Casper Electronics DIY synth building. Part 2: Sequencers
Вставка
- Опубліковано 8 лип 2024
- The OMSynth is now available for purchase!
Along with kits for this video: noise.kitchen/143-omsynth
More info here:
bastl-instruments.com/instrum...
Learn how to make a variety of musical pattern sequencers using a few common electrical components and a breadboard.
This video is part 2 in a 3 part series.
PART 1: building oscillators.
• Casper Electronics DIY...
PART 3: Lo-fi sampler.
• Casper Electronics DIY...
Get more info, schematics and drawings for the circuits shown in this video here:
bastl-instruments.com/support...
MORE LINKS BELOW!!
MATERIALS:
-CD40106 hex schmitt trigger IC
-CD4040 binary counter IC
-CD4051 8 channel multiplexer IC
-1k, 10k, 47k, 100k resistors
-100k potentiometers
-0.1uF, 1uF, 10uF capacitors
-LEDs
-lots of jumper wires
---------=TIMELINE=---------
00:20 Intro
MATERIALS
1:45 OMSynth mini lab intro
2:15 Electrical components and tools
OSCILLATORS
3:48 oscillators
5:22 BASIC pitch modulation.
SIMPLE SEQUENCER
6:15 Simple sequencer using a clock divider (!!)
11:06 Making our simple sequence more complex with diodes and switches.
13:19 Adding diodes. theory w/ schematic
14:36 Demo
8 STEP SEQUENCER
17:05 Intro
17:46 Theory
22:50 Sequencer demo
24:24 Building
24:45 Basic operation
27:45 Playing with bits !
29:25 Syncing your oscillator to make a harmonic sequencer
30:55 demo
31:35 playing with resistance
32:37 demo
8 STEP VOLTAGE SEQUENCER
33:43 How its done
34:29 Adding diodes to make complex sequences
36:00 Wrapping up
MUSIC DEMO
37:13 Party Jams
37:36 Shout outs
37:59 Sleepy cat
38:03 after party
LINKS:
Schmitt trigger info:
en.wikipedia.org/wiki/Schmitt...
CD40106 hex schmitt trigger data sheet:
www.fairchildsemi.com/datashe...
CD4040 binary counter data sheet:
datasheet.octopart.com/CD4040B...
CD4051 8 channel multiplexer data sheet:
www.fairchildsemi.com/datashe...
Voltage divider theory (good to know!!!):
en.wikipedia.org/wiki/Voltage...
This video was produced during an artists residency at Ljudmila Lab in June 2015 with financial support from the Slovenian Ministry of Culture and the Municipality of Ljubljana's Department for Culture. The residency was part of Changing Weathers project, which is co-funded by the Creative Europe programme of the European Union.
Produced by: Ljudmila, Art and Science Laboratory and Projekt Atol Institute
www.ljudmila.org
www.projekt-atol.si/
www.changingweathers.net/
Can't thank you enough for this series Peter! You display a passion for this kind of tinkering that's hard to find very often anymore in this community. Keep it up!
yes! i love it :)
Dude, you are absolutely amazing. Thank you for this series!
my pleasure :))
So THANKFUL for your series here, Peter. Thank you!
I've been using this chips for years and you just showed me something new! Awesome!
Thanks for these vids it definitely helps with my ongoing project to build my own ideas in my head, listening to the people from BASTL got me started in this direction so I have been reading and watching everything I can find to self educate for this
Made my day! Just got my 4040s in the mail yesterday, waiting on the rest. Thanks Casper!
+James Brickhill Hazzah! such a good chip
+casperelectronics synthesizers where can I get one of these OM synth board, I need to own one?
should be available for purchase in a few weeks
here! noise.kitchen/product-category/bastl/omsynth/
Great video! Looking forward to part 3
AWESOME! These tutorials are fantastic and fun. Thank you so much for putting them out on the line. I'm looking forward to seeing more.
Thanks! Next one coming in a few weeks.
These tutorials are superbly done…………Thank you. I am new to learning about building oscillators, sequencers etc. These are a fantastic starting point. In fact I have just ordered all the required parts this afternoon. So will be experimenting just as soon as they arrive.
These are Seriously Great Videos!
