Thursday, 19 July 2018
New Sound Waves - Eurorack case build
This will be built only in limited numbers.
tHE final design is still being discussed.
The power supply will be designed my MetroModular of Sydney, Australia.
The case will be offered in stained and unstained versions.
It's possible that one version will have a extra "separator" between the base and lid to allow it to be closed fully patched.
More details coming.....
Mutable Instruments Links
There is no microcontroller in this module so I though its would be a good one to start experimenting on. Before soldering the jacks I pondered which side of the PCB do they go on. ???
A friend assured me this was the correct side, however once the jacks are on, any trouble shooting would be extremely difficult as the components are on the same side.
Anyway, I pressed ahead.
All the SMDs are 0603
There, really is no reason why you can't solder the jacks on the other side....except the panel would be reversed.
+ Mutable instruments - flashing firmware
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For more Euro DIY builds click here:
http://djjondent.blogspot.com.au/2017/12/diy-index.html
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Monday, 9 July 2018
L-1 Compressor
I thought I'd give building this a go. Pretty straight forward.
Check out the official site and build notes here:
http://l-1.su/Microcompressor_stereo.html
tHE kit I purchased came with the SMD components already soldered.
All I needed to do was order the through hole parts from mouser
THAT4301 dynamics processor
Apart from the THAT processor, the parts are cheap and easy to find.
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For more Euro DIY builds click here:
http://djjondent.blogspot.com.au/2017/12/diy-index.html
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Sunday, 8 July 2018
Doepfer 128 - Fixed filter bank modifications
Each band pass filter has its own amplitude control knob.
The unmodified 128 has just one output which is a mix of all the filters, depending on the position of each one's amplitude control knob.
It's a lovely sounding filter even though it has no CV control.
It's worth adding an output for each filter.
To do this you must remove the knobs aND faceplate
Ive made a breakout panel .. 4HP
You can find some mod instructions on Doepfers own site:
http://www.doepfer.de/service/A128_single_outputs.pdf
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For more Euro DIY builds click here:
http://djjondent.blogspot.com.au/2017/12/diy-index.html
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Deluge - Synthstrom Audible
Held in Sydney
I'm very tempted to purchase a Deluge.
Some pics:
Ian also brought along one of the early existing Deluges.
It's interesting to see how it it has developed into the current beast.
The Deluge was developed in New Zealand
It's a drum machine, a synth. It integrates with Midi and voltage controlled synths.
Testing the Deluge with some eurorack gear (Metromodular).
Saturday, 23 June 2018
Radio Music - Chord Organ - SD card
suggestions from James Bernard:
(just copy the 16 lines onto your text file).
1. [0,4,7,12,0] Major
2. [4,7,12,16,-5] Major inv 1
3. [7,12,16,-5,0] Major inv 2
4. [-12,-8,-5,0,4] Major inv 3
5. [-8,-5,0,4,7] Major inv 4
6. [-5,0,4,7,12] Major inv 5
7. [0,4,7,11,0] Major 7th
8. [4,7,11,0,16] Major 7th inv 2
9. [7,11,0,16,19] Major 7th inv 3
10 [-12,-8,-5,-1,0] Major 7th inv 4
11 [-8,-5,-1,0,4] Major 7th inv 5
12 [-8,4,7,11,23] Major 7th no root
13 [0,0,0,0,0] Root
14 [-24,-12,0,12,24] organ
15 [-8,-5,4,7,16] Major no root
16 [-12,0,0,12,24] 2 up 1 down octaves
-------------------
Note:
2. [0,3,7,12,0] Minor
3. [0,4,7,11,0] Major 7th
4. [0,3,7,10,0] Minor 7th
5. [0,4,7,11,14] Major 9th
6. [0,4,7,11,14] Major 9th
7. [0,5,7,12,0] suspended 4th
8. [0,7,12,0,7] Power 5th
9. [0,5,12,0,5] Power 4th
10 [0,4,7,8,0] Major 6th
11 [0,3,7,8,0] Minor 6th
12 [0,4,7,10,2] Dominant 9th
Wednesday, 13 June 2018
Master clock 2 Millis() - OLED display
without using the delay() function. This means that other code can run at the
same time without being interrupted by the LED code.
