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The AudioPhool
Registrace 29. 03. 2018
ARM Microcontroller MIDI-to-CV: A Straightforward Guide
Support the channel! :)
www.patreon.com/TheAudioPhool
1-8 layer PCBs only for $2, Get JLCPCB $54 new user coupon : jlcpcb.com/?from=ADP
Arm microcontrollers are used by engineers all over the world to solve just about any problem you could possibly think of. Everything from your phone or laptop down to your dishwasher probably has an Arm core processor in it!
This week we're going to use an Arm microcontroller to do a MIDI to CV conversion unit. This takes incoming MIDI messages from our MIDI controller and converts them into control voltages to feed into our oscillators and other units.
STMCubeIDE: rb.gy/z48z7c
TeraTerm: rb.gy/anl1me
Patreon Microcontroller Series: rb.gy/z48z7c
My Main.c File: rb.gy/nr3kej
00:00 Intro
00:13 MIDI to CV
00:40 MIDI Basics
01:20 MIDI In Circuit
01:50 UART Setup
03:10 Print Out MIDI Message
05:00 Interrupts
06:32 Receiving MIDI!
08:50 System Overview
10:35 DAC, Timer & GPIO Config.
12:10 Note On Message
12:50 Setting the DAC
15:50 Trigger Signal Timer
18:05 Gate Signal Logic
www.patreon.com/TheAudioPhool
1-8 layer PCBs only for $2, Get JLCPCB $54 new user coupon : jlcpcb.com/?from=ADP
Arm microcontrollers are used by engineers all over the world to solve just about any problem you could possibly think of. Everything from your phone or laptop down to your dishwasher probably has an Arm core processor in it!
This week we're going to use an Arm microcontroller to do a MIDI to CV conversion unit. This takes incoming MIDI messages from our MIDI controller and converts them into control voltages to feed into our oscillators and other units.
STMCubeIDE: rb.gy/z48z7c
TeraTerm: rb.gy/anl1me
Patreon Microcontroller Series: rb.gy/z48z7c
My Main.c File: rb.gy/nr3kej
00:00 Intro
00:13 MIDI to CV
00:40 MIDI Basics
01:20 MIDI In Circuit
01:50 UART Setup
03:10 Print Out MIDI Message
05:00 Interrupts
06:32 Receiving MIDI!
08:50 System Overview
10:35 DAC, Timer & GPIO Config.
12:10 Note On Message
12:50 Setting the DAC
15:50 Trigger Signal Timer
18:05 Gate Signal Logic
zhlédnutí: 8 048
Video
Master Op-Amp Imperfections With This DIY Sawtooth Oscillator Design
zhlédnutí 15KPřed rokem
Support the channel! :) www.patreon.com/TheAudioPhool Operational amplifiers (op-amps) have imperfections! Things like input offset voltage, input offset currents, input bias currents etc. We are making a sawtooth core voltage controlled ocillator (VCO) in this video, which requires us to use an op-amp integrator, and deal with all the imperfections that comes with it! We'll use a trusty JFET t...
Design Your DIY Power Supply! (+/- 12/15V)
zhlédnutí 54KPřed 2 lety
Support the channel! :) www.patreon.com/TheAudioPhool Today we're going to have a look at the steps involved in designing a split rail power supply (one containing positive and negative voltages) for your eurorack or similar synthesizer! Including having a look at AC voltage, calculating ripple voltage, picking appropriate capacitor values & more! Patron Only Video: www.patreon.com/posts/new-vi...
Build A Simple Sine Wave Oscillator
zhlédnutí 61KPřed 2 lety
Support the channel! :) www.patreon.com/TheAudioPhool This time we're looking at how to build the venerable Wien Bridge Oscillator circuit. Using some clever feedback with a self-biasing JFET. This circuit Is essentially a very high Q filter, fed back using an op-amp with positive feedback to create an oscillation. Which is then sustained by careful managing of the op-amp closed loop gain. Sche...
DIY Phaser Circuit With Voltage Control
zhlédnutí 18KPřed 2 lety
Support the channel! :) www.patreon.com/TheAudioPhool This week we're going to be expanding on the simple phase inverting circuits we made last time, this time adding a bit of voltage control to make a Phaser! This circuit shifts the phase of a selected range of frequencies, so that when you mix the phase shifted frequencies back in with the oringial, you get a really thick sound. It's a pretty...
DIY Phase Inverter & Attenuverter
zhlédnutí 7KPřed 2 lety
Support the channel! :) www.patreon.com/TheAudioPhool 00:00 Intro 00:26 What is Phase? 02:57 Phase Flipping Circuit 07:53 Phase Flipper Demo 09:01 Attenuverter Circuit 09:53 Attenuverter Demo 12:58 2 Channel Mixer Today we're looking at how to improve the mixer we built last time with our invertin op amp summing mixer circuit. We had an issue where we needed to flip (invert) the phase of one of...