You just made me realize the potential of some of the chips i have sitting there for months. Also i need that Scope! Definitely the next thing on my shopping list.
Fantastic series!! Thanks so much
Wow, this is just great. I was thinking of building a function generator for one of the electronics only you tube channels, like mjlorton or eevblog but I will do it from this demonstration. Very inspirational and inventive. I love the use of the DSO138 and the breadboard work. It is great in getting a feel for the values of capacitors and resistors. The visual presentation using the whiteboard, and the breadboard together is an inspiration idea. Very little repetition here and absolutely no danger warnings! I will look at all this guys you tube posts.
Ive learned so much from these videos.
The pattern at 29:13 is 👌🔥
Fantastic series. Many thanks.
This is so well put together and easy to follow
I love the bit of music at the end!
"Hey, whatcha doin'?"
"Not much, just tuning my avocado."
Instead of using resistors or potentiometers he uses avocados XD
My most favorite video. Man this is amazing what you can do with ic chips and breadboards
Thanks so much....great series, superb tutorial with clarity, even for the clueless like myself....awesome potential.
very cool. drawing on the table works great
Really love this series!!! Don't forget to drink that coffee ;)
Thank you so much for all your work. I love you.
I LOVE THIS! I'm just getting into this and learning a ton! Great job!
woohoo!
I love your videos man. Thank you. That being said I’m so envious of your Ohmsynth, wish they weren’t gone for good 😭
A note to other diy synth newbies like myself: If you’re moved to invest in the materials needed to build these circuits and follow along as well as hopefully furthering your experimenting, know this: these oscillators only sound as good as your amplified audio source. I just found out just how good these circuits can sound through a powered studio monitor with decent bottom end. Life changing. Invest in the best audio setup for this stuff as you can and you will be VERY motivated to make and learn more once you hear how good this handful of parts can sound. Trust me. Peter, you sir are GOLDEN. ❤️
Yes! i collect subwoofers just to abuse with breadboard madness. The difference is epic!
casperelectronics synthesizers Peter, I do have to confess; I just can't seem to get the sequencer working. All else I've done works great. Any chance you might edit this video to build up the sequencer in a similar step-by-step fashion as the previous circuits?
@@Sarahbuildsstepsequencers i cant find your previous post about the broken link but the links are now fixed and you can check out the sequencer drawings. hope that helps
Love your videos ❤️
Great tutorial. Just what i was looking for. Thanks
good video greetings from Mex City
best diy video
Just discover your channel. Direct suscribe! Love it
great!
Like the little scope. CD4060 has a few advantages and can be used mostly like a 4040, cascade if needed. 74HC4060 ( 4040,4020 ) has higher current and plenty of volts for most things. It is 5V logic. CD is higher voltage when required. All seem to cope with a bit of abuse as the Ron of the output devices is mostly self limiting.
Use a dc offset lfo sine wave as the power supply to the 4040 for a VCO controlled sequencer
Thanks for these vids make more I subscribed. You should try making the Tetris theme with just analogue circuits.
ahh these CD 4051 and CD4040 must be what you used in the bitranger !
cool
AMAZING VIDEO! Can you tell us more about that little beauty you kindly call mixer?
Thank you so much
Hey there! Could I get some help? After hours and hours of trying, I couldn't get this to work. I made 1 oscillator, wired it up to clock, got /2 /4 /8, wired that up to A B C, but I guess I couldn't figure out how to wire up pots. I made 2nd oscillator, audio oscillator, on the same 40106, wired right leg of each pot to upper input, and connected every middle leg to one of the inputs on multiplex, took the output of multiplex and connected it to oscillator output. But I get nothing, or some random clicking and noises...I don't know what could it be, I use external PSU to power up everything, and sometimes I even get some strange feedback from the clock outputs on oscillator output even if they are not connected (except power rail). I connected Vss, Vee and INH to ground, which I found in the manual for multiplex. Also, multiplex draws a lot of current I guess, since it got really hot if connected to 12V right away, If i place current limiting resistor, then it gets hot instead. Idk, I might just broke the multiplexer, the clock outputs work fine with 1 oscillator, but as soon as I connect them to A B C i get noise and volume drop...I know that wasn't clear explanation, but I'm quite tired from trying to fix this. If someone has an idea, I would really appreciate it. Thanks!
