40106 Hex Oscillator Bank - DIY Modular in a Week 1.1

hello and welcome to day one in modular in a week part one I say that because I quite quickly got a narrative problem with doing what I did in a day in one video I I did one kind of module each day but I did many modules and I think that if I had done one video for each day it would have been really hard to follow and I think that the part video for one video per module will be a much better viewing experience for you I hope so today day 1 we are building videos and this video part 1 we are building a oscillator Bank a with a 4106 chip so let's start by looking at which components we're going to need and then let's look at some schematics I also want to say I got my patch cables I bought 100 for $45 I think if you need patch cables this is a really nice deal it's about half the price I could find anywhere else I'll put a link in the description to that and once we start building our modular I'm going to need these at least we have one module and and I'm already using five so it's good to have patch cables and there are five colors so it's there's some kind of color coding that we can do once we have a more complex setup even though it's not that complicated it is still quite expensive from our point of view 13 almost $14 with my very high count very high prices on components so this should be an absolute maximum this is because two of the most expensive components are jacks switches and potentiometers and this one uses twelve jacks so that is six dollars just in in jacks if each jack cost half a dollar which I've written and also [Music] potentiometers we have six of those so that's another six dollars so we were up in twelve dollars in just pots and jacks and then it's just one and a half dollar in the rest of the components so it's once you get lots of jacks and potentiometers it gets expensive however so these are the values that I've used for resistors and pots and potentiometers and depending on what you choose to use you can use any other values of course but to build exactly mine you need these components this first oscillator I found on a site called hackaday it's a very nice site I if you haven't been there I suggest you go and check it out a guy called Elliott Williams made a series called logic noise and I think was eight episodes or something like that and it was just how to make noise and sound with the CMOS chip logic chips and one of his parts in that series was making the 4106 oscillator I believe it was the first one as well so this is a really simple oscillator so following the schematics and using the pin outs here we can make our first oscillator we begin by connecting plus voltage and ground to the 4106 the input is then on pin 1 so we connect pin 1 to the capacitor and the capacitor to ground we also connect the rightmost pin to pin 1 and then we connect the middle pin to pin 2 which is the output we do this because this way when the potentiometer is mostly to the right then you have the least resistance and the highest tone or array of frequency and when you turn it counterclockwise to the utmost left and then you have high resistance between these two pins and you get a lower frequency and to pin two we also connect our output pin which should also be connected to ground once you've done this it should sound depending on your capacitor and resistor it should sound something like this so one oscillator on its own should sound something like this [Music] a little bit depending on your values [Music] [Applause] when you start to hear only clicks it's a bit low for oscillating mostly oscillator purposes but very good for LFO purposes like this is just clicks and this is a bit bit high ear soaring in the hackaday article he then goes on to do this circuit so adding a diode and a 1k resistor in two of these oscillators and a diode and a 1k resistor in between this is something he calls hard sync so this oscillator is synced to this oscillator which means that this oscillator will only oscillate when this oscillator is in the high so if this one has a very long pulse and this one has a very short pulse this one combined in this circuit will end up looking like this so this waveform is only produced when this one is in the high so that's how this works so let's add this however I don't want to hardwire it I want to have a input jack so I can choose if I want to hard sink or not so we connect this to a 1m 4148 a 1k resistor like so and then we just connected there and ground of course so this way we now had added a input sink Jack to this circuit and that sounds something like this as a believer said in an earlier video I did buy an oscilloscope because I did most of the modules without one but it is really good to have one too when looking at when doing these things just to see what the waveforms look like so let's look at this waveform now this is a nice square wave and when we go down it goes wider and go up it gets closer together [Music] okay so we have one here now let's take one of the lower ones let's take this one and let's hard sink this to this one now you see that there's a gap here and if we move out a bit it now looks like this so it this oscillator only sounds when this oscillator is high so if we speed this up these segments move closer and then sometimes it is possible to cascade them one more so if we take a higher pitch one so right really high pitch one and we take this one [Laughter] [Music] so now we have a few of the short ones really narrow ones and some of the wider ones going on the most wide one so [Music] so it's possible to do some quite rhythmic stuff with this even though not very mellow melodic [Music] so now you've done this once now you just do it five more times and if you want you can change the capacitor and resistor to other values to get different ranges of the oscillators and the values I've used are these and also before you continue you need to add one capacitor from the from the ground pin up to the plus pin of 0.1 micro farad and this is to remove some of the of the spikes over the power rail in this circuit when the and the oscillators go up and down which on the hackaday page you can also see in the schematics here from ground to VCC zero point 1 micro farad you can also if you want to lower the volume out from the chip you can do a so the output from this chip is around 5 volts and you can with this circuit lower to around 1 volt which is more in the audio range of things but working with in a modular I prefer at least in this module to have it at 5 volts because that way you can we can use this for as a gate and trigger and control voltage there's nothing stopping you from making this circuit also and you can have one jacked here and you can have one Jack here that would also work then you get both 5 volts and 1 and when you are done with all six of these then you will have a viral board that is a mess and probably looks something like this depending on how much space you gave each components I have a tendency to put everything very tightly together to conserve space on the Barrow board I guess I don't know I you will see that all my marrow boards are very compressed like this and that is it for the 4106 oscillator bank that we are doing you can if you search online you can find lots of other things you can do with the 4106 I even think that you can add its CV control one really simple way I read about adding CV control is to to starve it so where you can hear the phenomenon when you pull the power plug to the to the circuit you are heard the pitch going up so by by having this control voltage as the power source for this one you could by erasing and lowering the voltage that drives the circuit you can change the pitch just a suggestion I haven't done that and I'm going to use it quite a bit as a clock source I think this was not this is just to get you started to start soldiering and and get acquainted with with doing things on a barrow board if you aren't already acquainted with this let's also talk quickly about the front panel as I said in the part 0 I make the panels and Inkscape which I then sent to a friend who has a laser cutter I will you can have access to the SVG files if you want to do anything with them yourself this zigzag kind of design was so here you can see the outlines in green and that was so I could compress the the design at the end the vertical space because all these on top of each other it would have taken up too much space so by doing this exact the potentiometer didn't take as much space then I compressed it as much as I thought I could without them really touching each other so here the outlines are gone but they are just touching each other so this is 14 HP and then I actually managed to make it one HP even less by thinking that they can be slanted a bit so in about 45 or 30 degrees angle like that facing each other all the way down and that actually works and that looks like this on the backside and it did conserve a lot of space from the original design which was taking up a lot more space so with this design as I might not use this that much I don't want this to take up too much space so this was a good compromise and you never look at the backside anyway so and with this module we start our progress of filling our modular rack we have still three more modules we are going to do today the next module in part two will be voltage controllable which this one isn't one is still usable in many ways but you can't control it with CB which you can't with the next one so if you like this press the like buttom the subscribe button the bell button any other button you might find there and until the next video bye

Channel: Kristian Blåsol

Views: 42,152

Rating: 4.9796953 out of 5

Keywords: MIAW, DIY Modular, Modular in a week, modular, modular oscillator, oscillator bank, make a modular, create a modular, modular synthesizer, diy modular synthesizer, diy oscillator bank, diy oscillator, 40106 oscillator, inverter oscillator, 40106 hex schmitt inverter, 40106 vco

Id: DtUCzzjHhgM

Length: 19min 27sec (1167 seconds)

Published: Fri Oct 19 2018