Simple DIY Mixer w/ Op-Amps
zhlédnutí 41KPřed 2 lety
Support the channel! :) www.patreon.com/TheAudioPhool Today we're going to apply what we've learned about op-amps to make a simple summing mixer. This allows us to mix multiple signals to a single output channel, using nothing more than a few op-amps and a handful of resistors! We'll see how we can do this with an inverting or non-inverting configuration and the advantages or disadvantages each...
Making Transistors Easy.. With Op-Amps!
zhlédnutí 15KPřed 2 lety
Support the channel! :) www.patreon.com/TheAudioPhool Today we're looking at how our op-amp golden rules can make those annoying things about transistors disappear completely! No more VBE drop, No more temperature problems! By putting a transistor in the feedback loop of an Op-Amp, the negative feedback will enable us to monitor what the output of the transistor is, and the op-amp will compensa...
How Do Op-Amps Work?
zhlédnutí 11KPřed 2 lety
Support the channel! :) www.patreon.com/TheAudioPhool You may (or may not!) know the 'golden rules' for op-amps. A few simplifying rules that allow us to analyse many op-amp circuits with ease. But do you know WHY those rules work? What is going on inside an op-amp? Lets have a look!
Transistor-Based Voltage Controlled Amplifier (VCA)
zhlédnutí 14KPřed 2 lety
Support the channel! :) www.patreon.com/TheAudioPhool This is a continuation of last time, where we learned how a simple differential amplifier (diff amp) works. We're going to take that design and add a clever thing called a current source in the 'tail' of the circuit, and see how that makes the circuit voltage controllable! This is a more advanced, and much improved VCA compared to my 1 Trans...
Differential Amplifiers Made Easy
zhlédnutí 61KPřed 3 lety
Support the channel! :) www.patreon.com/TheAudioPhool Differential Amplifiers are one of those circuits that can look a bit scary. But we will see today that if you look at it the right way, a diff amp is really no more complicated than the humble common-emitter amplifier! By understanding how a differential amplifier works, we will be ready to really delve deep into operational amplifiers (op-...
High Gain Transistor Circuits
zhlédnutí 11KPřed 3 lety
Support the channel! :) www.patreon.com/TheAudioPhool We're capping off our little series on transistor amplifiers by looking at how we can exctract a little more gain, bypassing the emitter resistor with a capacitor! This builds on the last couple of videos so be sure to check those out of you haven't seen them! Schematic: drive.google.com/file/d/1KFLqLC_FXTV_cBJkSCb7o_sqb5_YXRPL/view?usp=sharing
Simple VCF & Transistor Amp Design!
zhlédnutí 10KPřed 3 lety
Support the channel! :) www.patreon.com/TheAudioPhool This time we're going to do something a little more involved! We're taking an old PAIA discrete VCF design and we're going to try and design an amplifier for it's output. This is a tough one! In this video we have a look at a common-emitter amplifier, as well as some emitter-base bootstrapping to try and improve this circuit! Schematics: dri...
Make Your Own Drum Pad!
zhlédnutí 4,8KPřed 3 lety
Support the channel! :) www.patreon.com/TheAudioPhool A nice easy one this week, we're going to make a drum pad out of some bits and pieces i have kicking around, and we're using an op-amp comparator circuit to turn the drum pad output into a trigger. This can then be used to do whatever you want! We explore a simple envelope generator as a method of controlling a few drum sounds from previous ...
Single Supply Transistor Buffer
zhlédnutí 24KPřed 3 lety
Support the channel! :) www.patreon.com/TheAudioPhool We are going to carry on learning how to make transistor circuits with one of the simpler, (but very useful!) circuits, the Emitter follower :) This behaves very much in the same way as the op-amp buffer that we've used previously, only it runs off a single supply.
Single Transistor Voltage Controlled amplifier! (VCA)
zhlédnutí 32KPřed 3 lety
Single Transistor Voltage Controlled amplifier! (VCA)
Capacitors Explained part 3: Filtering & Phase Shift
zhlédnutí 3,3KPřed 3 lety
Capacitors Explained part 3: Filtering & Phase Shift
Capacitors Explained: Part 2 - Charging With Constant Voltage
zhlédnutí 3KPřed 3 lety
Capacitors Explained: Part 2 - Charging With Constant Voltage
Capacitors Explained: Part 1 - Charging With Constant Current
zhlédnutí 4,7KPřed 3 lety
Capacitors Explained: Part 1 - Charging With Constant Current
Op-Amp Golden Rules & Designing An Active Filter!
zhlédnutí 26KPřed 3 lety
Op-Amp Golden Rules & Designing An Active Filter!
Circuits 102! - Practical Circuit Examples
zhlédnutí 2,8KPřed 3 lety
Circuits 102! - Practical Circuit Examples
Electronics Basics & A Simple Oscillator!
zhlédnutí 13KPřed 4 lety
Electronics Basics & A Simple Oscillator!
