DIY Oscillator using PIC12F1571

video upload by alloutofsync

"I used this weekend to create a square wave oscillator that operates with the PIC12F1571, which is an extremely affordable CPU available for just $0.71 each.

Since it was my first time using PWM, I spent an entire day generating a square wave at the desired frequency. The required settings and their interconnections were so complex to me, so that I had to carefully investigate each one as I went, which was quite challenging.

The next day, I spent working on ensuring that the output sound smoothly followed the CV input. To convert the CV input into a frequency assuming 1V/Oct, exponential calculations are typically used. However, the PIC12F1571 has limited program memory, so I couldn't use a floating-point math library. I had no choice but to approximate the calculation of powers of two using a Taylor series expansion and rely solely on integer arithmetic. Initially, I approximated up to the second-order term, but the accuracy was insufficient at higher frequencies. Eventually, I extended the approximation to the fourth-order term, which gave excellent results.

While testing with the Pico3 sequencer, I noticed that when the RATE was set to the maximum, the output failed to keep up with the changes. Increasing the PIC's clock frequency from 1MHz to 4MHz resolved the issue, and it followed the changes without any problems.

At this point, about 70% of the program memory has already been used, so I'm not sure how much further I can expand. At the very least, I want to implement duty cycle adjustment. If possible, I’d also like to use an additional PWM channel to detune and combine the signals for richer synthesis."

Homemade Diode Double Balanced Mixer the synth ring modulator's real father, but for RF

video upload by Unrelated Activities

"Homemade Diode Double Balanced Mixer the synth ring modulator's real father, but for RF

Thanks for watching."

Erica Synths & Moritz Klein Introduce EDU DIY LABOR prototyping station

video upload by Moritz Klein

"Disclaimer: I actually created Labor together with my friends at Erica Synths and Dr. Shalom D. Ruben, who's a teaching professor for engineering at the University of Colorado. Either way, it's an awesome entry point for anyone looking to get started in circuit design. (Or a great help if you've already disappeared down the rabbit hole.)"

Chapters
00:00 Feature Overview & Bundle Versions
01:32 Prototyping with Labor
03:23 Expansion Modules & Outro"

"Get started in circuit design with MKI x ES Labor! Developed in collaboration with Dr. Shalom D. Ruben teaching professor for engineering at the University of Colorado Labor is a fully-featured circuit design playground and a powerful electronics learning tool all in one. Created with the aim of serving as a universal learning tool for electronics engineering Labor enables users to delve into various aspects of electronics design from fundamental concepts to advanced techniques. Whether you're a beginner exploring the basics or an experienced engineer honing your skills Labor provides a versatile platform for experimentation and learning. Create your own filters oscillators envelopes sequencers – and whatever else you can come up with. Or use it to learn the basics by following along with our series of educational DIY kits.

Features
a built in dual power supply producing eurorack-compatible voltages, with built-in over current protection for safe experimenting
a modular interfacing section with 16 slots for potentiometers, jacks & switches
a pulse/triangle/sine oscillator (audio & LFO range)
a multi mode envelope generator controlled by a premium push button
a buffered variable control voltage source
an output amplifier with variable gain
a dedicated headphone output and a line-level output for recording, processing and analyzing the signal
an expansion slot for installing specialized prototyping tools
a protective lid to cover a breadboard.
EDU DIY Labor Basic Kit includes:

LABOR
Power Supply Unit
jumper cables
array of interfacing elements like potentiometers, jack sockets, switches
EDU DIY Labor Full Kit includes:

LABOR
Power Supply Unit
jumper cables
array of interfacing elements like potentiometers, jack sockets, switches
commonly used components (resistors, capacitors, chips, transistors) to start building circuits straight away


We – Erica Synths and Moritz Klein – have developed a series of educational DIY kits under the brand name mki x es.EDU with one specific goal in mind: to teach people with little-to-no prior experience how to design analog synthesizer circuits from scratch. What you’ll find in the box is not simply meant to be soldered together and then disappear in your rack. Instead, we want to take you through the circuit design process step by step, explaining every choice we’ve made and how it impacts the finished module.

NB! All kits in these series are simple and come with extensive user manuals which can be downloaded separately, therefore we will not provide customer support in case your DIY build fails to function or similar."

9 BPF VOCODER

video upload by Unrelated Activities

"9 BPF per bank VOCODER

Thanks for watching."

JCS BN-1 "Bakery of Noise" Digital PCM Synthesizer – One of a Kind

Note: Auction links are affiliate links for which the site may be compensated. "JCS BN-1" 4-Bit Linear PCM Synthesizer - Part 1 (Prototype)

video upload by blarrer20

"JCS BN-1" 4-Bit Linear PCM Synthesizer - Part 2 (Finished)

video upload by blarrer20

"This video demonstrates the final version of a 4-bit Linear PCM synthesizer that I have designed and built over about two months. It makes use of mostly Soviet clones of 7400 and 74LS series TTL chips, with no microcontrollers involved. It has a 256 x 4 SRAM chip that allows the user to program whatever waveforms may be desired, with looping capability, and starting at whatever point desired. Most importantly, it is able to be controlled by an external source, for example a keyboard instrument. It also has a frequency doubler circuit. This video is part 2 of 2, showing the finished product.