How do you make an L.E.D. driver? Thanks I saw it on part 3. Thank you.
Woo hoo. I did it! 😂
Hey Peter,
Another question if you don't mind. I am having trouble understanding the schematic with how to hook up the 8 pots. Are all three legs of the pots being used or are only two being used?
Thanks again for the help and the great vids!!
Clint
Heya there, I have a question.
So, simply out of curiousity, what would the benefits/downfalls be of using these IC's as opposed to a 4017 chip, or is it simply personal preference?
Thank you for any help ^_^
do you have a schematic for your amp and mixer on the om synth that you can share?
This is great! Thanks for sharing! I have a question: Can I just use 1 4051 to control both the sound and the led?
its really best not to. in some cases you can get away with it but it can result in compromised functionality of both the light and the sound.
The tutorial links for this video series are now here after Bastl updated their website;
bastl-instruments.com/diy/tutorials
Will there be a third part? this is awesome! Gonna try and make my poor-man's omsynth!!!!
certainly there is
Peter, will the OMSynth make it possible to adapt these basic circuits to 1v/Oct or Hz/V?
When will it be available for purchase? Any tips needed to order a board run using your layout posted on the site? I'd like to connect Novadrones to my other gear
I plan to start selling the OMsynth soon-ish. As far as volts to hertz etc. whatever you can do on a breadboard you can do here. So yes it's possible but you will have to wire it up yourself.
Brutal! is it capable of generating envelopes within each step?
27:00 I think that using sliders instead of turning knobs would be better for an input of the step sequences, because it would work like a piano roll: one could see the pitches as positions of the sliders, similar to notes on a staff.
Yup. I agree
Hi, What kind of potentiometer is that, where can I buy it?
Is there any way that you can use this with midi like you could with some analog synths
Is a patch bay for the 4040 chip over kill? I would like to make the oscillators in a module....the divider in a module....Sammy in a module and the sequncer also the touch pad....if I did that would that be a eurorack? The casper eurorack
Again this video is great! I have made this and tweaked it a bit, but am wondering can this be expanded to a 16 step by running 2 cd4015 in series? I've read the data sheet (and got confused) and looked around the net, but cannot find anything that makes sense to my fairly novice brain... can this be done 'easily'?
It can be done with a 16 channel multiplexer like the cd4067
Cool stuff! How about VCA and envelopes? Glide and legato switches would be cool also.
P.S. Is it easy to build an expo converter for this thing? I'm thinking about a simple synth that will be controllable via a MIDI to CV device.
would it be possible to use the little scope display in a diy synth permanently? I'm looking to make some modular boxes for education and a display continuously showing the waveform would be useful, and so damn cool.
do you have to double the parts to make a set of sequencers?
just wow! thank you for this descriptional videos! it really got me started into creating a first box for my modular journey :) i have a question , how would i add skipping or shortening the length of the sequence? for example make it restart after the fifth...
another question is, what do i need to take into account for the power supply? it seems my arduino board is not giving enough, as the led's are barely visible in my setup.
ello propello hey! For power I would use an external supply, not powering it from the arduino. Somewhere between 5 and 9 volts DC at 50ma or more. As far as sequence length, skipping steps etc, the multiplexer style sequencer is far more flexible than a standard scrolling 8 step sequencer. The step is assigned by sending binary signals to three data input pins. You can choose any step you want this way, skip around the steps, run backwards, etc. this is especially easy if you use the arduino as your data generator
thanks for the feedback. i already attached it to my eurorack powersupply. its now running smoothly and i built a nice breakoutbox. thanks again for sharing your knowledge
Mum : don't play with food
This guy : you will see mum, you will see ..
NICE work!
wht not use 4017 for easier secuencing?
Because using a MUX allows you to jump around your sequence in non linear patterns. I find this much much more interesting than the traditional 8 step sequencer that always sequences the steps in the same order
Hey! Really nice piece of knowledge u shared here. So i've got a question then - how would you make a sequencer step mute function (as in sequence running as it normally would, except muting steps 2 and 5 for example)?
You can connected multiple MUX chips together and have them share address bits. This makes each MUX run through the same steps at the same time. One MUX controls pitch. One controls the lights and one could be passing the final audio signal through 8 steps. Each step can have a switch to determine if the signal will go to the amp or not. This would allow you to mute the signal for each step.
