4# How to Code Potentiometers (Complete Guide) - MIDI Programming for the Arduino

[@ronzonmusic]

I have been searching for exactly this forever, this video is perfect timing. Thank you!

[@NerdMusician]

Awesome!

[@tawobols]

Thank you so much! With your help and all your content I was able to start working on my first midi controller for my Tibetan bowls project with a captive touch sensor. So many tips in your videos! I'm really very grateful to you 🙏🏼

[@NerdMusician]

Great to hear!

[@matsukadub-official]

i've paid for the online course and also find it super cool and nice that you also post those videos for everyone to enjoy ;-) !

[@NerdMusician]

Thanks, man!!

[@genghisbunny]

Your lessons are so useful, thank you. One day I might be able to afford your course, but in the meantime I'm enjoying your videos, and appreciate them.

[@NerdMusician]

Thank you so much!

Me encantan tus videos, son muy estimulantes, por favor no pares!

[@LostID_r2d2]

Many thanks man! really appreciate you way of teaching! would considere going advanced after se all your posted stuff and test a little bit prototyping.

[@londondirt1217]

I’m loving the new content dude ❤

[@NerdMusician]

Glad you liked it! I'll keep doing more coding stuff. :)

[@pabloivan6017]

THX for the video. Easy & fast way for DIY MIDI, also cheap.

[@Nightsbringer1]

Just found this video series and I'm very impressed honestly. Will you add something on adding multiplexers as I'm rather confused as how to do that!

[@cyrilcalmes4208]

Excellent video. Just one question, could we use interruptions to deal with faders ?

[@80s_GILA]

Im trying to build a controlller for Rekordbox but is doesn't seem to register the controller. Am i doing something wrong or doesnt rekordbox allow custom controllers? *edit* the controller is gonna be a add-on to a DDJ-FLX4

[@ludovicamennella882]

this is super useful!! can you also make a video about buttons made of forse sensitive resistor or piezo to control velocity? thank you so much!

[@NerdMusician]

It’s in my todo list!

[@TheTekordBay]

Amazing channel!

[@deividsoneduardokling]

Boa noite amigo. Já tem alguns meses que estou tentando usar o Arduino uno pra fazer um octapad para meu filho de 12 anos que é baterista. Mas não consigo fazer o Arduino controlar midi no maços. Em outros videos mais antigos VC até mostra como usando o hairless midi. Mas não consigo mais instalar no maços Monterey. Tem alguma dica? Queria que o Arduino uno que tenho em mãos, controlasse o kontakt

[@shambhavi-nw4fd]

i connected 8 potentiometer to a 16 channel mux, how to code for that

[@andreasfurxer4135]

Hello, I am using an Arduino Leonardo, and I have installed 4 potentiometers and 3 buttons, adapting the code accordingly. Everything works smoothly so far. However, the potentiometers do not behave as I would have liked. Unfortunately, the control range of the potentiometers is very short. When I set the potentiometer to about 60 percent, the MIDI value is already at 128. I am using a 10K fader as a potentiometer (128mm). Is there any way to adjust this control range? Best regards from Austria, Andi

[@pulsmond]

Help me figure it out: Ableton Live does not see the connected controller before launching Ableton. If I turned on the controller after starting Ableton - everything is fine, everything works. Why is that?

[@scepticore]

Does the resistance of a poti matter in that case?

[@NerdMusician]

It matters more if you use different values, because it will give you different curves, but just stick from 5-20Oohms. 10Ohoms is ths standard.

[@DanTechGA]

I'm having an issue at compiling in the loop. I get ""controlChange" was not declared in this scope." Any idea why? I love the video, but I'm stuck!

[@nadien.6438]

Hello! im having trouble usingthe code with the arduino mega ch340 atmega 2560... does it has to do with the micrchip?

[@Lugubrisimo]

Lástima que el daw reaper no bo lo reconoce y siempre veo que prueban en Ableton

[@dabinjung5684]

Can I also use slide potentiometer instead of this?

[@raphanunu6912]

Of course. Simply take care of the pot curve, linear, log or anitlog.

[@s.h.a.m.r.i.k]

Midi 2.0 support?

[@pierrebertram5555]

Would it be kind of the same process in Linux ?

[@NerdMusician]

I believe yes.

[@linzenmeyer]

How to code joysticks How to code Touchpads How to code Sliders How to code readouts and light strips These are all the ideas I could think of. And to sweeten the pot for you, I will send you boxes of gear for you to use in those videos. Get with me, I believe all my contact info is in my youtube.

[@timeubank4687]

Joysticks are just two pots. X and Y

[@patrickburke3826]

🙏🙏🙏🤓

[@NerdMusician]

\o

[@jozefsoucik3115]

0, 127 (128 states) ...not 0,128 ...because 0-128 is 129 which not 8 bit but 8bit + 1

[@NerdMusician]

If I said that it was just a confusion, you are right.

[@jozefsoucik3115]

@@NerdMusician I was confused these things so many times...0 is states as others... therefore decimal numbers are represented 0 to 9...not to 10

[@alexcostafotografia]

Brazilian?

[@chrisw1462]

If I couldn't move a CC knob very fine, I'd get rid of the MIDI controller. Your 'threshold' and timer is way too much compensation.

[@NerdMusician]

With this "compensation" I get VERY fine readings. That's how it's done!

[@merumerutho]

Place a capacitor between potentiometer output and ground. It acts as a low pass filter and removes the noise.

[@timeubank4687]

The problem is MIDI. you only get 128 values. there are no decimals. I'm not sure what you would replace a midi controller with to execute midi commands. Getting a multi turn pot that allows fine precision won't do you any good to turn it 6 times to go from 0 to 1, you can get 0 to 1 with any Kb pot just fine.

[@chrisw1462]

@@timeubank4687 When I said I'd get rid of it, I meant because it was malfunctioning. You'd replace it with one that works as it should.

[@chrisw1462]

@@NerdMusician The problem with the code is using the built-in map() function _before_ compensating for changes. Compensating _after_ map(), loses resolution and some control. If, instead, you use a hysteresis function before map(), you can keep the resolution and get even finer control. The ADC read function would save the last reading and compare it to the current one. Then, if and only if the value has changed more than 3 or 4, you call map() and MIDIstate() to see if the MIDI value needs to change. (If it's less, throw out the new reading and keep the old one.) Tune the comparison value (3 or 4) until you are happy with the control. Of course, @merumerutho's suggestion of adding a small capacitor across the potentiometer would also help - both the cap and the code change would make it very stable. A 100 nF (0.1 uF) cap is enough, and should help with local electric field changes, too (no value changes just because you moved your hand).