The Alpha Geek – Geeking Out

#01 – AcceleroSynth

Project #1 – The AcceleroSynth – Mk3

AcceleroSynth Mk3a

AcceleroSynth Mk3b

AcceleroSynth Mk3c

AcceleroSynth Mk3d

1 X Arduino and Breadboard Holder

1 X Breadboard

1 X Arduino UNO Rev3

1 X Speaker

3 X Jumper Wires Premium 3″ M/M

1 X Cable

AcceleroSynthMk3.1.ino

// ***** Don Luc *****
// Software Version Information
// 3.1 Melody

// Which pin on the Arduino is connected pin 8?
// 8-ohm speaker
#define tonePIN 8
// Pitches
#include "pitches.h"
// Notes in the Melody:
int melody[] = {
  NOTE_C4, NOTE_G3, NOTE_G3, NOTE_A3, NOTE_G3, 0, NOTE_B3, NOTE_C4
};
// Note Durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {
  4, 8, 8, 4, 4, 4, 4, 4
};

int delayVal = 3000; // delay for 2 second

void loop() {

  // Notes of the Melody:
  for (int thisNote = 0; thisNote < 8; thisNote++) {

    // to calculate the note duration, take one second
    // divided by the note type.
    //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
    int noteDuration = 1000 / noteDurations[thisNote];
    tone(tonePIN, melody[thisNote], noteDuration);

    // to distinguish the notes, set a minimum time between them.
    // the note's duration + 30% seems to work well:
    int pauseBetweenNotes = noteDuration * 1.70;
    delay(pauseBetweenNotes);
    // stop the tone playing:
    noTone(tonePIN);
  }  

  delay(delayVal); // Delay for a period of time (in milliseconds).
  
}

pitches.h

{
/*************************************************
 * Public Constants
 *************************************************/

#define NOTE_B0  31
#define NOTE_C1  33
#define NOTE_CS1 35
#define NOTE_D1  37
#define NOTE_DS1 39
#define NOTE_E1  41
#define NOTE_F1  44
#define NOTE_FS1 46
#define NOTE_G1  49
#define NOTE_GS1 52
#define NOTE_A1  55
#define NOTE_AS1 58
#define NOTE_B1  62
#define NOTE_C2  65
#define NOTE_CS2 69
#define NOTE_D2  73
#define NOTE_DS2 78
#define NOTE_E2  82
#define NOTE_F2  87
#define NOTE_FS2 93
#define NOTE_G2  98
#define NOTE_GS2 104
#define NOTE_A2  110
#define NOTE_AS2 117
#define NOTE_B2  123
#define NOTE_C3  131
#define NOTE_CS3 139
#define NOTE_D3  147
#define NOTE_DS3 156
#define NOTE_E3  165
#define NOTE_F3  175
#define NOTE_FS3 185
#define NOTE_G3  196
#define NOTE_GS3 208
#define NOTE_A3  220
#define NOTE_AS3 233
#define NOTE_B3  247
#define NOTE_C4  262
#define NOTE_CS4 277
#define NOTE_D4  294
#define NOTE_DS4 311
#define NOTE_E4  330
#define NOTE_F4  349
#define NOTE_FS4 370
#define NOTE_G4  392
#define NOTE_GS4 415
#define NOTE_A4  440
#define NOTE_AS4 466
#define NOTE_B4  494
#define NOTE_C5  523
#define NOTE_CS5 554
#define NOTE_D5  587
#define NOTE_DS5 622
#define NOTE_E5  659
#define NOTE_F5  698
#define NOTE_FS5 740
#define NOTE_G5  784
#define NOTE_GS5 831
#define NOTE_A5  880
#define NOTE_AS5 932
#define NOTE_B5  988
#define NOTE_C6  1047
#define NOTE_CS6 1109
#define NOTE_D6  1175
#define NOTE_DS6 1245
#define NOTE_E6  1319
#define NOTE_F6  1397
#define NOTE_FS6 1480
#define NOTE_G6  1568
#define NOTE_GS6 1661
#define NOTE_A6  1760
#define NOTE_AS6 1865
#define NOTE_B6  1976
#define NOTE_C7  2093
#define NOTE_CS7 2217
#define NOTE_D7  2349
#define NOTE_DS7 2489
#define NOTE_E7  2637
#define NOTE_F7  2794
#define NOTE_FS7 2960
#define NOTE_G7  3136
#define NOTE_GS7 3322
#define NOTE_A7  3520
#define NOTE_AS7 3729
#define NOTE_B7  3951
#define NOTE_C8  4186
#define NOTE_CS8 4435
#define NOTE_D8  4699
#define NOTE_DS8 4978
  
}
setup.ino
void setup() {
  
}

Don Luc

Project #1 – The AcceleroSynth – Mk2

AcceleroSynth Mk2a

AcceleroSynth Mk2b

AcceleroSynth Mk2c

AcceleroSynth Mk2d

AcceleroSynth Mk2e

We are finally ready for our first electronics project, The AcceleroSynth. It is an microcontroller-based (Arduino) music synth that is controller by a 3 axis analog accelerometer. It will be both a hardware and a software synth. This is the announcement for the project and in the coming days I will post the BOM (Bill of Material), schematics and Arduino code with the first assembly video. The project will first be assembled on a protoboard, then a soldered version will be built either on a perfboard or on an Arduino ProtoShield. If there is enough demand either a PCB or an Arduino Shield will be built for the project and sold here. More on that later.