| Pin | Wiring to Arduino Uno |
| Vin | 5V |
| GND | GND |
| SCL | A5 |
| SDA | A4 |
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
const int ledPin = 8;// the number of the LED pin
#define MIN_BPM 20 /*write here the min BPM that you want */
#define MAX_BPM 300 /* write here the max BPM that you want */
#define POT A0 // the potentiometer connects to analog pin A0
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
// Variables
int bpm;
int ledState = LOW; // ledState used to set the LED
unsigned long previousMillis = 0; // will store last time LED was updated
const long interval = 60000; // interval at which to blink (milliseconds)
void setup() {
// set the digital pin as output:
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin,ledState);// set initial state of pin 8 LED
display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // initialize with the I2C addr 0x3C
display.clearDisplay(); // Clear the buffer.
}
void loop() {
bpm = map(analogRead(POT), 0, 1023, MIN_BPM, MAX_BPM);
display.clearDisplay();
display.setTextSize(3);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.println(bpm);
display.setTextSize(2);
display.setTextColor(WHITE);
display.println(" BPM");
display.display();
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval/bpm) {
// save the last time you blinked the LED
previousMillis = currentMillis;
// if the LED is off turn it on and vice-versa:
if (ledState == LOW) {
ledState = HIGH;
} else {
ledState = LOW;
}
// set the LED with the ledState of the variable:
digitalWrite(ledPin, ledState);
}
}
Sunday, 10 June 2018
Basic Master clock with OLED display using delay function
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define LED 8 // LED pin
#define MIN_BPM 20 /*write here the min BPM that you want */
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
// Variables
int bpm;
void setup() {
pinMode(LED, OUTPUT); // LED pin 8 is the output
display.clearDisplay(); // Clear the buffer.
}
//---------------------------------------------------------------
void loop() {
bpm = map(analogRead(POT), 0, 1023, MIN_BPM, MAX_BPM);
display.clearDisplay();
display.setTextSize(3);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.println(bpm);
display.setTextSize(2);
display.setTextColor(WHITE);
display.println(" BPM");
display.display();
digitalWrite(LED, HIGH); // turn LED on for 2 millisecs
delay(2000/bpm);
digitalWrite(LED, LOW); // turn LED off
delay(58000 / bpm);
}
Thursday, 7 June 2018
OLED display - Part 1 - The display function & basic shapes
display.setTextColor(WHITE)
display.setTextColor(BLACK, WHITE); // 'inverted' text FontColor,BackgroundColor display.setTextSize(n) – set the font size, range from 1 to 8
display.setCursor(x,y) – coordinates to start writing text
display.print(“message”) – print the characters at location x,y
display.println("Hello world!");
display.startscrollright(x, y);
display.stopscroll();
display.startscrollleft(x , y);
display.startscrolldiagright(0x00, 0x07); display.drawRect(X, Y, Width, Height, Colour); Round Rectangle display.drawRoundRect(X, Y, Width, Height,radius of round corner, Colour); Circle display.drawCircle(20, 35, 20, WHITE);// (X, Y, radius, Colour); Filled Circle display.fillCircle(20, 35, 20, WHITE);// (X, Y, radius, Colour); Triangle display.drawTriangle(30, 15, 0, 60, 60, 60, WHITE);// (x0, y0, x1, y1, x2 , y2, colour).// (X0,y0) represents top vertex, // (x1,y1) represents left vertex and (x2,y2) represents right vertex. Filled Triangle display.fillTriangle(30, 15, 0, 60, 60, 60, WHITE); &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
{
// initialize with the I2C addr 0x3C
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
// Clear the buffer.
display.clearDisplay();
void loop() {}
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
void setup()
{
// initialize with the I2C addr 0x3C
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
// Clear the buffer.