Thanks for the video. At least I can say I went from boob to noob with your tutorials!! ha
Fantastic video and series! I hope the next part is about a drum machine , it would be pretty damn cool!!
Just a question: i didn't get how all this can work if i don't have the black hardware part above the breadboard, and possibly where i could buy it.
Also, what is that item that allow us to see the waves? It's pretty cool to have that thing while playing! You got a subbed ;) keep doing!
The thing with the waves is an oscilloscope. Search "oscilloscope kit" and a bunch that are similar to the one in the vid will come up. There're around 20 bucks but you have to assemble them.
How would you get drum sounds?
So I purchased the Ohmkey, and it looks like it is wired as the resistor for the 4051... but then how is the feedback loop from the 40106 connected...??? And when pots are used, they are left floating on One end??? Amazing work Casper! I still can't figure out many things but nonetheless I keep coming back to this video and each time I learn something new...!
Hi, I would like to know from where can i buy the Omsynth as it looks like its really helpfull for an electronics noob like me. :)
Awesome series! Curious as to what IC and speaker you're using to amplify the OMSynth? Or is that a trade secret? Cheers!
The amplifier chip is the LM386. The speaker is Kingsgate brand, part # KSSG3108
Thanks so much for taking the time to reply! Have a great day
Great, now I want some guacamole in addition to the OMSynth....
Enjoyed both parts of this series, really interesting.
Just one question - I notice you are using CMOS chips but you make no mention of the fact that they are sensitive to static electricity and you don't appear to be taking any precautions. Any particular reason why?
In my years of circuit building I have never once broken a CMOS chip with static discharge.
Has anybody built the 8 step sequencer from the build layout ? I'm wondering where the small red jumpers right in front of the pots on the breadboard go?
Hi!
Great videos! Can the schematics be found somewhere? The link isn't working, i just get a message: Internal Server Error when i click it.
The host is doing "emergency maintenance" on their servers. Will be back up soon.
Ok! thanks for the fast reply!
Thank you for taking the time to clarify these techniques! I'm a big fan of your site and work. I was curious if you could share the identity of the sampling chip? I've been trying to get clean repeating sampling from some toys and stuffed animal innards but it's just not cutting it. Whatever you're using in the afterparty there is exactly what I need! Thank you again, I've been struggling to make the 555 chip solve all my problems, and now it's clear that there are simple alternatives.
The sampler chip is the ISD1820. But don't be fooled! It's not clean! But it does sample and loop. This is the topic of the next video
!! I actually obtained that very same chip a few days ago! I'm having a blast with it, and granted the quality is poor, but the delay time in the looping is decent. I'd like to get rid of that annoying click, but I can live with it. I'm currently experimenting with putting the output through an op amp acting as a comparator to get peak activated triggers from recorded audio for more interesting sequencing rhythms. I'm really looking forward to that video even more so now! Thank you for your reply, and have a good day!
+Raccoon Eating Cacti cool! but yeah.. the click is pretty annoying. i played around with some filter mods to remove it. similar to what were outlining. Some kind of simple level detector that detects and removes the click... but in the end i think i will just live with it.
+casperelectronics synthesizers maybe it would be possible to use the "end of sample" led to trigger a de-amplifying envelope... but i think its perfectly in time/phase with the click... so probably won't work.
I had not even considered that as a possibility! I gave up on getting rid of the click... Most of the applications I've been using the chip for have been either so sped up that it doesn't matter or very harsh and clicky in nature. for seamless textured loops the barbie karaoke delay works much better. Thank you for your replies.
I've heard of Fruit Loops as a DAW, this is maybe healthier. Low fi but high fiber.
imagine living on venus... fl is earth. this takes some good work. I love mine its very intuitive.
Great video, thanks a lot!
Do you plan to make voltage controlled oscillator?
I really like simplicity of NOT gate based oscillator, but resistance control makes sequencers and other stuff more complex.
+oleoleone Its easy to convert the gate based oscillators to be voltage controllable. I just didn't want to add another layer on top of a bunch of (probably already confusing) info in this video. I can post a schematic if you're curious.