Don Luc

SparkFun – SPDT Slide Switch

SparkFun COM-09609 Mk01

SparkFun COM-09609 Mk02

SparkFun COM-09609 Mk03

SparkFun: COM-09609

Description: This is a simple SPDT slide switch – great for use as an ON/OFF button, or just as a general control switch. The pins are spaced by 0.1″, however they are incredibly thin making breadboard use not recommended. The switch is rated for 0.3A at 50VDC.

This switch is just a bit smaller than our popular SPDT Mini Power Switch, but uses the same pin spacing. Being smaller takes up less PCB space (good!), but it does make it a bit harder to hit and flip easily.

Don Luc

SparkFun – Dual/Quad Power Amplifier – STA540

SparkFun COM-09557 Mk01

SparkFun COM-09557 Mk02

SparkFun: COM-09557

Description: The STA540 from STMicro is a 4-channel, class AB audio amplifier designed for high quality sound applications. The four independent channels makes this amplifier a great choice for a number of projects, with needs ranging from four speakers stereo (F/R) to two-speaker bridge solutions. The chip accepts a voltage supply ranging from 8 to 22VDC and has very high output power capability.

This chip comes in a staggered-lead Multiwatt-15 package. While our breakout board for the L298N isn’t designed for it specifically, it will breakout out all pins of the STA540 to a more standard single row of 0.1″ pitch headers. Also, keep an eye out for some upcoming amplifier products based on this chip!

It works great with the 6400BG Heatsink!

Features:

  • High output power capability
  • Standby function (CMOS compatible)
  • Minimum external components count:
      no bootstrap capacitors
      no Boucherot cells
      internally fixed gain 20 dB
  • No audible pop during standby operations
  • Diagnostic facilities:
      clip detector
      output to GND short-circuit detector
      output to VS short-circuit detector
      soft short-circuit check at turn-on
      thermal shutdown warning
  • Output AC/DC short circuit protection
  • Soft short-circuit check at turn-on
  • Thermal cutoff/limiter to prevent chip from overheating

Don Luc

SparkFun – Piezo Speaker – PC Mount 12mm 2.048kHz

SparkFun COM-07950 Mk01

SparkFun COM-07950 Mk02

SparkFun COM-07950 Mk03

SparkFun: COM-07950

Description: This is a small 12mm round speaker that operates around the audible 2kHz range. You can use these speakers to create simple music or user interfaces.

Each speaker is PTH solderable and requires an operating voltage of 3.5-5V with a mean current of 35mA max. These speakers also have a typical sound output of 95 dBA and a coil resistance of 42 ±6.3 ohms. Many people call this a buzzer but it is not. The piezo element requires a square wave (common from most microcontrollers) to produce a tone.

Don Luc

Pololu – 2-AAA Battery Holder

Pololu 1141 Mk01

Pololu 1141 Mk02

Pololu: 1141

This battery holder features two 6″, 24-gauge leads that have 5 mm of insulation stripped off of the ends.

Description

This battery holder features two 6″, 24-gauge leads that have 5 mm of insulation stripped off of the ends.

Dimensions

  • Size: 53 × 24 × 13 mm
  • Weight: 0.15 oz

General Specifications

  • Lead length: 6 in
  • Cells: 2
  • Cell type: AAA

Don Luc

Pololu – 2-AAA Battery Holder, Enclosed with Switch

Pololu 1143 Mk01

Pololu 1143 Mk02

Pololu: 1143

Enclosed battery holder for two AAA cells. This holder features a lid that slides over the batteries and snaps into place to fully enclose them. It also features a switch that lets you open and close the electrical connection between the batteries and the holder’s leads.

Description

This battery holder features two 6″, 24-gauge leads that have 5 mm of insulation stripped off of the ends.

Dimensions

  • Size: 63 × 26 × 16 mm
  • Weight: 0.45 oz

General Specifications

  • Lead length: 6 in
  • Cells: 2
  • Cell type: AAA

Notes: Switch adds 2 mm to the height.

Don Luc

Adafruit – Half-Size Breadboard

Adafruit 64 Mk01

Adafruit 64 Mk02

Adafruit: 64

Description

This is a cute half size breadboard, good for small projects. It’s 2.2″ x 3.4″ (5.5 cm x 8.5 cm) with a standard double-strip in the middle and two power rails on both sides. You can pull the power rails off easily to make the breadboard as thin as 1.4″ (3.5cm) and stick it onto an Arduino protoshield. You can also cut these in half with a saw to create 2 tiny breadboards, or “snap” these breadboards together either way to make longer and/or wider breadboards.

Technical Details

Dimensions:

  • 2.2″ x 3.4″ (5.5 cm x 8.5 cm)
  • 9.7mm(0.38in) thick, including sticky foam on the bottom
  • Weight: 38.9g (1.27oz)

Don Luc

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