri, Jan 13, 2012 at 3:18 PM, Jim Lux<jimlux at earthlink.net>
>>>>  wrote:
>>>>
>>>>> On 1/13/12 2:51 PM, Chris Albertson wrote:
>>>>>
>>>>>>
>>>>>> $150 is $130 more than $20.   It depends on if an ISA type
>>>>>> computer
>>>>>> shows up for free.  I'm having doubts that one will.  They seem to
>>>>>> have become valuable.  The machine would need to be at least a
>>>>>> Pentium
>>>>>> II so it could boot off the network and then mount some disk
>>>>>> space.  I
>>>>>> know what you mean about maintenance so i don't want any disk
>>>>>> inside
>>>>>> and no OS installed.
>>>>>>
>>>>>> I'm surprised that no one has built a GPIB controller from a uP.
>>>>>> Electrically the GPIB is simple and slow by modern standards.
>>>>>>
>>>>>>
>>>>> That's exactly what the Prologix is... a microcontroller that
>>>>> implements
>>>>> IEEE-488/GPIB with a command interface (serial port emulation with
>>>>> USB)
>>>>>
>>>>> Maybe what you mean is "why has nobody published a design and
>>>>> software
>>>>> for
>>>>> free?"
>>>>>
>>>>
>>>> I've been Googling,....
>>>>
>>>> Yes there is a free published.  It appears to be the very much like
>>>> the Prologix.  The Prologix was the next iteration of this design.
>>>> http://lpvo.fe.uni-lj.si/en/**raziskave/elektronika/**
>>>> podatkovni-in-merilni-**vmesniki/<http://lpvo.fe.uni-lj.si/en/raziskave/elektronika/podatkovni-in-merilni-vmesniki/>
>>>>
>>>>
>>>>
>>> Fascinating.. so basically, by spending $150 you save whatever time
>>> you'd
>>> spend buying the $50 worth of parts (which might be more by now) and
>>> assembling it.  Seems a nice way to cover both ends of the user
>>> spectrum.
>>>
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>
>
>
> --
>
> Chris Albertson
> Redondo Beach, California
>
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-- 
"Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind."
R. Bacon
"If you don't know what it is, don't poke it."
Ghost in the Shell


Dr. Don Latham AJ7LL
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