If you want to skip right to the sounds, go to 27:08"

via this listing

Pics of the inside below.

Details from the listing:

CLICK FOR MORE »

VOCODER, 7 bands, analog (with schematic)

video upload by Unrelated Activities

"VOCODER, 7 bands, analog (with schematic).

Thanks for watching."

VOCODER, seven bands on breadboard #analogsynthesizer #modularsynth #synthesizer #vocoder

video upload by Unrelated Activities

"VOCODER, seven bands on breadboard.

Thanks for watching."

Unrelated Activities is Sbranvlztronics.

Ghost in Translation 16 Inputs 16 Ouputs Teensy Eurorack

video upload by Ghost In Translation

"Using multiplexers for the inputs, the 2 ADCs of Teensy 4.0, shift registers for the outputs, I am able to sample 16 analog inputs at 44.1kHz each, and output 16 sigma-delta digital signals that can be filtered to produce analog signals up to 50Hz.

I am confident I can improve frequency and resolution of the outputs just with software, and will work on that later. For now this is enough for gates, triggers, CVs and LEDs.

This board is my platform for Eurorack modules, Motherboard 2. Everything will be available and documented on GitHub when I finalize a few more things.

Follow my work: https://www.instagram.com/ghostintran...
https://www.patreon.com/ghostintransl...
https://github.com/ghostintranslation
https://ghostintranslation.bandcamp.com"

MIDI out test Great Conjunction prototype into the Prismatic Spray through Hologram Microcom

video upload by Arman Bohn

"It’s been a while. I’m back. Here is yet another in the seemingly endless prototypes of the Great Conjunction. I’m testing the out from the sequencers of the GC, feeding the output of the first sequencer via MIDI into the Prismatic Spray. All of this is getting beautified by the Hologram Microcosm."

Digital Cymbal

video upload by George Benton

"I took an MKS50240 Top Octave Synthesizer IC (TOS) and copying from a Lowrey Organ circuit from the 80's made a Digital Cymbal noise Generator.
Lowrey D350. The MKS50240 is obsolete as far as I know. If anyone can source them put it in the comments. I hope to do a part 2 when finished."

Kind of like the EML Polybox.

Building A Whole Analog Synthesizer voice From Start To Finish On Breadboard

video upload by LOOK MUM NO COMPUTER

"Building DIY ANALOG SYNTHESIZER FROM START TO FINISH
if you'd like to see more videos on this project/livestreams and more
support here :- https://www.patreon.com/lookmumnocomp..."

Note the chapters were not listed at the time of this post. You can skip around using the player controls at the bottom of the video.

Synth Rorschach #84

What is it?

See the video below.

Note the patch points appear to be mini pins in to banana plug type sockets.

P.S. Akai gets a label for this one.

CLICK FOR MORE »

A Synthesizer for $30

I built a Synthesizer for $30 video upload by Marke Eigenbau

"Made with transistors and capacitors."

Don't miss the end for the bits.

A prototype interface using Arduino, breadboard and components for music and sound design.

video upload by Frequency Manipulator

"This is a journey into Prototyping. Documenting the transition from a flakey breadboard to a soldered Arduino Uno Sheild solution. Max and Kyma in the background. I spent far too long in @SymbolicSound 's Kyma doing the sound design. Thanks to @reallyniceaudio for all the advice.

https://fromatod.co.uk/
https://narmerio.com/"

"please clap"

video upload by noystoise

"NT micro prototyping
#synthdiy #breadboard"

Starting a Sidecar MIDI Controller to expand the Ibanez IMG2010 MC1 Guitar to MIDI Converter system

video upload by Unrelated Activities

"The Ibanez IMG2010 electric guitar and MC1 MIDI Converter is an old (1986) but good MIDI guitar system. Apart from translating the audio signal frequency and amplitude from each guitar string to MIDI note number and velocity, it provides MIDI program change messages (via panel buttons and/or a IFC60 footcontroller), Hold pedal, a CTL rotary potentiometer and an Arm on the IMG2010 guitar with assignable MIDI control change messages (cc00 to cc32). When controlling modern MIDI rack synthesizer modules, these control change options are a bit limiting, so I decided to start designing an Arduino 'sidecar' expansion MIDI controller to be used in parallel to the IMG2010 & MC1. It can be fun."

