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 glitch...@gmail.com
Exciting
Hi Pierre,
You can use any pot from about 1kOhm to 10kOhm. Less than 1kOhm will
waste power and more than 10kOhm will not be able to charge the
integrating capacitor fast enough, however if you only have one analog
input in use it's probably OK to use much larger values.
And you probably want
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
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
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?
Looks like i'm not nearly through asking questions about arduino...
Pierre
2011/4/10 Martin
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
I've been using the Uno with pduino recently and I couldn't be happier. They
are cheap and really reliable, 6 analogue pins and somehting like 12
digital. So not huge, but still pretty versatile.
Just upload the pduino firmata to the Uno, and in a flash (hehe) you have
signal, and you can spend
Hi all,
I sorry to start yet another thread about arduino, but i'm too lazy to
search the archives and i suppose that they are upgrading the different
models frequently.
I have been using a hacked gamepad-turned-stompbox to control my live
patches, and right now i feel that it's time to build
Hi Pedro, thank you for this quick response.
- Yes, size does matter, because it all needs to fit in a stombox. But the
boards don't seem to be to large anyway...
- Price matters too (i'm not gonna buy the one at at 130 or something).
- What is multiplex? I need something like 12 simple switches
Hi,
Pierre Massat wrote:
Here's what i have right now :
- 8 buttons + 1 potentiometer (in a pedal).
on a regular arduino (25 euros) you get 12 digital inputs (buttons) out
of the box, expandable to 18 if you reuse the analog inputs. You also
get 6 analog inputs (potentiometer). Load up firmata
Beware that analogue inputs (can) have noise (they fluctuate a little).
The analogRead() command converts the input voltage range, 0 to 5 volts, to
a digital value between 0 and 1023.
If you can settle with 12 inputs the Uno will suffice:
http://arduino.cc/en/Main/ArduinoBoardUno
p.s.:
Pierre Massat wrote:
I also saw that the board could power LEDs. This could be very interesting,
Yes, but the Digital Input are shared with the digital outputs. So if
you put a button on a line, you cannot put a led too. You have up to 12
inputs/outputs IN TOTAL. You choose in your program if
Depends on what you want the leds to do. If you simply want them to shine
when buttons are pressed, dont waste arduino code on that. But if you want
them to blink or react to the controller state (hence code) they'll have to
be controlled via some digital pins (in output state) as Goyard stated,
Thank you both for your replies.
I don't think i will need multiplexing.
@Pedro : what do you mean by fluctuate a little? This could be anoying if
they fluctuate too much, because i wanted to use a pot to control a delay
length (you can hear gliches if the delay length jumps from one value to
You can filter out some noise if that happens. I have done several arduino
projects (namely public installations or sculptures with sensors), one thing
I learned is that you can always filter the (some) noise, by ignoring some
values and so forth.
Another fun aspect is that in public installations
Probably the thing will read quieter if the pots are lower resistance.
The data sheet for the atmega microcontroller used in the arduino says
hat the impedance of the analog source should be less than 10kOhm. Also
putting a .1uF capacitor from the analog pin to ground will smooth out
glitchy
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