+casperelectronics synthesizers
yes, please, post it, or just send it to oleoleone at gmail
please
extremly nice video thanks a lot casper ! i just have one (silly?) question after this, what's the kind of switch you are using at around 22:50 to make a step by step adjustment and then putting the clock back in the circuit ? looks like i've missed something ^^
+loris Habib yeah....thats kind of a special switch. when you press down its momentarily on. SO i press down and it sends a single pulse of current to the clock input of the counter. In the center position it is OFF. When i press up its a latching ON switch which connects a clock to the clock input of the counter.
ok that's what i thought thank you ! do you know where i can find these in europe ?
+loris Habib . I dont know where you can find them anywhere :( I bought them a long time ago and cant find more .
arf ! ok ! i'll try around home in small shops ;)
hey, can you tell please the amount of capacitor in the right top corner of breadboard? thanks!
100uF
Are these OMSynth Mini Lab boards available for purchase yet? I looked on your site but didn't see any way to acquire one.
Thanks! The full kit was sold out by the time I got there, but I was able to buy all the modules individually. Can't wait to get started!
could you please tell me what software you use to draw blue-prints such as sequencer2V2-1.png? Thank you.
alvaro obyrne I use eagle. They have a free educational version. Nice program but will take a bit of time to learn. I took a week to read through the manual and watch UA-cam tutorials and was ready to go.
Like many others said, your series of videos simply kick ass. I don't know if you (or any buddy around here) can tell me: If I use the divider chip as an octave generator, can I still use the original sound, directly from the oscillator, mixed to the octave? Like creating a different timber? Thank you so much for your videos. thanks to them I'm really diving into it. Cheers!
Rodolfo Ribas yes you can still use the original oscillator :) mixing them together is a nice technique for varying timbers as you mentioned
hey! sorry for not responding sooner. YES! you can mix in the original signal no problem.
Can you show the circuit for the 8 LEDs for the CD4051 ? Thanks
you added 2 wire instead of 3 from 4040 to 4051 a and b for pots.. what did you connect thru the 2 wire that gives you sequence?
At what part in the video? Send me the time and i'll check it out
Hey Peter,
I'm happy to say that I ordered an OHM Synth with the sequencer kit. Can't wait for it to come in.
However, in the meantime, I have been trying to get this 8 step sequencer to work with out it with little success. I should say that I am a total newbie when it comes to this. My only experience with electrical is with my job (Mechanic) and my home. I am fairly good with schematics but I do not consider myself a pro.
After many start overs and much trouble shooting, I finally have it sequencing, but I can't get my 8 pots of the sequencer to change pitch. Also, when I jump my number three leg of the second 4051 to the output of my audio oscillator, I lose all sound completely.
I know that I have to be missing something even though I maticulously try to follow the schematic. Hoping maybe you could throw out some suggestions. I have tried to follow the schematic, the colored diagram of the sequencer hooked up to the OHM Synth, and your video. Although, I think I confuse myself trying to combine knowledge from all three at the same time lol. As far as the schematic and the colored diagram of the circuit with the OHM Synth, are they exactly the same circuit? To me, the two seem to have some discreptencies.
Thanks a ton,
Clint
Edit: I got it Working!! I had all 8 pots bussed together, but i didn't have them going to the input of my oscillator. now just need to figure out how to get more range. I'm using 100k pots but very little room to play with pitch.
cjpitrej that's great! Glad to hear it :) 100k should be enough. What kind of range are you getting? And what capacitor are you using on your oscillator?
casperelectronics synthesizers
I have a 1uf capacitor for my audio oscillator and a 10uf for my LFO. For the audio I tried .1uf also. What I mean by range is, I only have approximately 1/8th of rotation on my pots before it cuts off completely between the high and low range. I was able to extend it some by tweaking both the LFO and audio oscillator, but not much.