Sbranvlztronics Low Frequency Oscillator Sync Test - Analog LFO with Reset on Breadboard

video upload by Unrelated Activities

"Testing a LFO with a synchronization circuit. The idea is to force the LFO triangle wave output to immediately go to zero volt when receiving a positive gate or trigger at a Sync input. When the gate or trigger at the Sync input returns to zero, the triangle wave output must then always restart with an upward ramp. On this breadboard the reset circuit was implemented with a CMOS analog switch, and the sync control is just a wire to activate it."

Moog ladder VCF with Voltage Controlled Emphasis, on Breadboard

video upload by Unrelated Activities

"Moog transistor ladder VCF (Voltage Controlled Filter) with voltage controlled emphasis, on breadboard."

Sugar Bytes Introduces Nest Modular Style MIDI Sequencer & Plug-In Host / Circuit Bending MIDI Generator

Playlist:
Nest Trailer

Nest Tutorial Part 1

In Part 1 (of 4) we go over the basic principles of Nest, what kind of signals it generates, and how to connect them. We look at how to generate and assign MIDI data to sequence instruments. We also begin our deep dive into the modules.

Start 00:00
The Wire Page (first look) 1:07
The Sound Page (first look) 2:18
The Basics 3:24
Wiring a Voice 5:35
Velocity Input 9:02
Pitch Input 10:08
Patching Session 11:08
Scales 15:12
ALL Scale Mode 17:18
Scale Offset 18:55
Counters 21:17
Counter Demo 22:0
Counter Demo 2 25:12

Nest Tutorial Part 2

In Part 2 (of 4) we continue with our deep dive into the modules, covering many of the classic operators, namely the Multiplexer/Demultiplexer, the Shift Registers and the 7-bit Converters. We look at how they operate, and some strategies for using them musically.

Start 00:00
Multiplexer 00:05
MUX Demos 1:38
MUX as Gate Switch 2:48
MUX B Mode 4:25
Demultiplexer Music 5:44
Demultiplexer 7:26
Demux Patch 1 8:15
Demux Round Robin 9:15
Sample & Hold 11:59
S&H Music 14:44
Analog Shift Register 16:10
Digital Shift Register 19:00
Shift Reg Music 21:27
Shift Register Read-Write 22:02
7-Bit Converters 23:12
DAC Demo 25:14
ADC 26:26
ADC Demo 28:00
Binary Counter + DAC 29:09

Nest Tutorial Part 3

In Part 3 (of 4) the deep dive into the modules continues. Much of this part is dedicated to the MIDI input modules, such as the arpeggiator, and how external MIDI can be incorporated into your patches, or to trigger synced events and logic functions.

Start: 00:00
Delay 0:21
Hold 1:33
Clock Divider 2:24
Envelope 3:23
Inverted Envelope 4:50
MIDI Input 5:46
MIDI Transpose 9:15
Arpeggiator 11:08
Arp Music Demo 14:06
Step Sequencer 17:15
Math Module 20:40
Math: Wrap 22:54
Math: Min/Max 23:25
Math: Percent 24:20
Oscillators 25:41
Oscillator Demo 28:22

Nest Tutorial Part 4

In Part 4 (of 4) we conclude the module section with a look at Logic, Math and Utilities, and some clear musical examples on how to use them. We finish the series with a comprehensive overview of some of Nest’s most important features: Scenes, Plugin Hosting, and mapping Nest’s controls to an external MIDI Controller.

Start: 00:00
Logic: NOT 0:17
Logic Gates 1:24
Logic AND Patch 3:03
Comparators 4:38
Comparator Patching 5:52
If/Else 8:57
If/Else Patching 10:55
Gate to Trigger 13:15
Flip Flop 14:32
Wire Scenes 15:38
Hosting Plugins 22:22
MIDI Learn 25:43
Automation 27:04
MIDI Learn Demo 28:24
Thanks for watching! 29:32

Modular Moog Preset Box - demo of a few functions...

video upload by noddyspuncture

"So, basically having now built and interfaced everything with regards to the Moog Modular preset box - (except the preset cards and also the 901's, I'm still waiting on the FET from the USA for those...) - it occurred to me that I should maybe test out a few of the features. I could do that by replicating what a card would do... basically connecting points to ground and applying some voltages here and there so I picked the lines into the 921B oscillators which control the footages. I also picked one of the lines into the 921A controller for fine tune and then I found the two lines which control the mixer inputs I'm using. I fed a sawtooth from the first 921B osc and a triangle from the second into the mixer, The mixer control here is just on & off... or 'sounding' and 'muted'. The card will allow for in between, so voltage controlled 'mixing' will be possible. I used my little breadboard and pins to change the settings. The functions I'm not changing here are the filter cut-off, the resonance level and also none of the EG parameters. Adding those to this demo would have been too big a job and as I've already had problems with those bundles of wires shorting, it wasn't worth the risk..! And also as those are a massive part of the 'perceived effects' on a patch change this demo is quite a simple and basic one - just to confirm my wiring is 'something like' and also to give you an idea of what this thing will be doing."