Great content, but you speak a bit too fast. Please try to slow down a little, so it's easier to follow.
mains?
finally something helpful for my exam ..thanks a lot
Amazing video, great clarify, leant a lot; thanks a million !. Regards from India.
Its hard to overstate how good your videos are. Good stuff
That is a wonderful single-transistor + 20-transistors in an op-amp IC VCA!
How many transistors would you say are in an op amp?
hmmm could you make this Stereo ( dual mono) by making 2 configs( left and right)- 8 mono for left going to 1 left and then 8 mono right going to 1 right? or is it not that simple lol
how can the current source be changed into a digitally controlled current source to charge that capacitor?
Can you give all in paper note
So… you literally made a “Transistor VCA video” With NO FUCKING TRANSISTORS…. Bro I hate the internet I hate ChatGPT Fucking impossible to ever get clear directions to do anything
Really liked this.
Tyabk you for the amazing explanation. If i understand correctly, then, the reason why we often use a current mirror as a tail current generator, instead of a resistor with fixed potentials, is that the current mirror will *ideally* feature a very high output impedance, thus since this is featured at the denominator of the common mode gain, this means that the common mode gain will be hugely reduced?
I've got two questions. 1. Can I use this differential amplifier in parallel with a load. 2. Do I need to impedance match the differential amplifier to the load impedance
I dont undertand how this will be very stable power supply. Zener drop voltage depends on current and current will not be stable here, because Vin in not constant.
Smart.
I wish you were the teacher in my electronics class lol.
great video!
It's worth noting that it is _disadvantageous_ to use larger filter capacitors than is necessary. This is because the power dissipated in the linear regulators is the product of the average voltage across the regulator and the current drawn. By using capacitors that are only a little larger than the minimum needed (allowing for tolerances, of course), you maximise the ripple voltage, which consequently minimises the average voltage across the regulator and hence minimises the power dissipated in it. It also minimises the inrush current on startup and maximises the conduction angle, so this is a good example of not over-engineering a design.
One of those CZcams gold videos for electronics
The Paia VCF design is very interesting. As to minimize the load of the following simple transistor amplifier, you changed it into a more complex bootstrapping-stage ... but would it not be simpler to add an emitter follower between the filter part and the amplifier part?
Hi - great videos. Could you please share your email? I wanted to discuss a commission with you. Thanks.
Shouldn't the capacitor and the resistor in series to get a decay output? The voltage will be a constant 9V in your diagram I suppose
This is fantastic. Well explained. Thank you
0:29 haha fundamental pun
Brilliant! explanation.. superb!
I always wondered how the comparator inside a 555 worked
Heeeeeyyyyy op amps just clicked
you wanna tell us how you powered the opamp???
@electroboomb
This is your last video, is that permanent?
You deserve millions of subs, for such good beginner videos! :) I am a retired electronics engineer and I always struggled to explain in simple terms to juniors, and you do it GREAT!!!!!!!!!!!!!!!!! :)
i remember i saw some of soundcraft console schematics. and found out interesting summing circuit. so pity i forgot what model it was...
Good video. Here is a Wien oscillator using a light bulb instead of a fet. It's based on an HP signal generator. czcams.com/video/RoAXHHhjECM/video.html I have 2 other examples on my channel.
I wonder how low a frequency this circuit can create. Looking for 7.83 hz. the heartbeat of earth itself.
Thank you!
would it be simple enough to do this with a usb-c connection instead of a wall wart?
1 subscribe, 1 like for your effort sir, thank you for making this amazing content
All that is missing is the follow up video of this project.
Where are you? We miss you? :(
what voltages does a 7915 put out?
Negative 15V DC.
holy shit what an action-packed and well done video. this connected a lot of ancient college memories to what I'm working on now. thanks!
I know this is an older video but i just want to say thank you so much for your in depth explanation and example schematics. This video was the inspiration for my senior design project where me and a partner built a really cool modular synth style guitar pedal with a 3-notch phaser and all of the notches broken out with 3.5mm jacks. We also made a whole stage of digital effects using a Daisy Seed and because of your channel, my partner and I graduated last weekend with BS's in electrical engineering at the university of florida. Much love!!!
Optocouplers with cellotape. You funny
Actually, no electronic device is 100% perfect, it is currently not humanly possible to make electronic components that are 100% perfect, even a simple copper wire isn't 100% perfect.
Actually, no electronic device is 100% perfect, it is currently not humanly possible to make electronic components that are 100% perfect, even a simple copper wire isn't 100% perfect.
very good practical tutorial. thanks
Are you ok? You haven’t made a video in a very long time.
Wow, what a truly educational video. Learnt so much that others just dont teach. Perhaps we should rename you "Carlsberg". If Carlsberg did Electronics videos.......
Hi, thanks for sharing the wonderful knowledge.. At 8:15, you assumed the output to be zero volt. Could you please help me understating this assumption. Could you please share some reference for that. Thanks