display.clearDisplay();
// write your main code & display functions here
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.println("Circle");
display.drawCircle(20, 35, 20, WHITE);
display.display();
delay(2000);
display.clearDisplay();
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.println("Filled Circle");
display.fillCircle(20, 35, 20, WHITE);
display.display();
delay(2000);
display.clearDisplay();
// Scroll part of the screen
display.setCursor(0,0);
display.setTextSize(1);
display.println("Scroll line 1");
display.println("line 2");
display.println("line 3");
display.println("line 4");
display.display();
display.startscrollright(0x00, 0x00);
display.startscrollleft(0x01, 0x00);
display.startscrollleft(0x02, 0x00);
display.startscrollright(0x03, 0x00);
delay(10000);
display.clearDisplay();
// Scroll full screen
display.clearDisplay();
display.setCursor(0,0);
display.setTextSize(1);
display.println("jondent");
display.println("synth");
display.println("blog");
display.display();
display.startscrollright(0x00, 0x07);
delay(2000);
display.stopscroll();
delay(1000);
display.startscrollleft(0x00, 0x07);
delay(2000);
display.stopscroll();
delay(1000);
display.startscrolldiagright(0x00, 0x07);
delay(2000);
display.startscrolldiagleft(0x00, 0x07);
delay(2000);
display.stopscroll();
}
void loop() {}
Tuesday, 5 June 2018
Diodes - Basic Info
The name diode is derived from “di–ode” which means a device that has two electrodes.
Orientation
- Small Signal Diode. ...
- Large Signal Diode. ...
- Zener Diode. ...
- Light Emitting Diode (LED) ...
- Constant Current Diodes. ...
- Schottky Diode. ...
- Shockley Diode. ...
- Step Recovery Diodes. (Snap-off)
- PN Junction Diodes
- Tunnel Diode (Esaki)
- Varactor diode (Varicap)
- Photo diode
- PIN diode
- Lazer diode
- Avalanche Diode
- Vacuum Tube diodes
- Crystal rectifier (crystal diodes)
- Gunn Diodes
- Thermal Diodes
- Stabistors or Forward Reference Diodes
- Gold-doped diodes
- Super barrier diodes
Thursday, 10 May 2018
NLC Resonate - build notes
It's in the Eurorack Format.
The Resonate Module uses the core circuit of the Korg 3100 Resonator, with component choices for the filter sections as per the mods introduced by RJB in his blog back in 2005.
The Korg PS3100 is famous for the sound of its resonator.
The main difference of the NLC version is that it has 4 VC bandpass stages and a feedback control, whereas the original has 3 stages and no feedback. The 4 VC bandpass stages can be controlled by a single CV on input 1 (with an attenuator) or individually with each of the 4 CV inputs.
The CV processing sub-circuits are greatly simplified from the original Korg version, simply using op amps to drive the vactrols.
The 2 inputs are summed together. Out 2 is an inverted version of Out 1.
Demo Video - https://youtu.be/VD0j_Nwsv4w
-------------------------------
sOME NLC words of wisdom
Nouveau shamanic - another Nicolas Cage Reference.
Nouveau Shamanic is the name he's given to his personal acting style.
"thousands of years ago, the tribal shamans were really actors. What they would do is they would act out whatever the issues were with the villagers at that time, they would act it out and try to find the answers or go into a trance or go into another dimension, which is really just the imagination, and try to pull back something that would reflect the concerns of the group."
-------------------------------
Back to the build.
I like to get the ICs on first.
I'm using a new solder:
This is brilliant stuff. It's not cheap, but flows so easily and is only 0.35mm. It's 5 core.
I've up to now been using 0.7mm single core.
tHESE rectifiers are a protection against plugging in the module backwards.
I'm using 1.0 K resistors for the RLs - LED resistors.
I'm using NSL vactrols
The white dot on the vactrol is the cathode.
On the PCB, the cathode is marked "k"
Install the headers which join the two PBCs
Nice.
Links:
NLC Build notes
https://www.nonlinearcircuits.com/modules/p/resonate
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