Also, when I did this, as I would turn the pot, let's say from right to left, I would go from a low pitch to about a mid range pitch, drop back low then back up to a high pitch until it cuts off. What could cause that?
cjpitrej oh. Hmmmm. Unfortunately I don't know. There are lots of possibilities and I would need to know more about what you built. I will say that I've built this circuit hundreds of times and it works. So when you encounter problems like this on testing circuit designs that you know work, it's often best to just tear it down and start over
I love your ohm synth! I tried making my own but have yet to succeed in getting the desired results. Is there anyway you can send me a schematic?
casperelectronics.com/wp-content/uploads/schematic.png
Do you sell the OM synth
is there a circuit diagram available for the sequencer at 26:00 ? I want to build it but am not sure of all of the connections.
schematics and breadboard layouts can be found at the casper link in the description
casperelectronics.com/finished-pieces/omsynth-minilab/omsynth-video-tutorials/video-2-sequencers/
we also have kits for the sequencer projects here noise.kitchen/product-category/bastl/omsynth/
Hi Casper Totally amazing stuff.. hours of fun. With the 8 step voltage sequencer how would you go about changing it to 16? I have found numerous 8/10/4 steps but can't find a 16 step schematic. I was going to use CD4017 but after seeing this i would like to use these 4040/4051 ICs is it possible? Thanks for your Vids and time :)
????????
heyooo. sorry for the slow answer. You can use the CD4067 16 channel multiplexer. You would use it the same way that you use the CD4051 8 channel mux but with one more data bit. So for the CD4051 you connect /2, /4, and /8 from a CD4040 to the address bits of the CD4051. With the CD4067 you would use /2, /4, /8 and /16
the only way is using the CD4067?
Can't I use two 4051?
@@bubagoo
answering my own question! Yes, 2 4051 chips can be used!
@@txchidu Dude your Moon video is amazing! Turn off made for childrens in your vids! Can you upload a vid for your dual 4051 build???
can you use a cd4060 instead of a cd4040?
Would it be possible to make this a 16 or 32 step sequencer? Preferably switchable between 4x8, 2x16 and 1x32.
Yes you can use a CD4067 16 channel multiplexer. BUT the cool trick of this sequencer is that you use different patterns of bits (to the binary address inputs) to determine the sequence. So you have a bank of 8 notes (in this case) but the way you access the notes can make very very long patterns. It's a different way to think about sequencing. Less intuitive than the traditional scrolling sequencer. But much more flexible and, in my opinion, much more playful and musical.
+casperelectronics synthesizers Well, I do like playfulness. Thanks.
So you lose the simplicity of a scrolling sequencer but you gain the ability to transform your sequence by changing the address bits. Which can be done with any square wave
+casperelectronics synthesizers just realised how fantastic that could work with two clock synced sequencers.
+Buster Näslund yup ;) lots of awesome possibilities.
Could I use a Guitar amp to amplify?
Yessir
Hey all. The OMSynth is now for sale with kits for all of the videos! Woohoo! noise.kitchen/143-omsynth
what happened, its out of stock now?
it should be back now...or soon. There may be down time once in a while as we restock parts, but we will keep selling it as long as there is interest.
OMG my super mom is going to buy me one ...I can't believe she told me they were out of stock yess she actually looked ...I think I read they go on back order 3 weeks well thats faster than my turbonegro kutte... please give me instruction so my mom can order one ...please. I wanna party with yoooooou
@@bubagoo Are they still available somewhere?
Were do the drums come from?
Deep in the jungle ....
Schem to build that one that has button to change step etc etc...
How could I mute individual steps?
I'm a bit drunk, is this a goof. Because. Its Awesome. Avocado conductor. Sounds like a band name
How do synth makers take the crap beep noise and turn it into a nice piano-like sound?
Filters :)
0:40 now my ears are dead
Thanks for these videos, keep up the good work. Also, fuck those hackers!
Avocados don't seem particularly great for controlling variable resistance either...
Can you guys help me please?
I'm stuck in the cd 4040 part. I made a functional lfo but when I take the outputs from the cd 4040 the rate still the same. Also when I put the output of a normal oscillator it is supposed to change the pitch using the cd 4040, and that's not working either. I've change the 4040, and no change whatsoever. Help, please.
Is the reset pin connected to ground?
Yeah...
+ciro matheus Costa Where is the signal from the LFO connected? Where is your output signal coming from? Can you upload a photo?
+casperelectronics synthesizers i.imgur.com/5gnLyWJ.jpg
Here's a photo. The lfo output is going into the pin 11.
+casperelectronics synthesizers and btw, thanks for all the attention.
First it was Avocado toast, and now we have Avocado music? What has this world come to?