8 step keyboard sequencer
Вставка
- Опубліковано 9 тра 2024
- My take on an Arduino-controlled analog sequencer design from Look Mum No Computer. I added a zero gate, a time reverse switch, step disable switches, and selectable sequence lengths and patterns. I also drilled 67 holes. Well, 68, really, but who's counting?
00:00 Intro
00:53 Drawbacks of digital
02:26 The build
04:10 Demo
11:04 Wrapup
LMNC video: • ARDUINO 8 STEP KEYBOAR...
Additional info: www.lookmumnocomputer.com/pro...
GitLab repository for my version's schematics, code, etc.: gitlab.com/rsholmes/8StepSequ...
Music: Ringtone by Rich Holmes
Image credit: Clusternote (CC BY-SA 2.0 creativecommons.org/licenses/...) - Навчання та стиль
Excellent channel! Great content! Fantastic documentation! I love the fact that you also Publish the kicad files! Keep it up!
You can't imagine how happy i am that there are people like you sharing all this with us!
Could you theoretically make more rows or cv outputs?
I don't see any problem adding more rows to drive more CV outputs - other than getting them all to fit on the panel.
@@analog_output i was thinking about making a row for vca amount
And one for filter freq amount.
@@hermeslarima9136 Go for it! Use smaller knobs and buttons to get all the rows in. I'll be interested to see the final product!
genius! i think the only thing i'd change/add, is to add the "double mode" also as a momentary "latch button" (active only while pressed), to come up with quick fills on the fly. loved the "double mode" sound
Very Awesome!!!!!
Great 😊
I bought an Arturia kekystep, and now I understand why it can force you to make your own project for sequencer :D
Great video, nice to see this in action. Is it possible to break out the double setting as a switch so you could double up one of the other shorter step sequences, or even make it a double / triple / quad type dial?
Excellent question. It's possible but... The main problem is that in the current design, every one of the Arduino Nano's input pins is used, so there isn't a simple way to add a new switch. (In fact just adding the length/pattern rotary switch required freeing up a pin, which was possible because if you think about it, the Reset switch/input and the first arcade button do exactly the same thing and can use the same pin.) I thought about it and considered changing the arcade button wiring to make it more like an old school CV keyboard putting out a single analog signal instead of reading it as eight digital signals. That would free up seven pins. Another approach would be to use a multiplexer or shift register to read multiple inputs on a single pin. In the end I decided against trying to do either because of the second problem, which was panel real estate - I couldn't see adding anything else on a 40 cm wide panel without using smaller buttons and knobs and squeezing everything closer together, and I didn't want to do that, nor did I want to make the panel even larger.
@@RichardHolmesSyr thanks, I appreciate the reply, I studied the schematic for this as I had no idea how you'd squeezed the input selector onto a single pin, so yeah I can see there's no spares. It's an excellent sequencer as it is, and more than enough for a noobie like me.
hey great job!!! I have modified my baby8 (LMNC) with your version. Only one thing. I don't understand why it seems that the cv range is little; obviously, I don't think that this problem depends of your work. Probably it's my fault. Do you know what can I check?
Sounds like a 🎷! ☺️ Nice work! I like to build cmos sequencers in case you’d like to take a look.
Can you hold it for a moment. Have to go shopping before the shop is filled with people. And before I go, I am building the MFOS 32-step sequencer and am waiting for a pcb to Thomas Henrys 16-step. Henry’s sequencer has two rows of potentiometers where the second row may be used to control a VCLFO that in turns generates clockpulses to the sequencer, but else lacks many of the nice functions of Ray Wilson’s 32-step.
BUT, the logic controlling, especially MFOS’ sequencer is rather complex and using an Arduino could definitely simplify matters a lot.
Anyway, gotta go (walk; doing my 3 km a day walk). Back soon or in Puh language Bakson.
Maybe I should have added something like .... fiddling with a simple VCLFO or rather a VC-pulsegenerator to clock Thomas Henry's sequencer. A 555 where the timing resistor is replaced with a vactrol sems to do the job.
And a nice and gentle person gave me one of these: ua-cam.com/video/lK1IrSWit1k/v-deo.html.
great module, thanks for sharing your enhancements. Is there a reason to use the external voltage regulator vs the nano's internal one? curious if this reduces noise or something else? I normally just put +12 into the nano and haven't had any issues, thanks Rich!
I debated that, and decided since there were quite a few outputs and who knows what they'll be plugged into and so how much current they'll draw, I'd play it safe and use the external regulator. Just being cautious, perhaps overly.
Hello, ...whether it is possible if you have two of these 8 step sequencers then connect them together and then get 16 steps?

thank you for sharing it's great! :)))
I just finished mine. Everything seems to work, except the rotary knob.
It doesn't select the number of steps normally, it's a bit random ...
I will try to find the problem tomorrow. If anyone has ever had this kind of problem, I'll take some info;)
If you can't figure it out drop by lookmumnocomputer.discourse.group/t/8-step-arduino-sequencer/467 and ask there, you'll get help!
thank you for your answer!
everything is okay!
I had doubts about this rotary button that had been hanging around in my closets for a long time, I replaced it with another one and now everything seems to work perfectly well! :: )
thank you again for sharing!
Functions available in addition to LMNC
made me want to build it:)))
What is the difference between reset and zero? I can't seem to figure it out. Looking to make this and wondering if I should ditch the zero step. Trying to get it in eurorack, so saving space is helpful wherever I can.
Reset actually does the same thing as pushing the first button. It goes immediately to the first step, sending out the 1st step's CVs and a step 1 gate. Zero sets the CV to zero and turns off all gates, then it'll go to step 1 on the next forward clock pulse or the last step on the next backward clock pulse. If you have to keep one of the two I'd recommend zero (especially if you keep the buttons, but even if you don't).
So could you go out of a step gate into zero to shorten the sequence the same way you could with reset?
@@clarkwright3404 Zero stops the sequence and turns gates off until a clock pulse comes in; reset resets the sequence to step 1.
Does the arduino directly send CV to the output?
In each of the eight stages, the Arduino supplies 5V on a digital pin to two pots wired as voltage dividers. Each wiper voltage is connected via a diode to a 1k resistor common to all stages which connects to the CV output jack.