README.md

ATtiny Prototype Board v2

Simplifies circuit prototypying with the ATtiny xx14.

Features:

• Beadboard (400 pins)
• I/O
  • 4x LED
  • 3x Potentiometer
  • 2x momentary push button
  • 4x Switch
  • 2x 3.5 mm TRS socket
  • 4x banana socket
  • 2/3x I2C
  • 2x Serial
• ATtiny XX14
• FTDI adapter (CH340E Micro USB Serial adapter)
  • UPDI programming
  • USB power
  • Serial debugging

Videos:

• Build: https://youtu.be/CmCrIgkOkTU (no talking)
• Description https://youtu.be/84AR5vEIgwg (German)

Links

• megaTinyCore Core: https://github.com/SpenceKonde/megaTinyCore
• ATtiny xx14 Pinout https://github.com/SpenceKonde/megaTinyCore/blob/master/megaavr/extras/ATtiny_x14.md
• Installation in Arduino IDE: https://github.com/SpenceKonde/megaTinyCore/blob/master/Installation.md

Release Notes

v2.1 changes

Improvements:

• Switch (optional) for I2C
• I2C labels and lines
• Push buttons with opener and closer funtionality
• Moved USART

Fixes:

• banana sockets were too close to border
• more space between switches and TRS

v2.0 changes

• use THT LEDs, resistors, diode
• use slide switch: more reliable and visible
• use only socket header

Blink All

Use this "blink" code to check proper soldering for all ATtiny pins:

// BLINK ALL ATtiny xx14

void setup() {
  pinMode( PIN_PA4, OUTPUT );
  pinMode( PIN_PA5, OUTPUT );
  pinMode( PIN_PA6, OUTPUT );
  pinMode( PIN_PA7, OUTPUT );
  pinMode( PIN_PB3, OUTPUT );
  pinMode( PIN_PB2, OUTPUT );
  
  pinMode( PIN_PB1, OUTPUT );
  pinMode( PIN_PB0, OUTPUT );
  pinMode( PIN_PA0, OUTPUT );
  pinMode( PIN_PA1, OUTPUT );
  pinMode( PIN_PA2, OUTPUT );
  pinMode( PIN_PA3, OUTPUT );
  Serial.begin( 9600 );
}

void loop() {
  digitalWrite( PIN_PA4, HIGH );   
  digitalWrite( PIN_PA5, HIGH );   
  digitalWrite( PIN_PA6, HIGH );   
  digitalWrite( PIN_PA7, HIGH );   
  digitalWrite( PIN_PB3, HIGH );   
  digitalWrite( PIN_PB2, HIGH );
    
  digitalWrite( PIN_PB1, HIGH );   
  digitalWrite( PIN_PB0, HIGH );   
  digitalWrite( PIN_PA0, HIGH );   
  digitalWrite( PIN_PA1, HIGH );   
  digitalWrite( PIN_PA2, HIGH );   
  digitalWrite( PIN_PA3, HIGH );   
  Serial.println( "on" );
  delay( 500 );                       
  
  digitalWrite( PIN_PA4, LOW );   
  digitalWrite( PIN_PA5, LOW );   
  digitalWrite( PIN_PA6, LOW );   
  digitalWrite( PIN_PA7, LOW );   
  digitalWrite( PIN_PB3, LOW );   
  digitalWrite( PIN_PB2, LOW );
    
  digitalWrite( PIN_PB1, LOW );   
  digitalWrite( PIN_PB0, LOW );   
  digitalWrite( PIN_PA0, LOW );   
  digitalWrite( PIN_PA1, LOW );   
  digitalWrite( PIN_PA2, LOW );   
  digitalWrite( PIN_PA3, LOW );   
  Serial.println( "off" );
  delay( 500 );                     
}