[PD] Arduino, any feedback to help me choose the model?

[Pierre Massat]

I have bought a 4.7 K pot yesterday, it's working perfectly. The guy at the
shop said it didn't really matter as long as i stayed within the 1K - 10K
range. I'm gonna strat building a real interface around the board pretty
soon.

Pierre

2011/4/28 Richie Cyngler <glitchpop at gmail.com>

> Exciting isn't it =)
>
> My understanding is that Arduinos in general are pretty robust (which is
> good because my electronics knowledge is extremely minimal.) I've been using
> 1K pots with no problems at all. LEDs are another good place to start
> because they are cheap and easy to see when they are working. Good luck!
>
> On Wed, Apr 27, 2011 at 5:28 AM, Pierre Massat <pimassat at gmail.com> wrote:
>
>> Hi,
>> I just got my Uno in the mail today. It's so cool! I'm all excited.
>> I've been searching their website for some basic info regarding he
>> components i should use, but haven't found anything.
>> Do you know if i could use just any pot? Or is there a specific value i
>> should use? Also, can i use a battery for power?
>> It seems like their tutorials are mainly about programming the boards, and
>> not so much about interfacing them with the real world. And as of 2011 Tron
>> is still just pure fiction, and guess what, i'm still plain real.
>>
>> Thank you all very much for your advice!
>>
>> Pierre
>>
>>
>> 2011/4/16 Martin Peach <martin.peach at sympatico.ca>
>>
>>> On 2011-04-16 07:09, Pierre Massat wrote:
>>>
>>>> Hi,
>>>> I just ordered a Uno, i think it will suffice.
>>>>
>>>> Martin, I'd like to replace my pot with an optical sensor if it's
>>>> quieter. Only i've never used one. How does it work? How do i put this
>>>> in the pedal?
>>>>
>>>>
>>> I got a reflective sensor which consists of an IR LED and a photo
>>> transistor in one package, with both components facing in one direction like
>>> the Vishay TCRT5000L:
>>>
>>> http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=751-1034-5-ND
>>>
>>> You put a 10 kOhm or so resistor to 5V on the collector of the transistor
>>> (bigger resistor = more sensitivity but adds noise) and a 330 Ohm resistor
>>> from 5V to the anode of the LED (smaller resistor = more sensitivity but
>>> don't burn out the LED), the other two pins to ground. Then connect the
>>> transistor collector to an arduino analog in.
>>>
>>> Mechanically, mount the device so it's looking up at the underside of the
>>> pedal and adjust things until you get a good range of values. It may help to
>>> stick some reflective material on the pedal, for greater sensing range.
>>>
>>> These kinds of sensors are used a lot in printers to detect paper, so if
>>> you pull apart old printers that's one thing to look for, besides the
>>> motors.
>>>
>>> Martin
>>>
>>>
>>
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>
>
> --
> Richie
>
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