![Arduino workshop 2018
Arduino: button
[add this to setup]
pinMode(2, INPUT_PULLUP);
[replace loop with]
if (digitalRead(2) == LOW) {
digitalWrite(13, LOW);
}
else {
digitalWrite(13, HIGH);
}
which is same as:
digitalWrite(13, digitalRead(2));
INPUT_PULLUP:
● avoid ‘floating’ input status
● inverted logic: push = LOW](https://image.slidesharecdn.com/sonarhk2018-arduino-slides-180321021511/85/Arduino-8-step-drum-sequencer-3-channels-26-320.jpg)
![Arduino workshop 2018
Arduino: potentiometer
[replace loop with]
void loop() {
digitalWrite(13, HIGH);
delay(10);
digitalWrite(13, LOW);
delay(analogRead(A0));
}
[analogRead returns 0->1023]put the pot legs in
columns 8,10,12](https://image.slidesharecdn.com/sonarhk2018-arduino-slides-180321021511/85/Arduino-8-step-drum-sequencer-3-channels-28-320.jpg)
![Arduino workshop 2018
Serial Monitor and Plotter
[add this line to setup]
Serial.begin(9600);
[modify loop to]
digitalWrite(13, HIGH);
delay(100);
digitalWrite(13, LOW);
Serial.println(analogRead(A0));](https://image.slidesharecdn.com/sonarhk2018-arduino-slides-180321021511/85/Arduino-8-step-drum-sequencer-3-channels-29-320.jpg)
![Arduino workshop 2018
Arduino: sound
[modify loop to]
digitalWrite(13, HIGH);
tone(3, 1000);
delay(100);
digitalWrite(13, LOW);
noTone(3);
delay(analogRead(A0));](https://image.slidesharecdn.com/sonarhk2018-arduino-slides-180321021511/85/Arduino-8-step-drum-sequencer-3-channels-30-320.jpg)
Arduino 8-step drum sequencer 3 channels
- 1. Arduino workshop 2018Arduino workshop 2018 Hands-on Arduino: 8-step drum sequencer Tom Tobback www.cassiopeia.hk 2018
- 2. Arduino workshop 2018 some of Tom’s projects cassiopeia.hk/category/projects/
- 3. Arduino workshop 2018 Before we start… check the connection between your Arduino board and your laptop: ● plugin your Arduino board USB cable into your laptop ● open Arduino IDE software (www.arduino.cc) ● open the Blink sketch from File>Examples>Basic ● pick the correct port from Tools>Serial Port ● pick the correct board type from Tools>Board “Uno” ● hit ‘upload’ to test the connection ● look for ‘Done uploading’ and check if the onboard LED is blinking
- 4. Arduino workshop 2018 Arduino: what is it? Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software It is intended for artists, designers, hobbyists and anyone interested in creating interactive objects or environments • sensors • sound • light • wifi • ...
- 5. Arduino workshop 2018 Our program for today terminology 4 software 2 basic electronics 4 projects 20+ blink sequencer Slides PDF: Desktop/workshop/SonarHK2018-arduino-slides.pdf
- 6. Arduino workshop 2018 Arduino terminology software: • IDE • web editor • sketch • uploading • syntax hardware: • board • microcontroller (mcu) • pin headers • input • output • digital/analog • breadboard • jumper wires • components
- 7. Arduino workshop 2018 Arduino vs Raspberry Pi ➔ looks similar ➔ similar price ➔ micro-controller vs mini-computer ➔ Arduino: IO ➔ Pi: OS Other popular platforms: ESP8266, Particle Photon, micro:bit
- 8. Arduino workshop 2018 Arduino boards ➔ many official boards ➔ different sizes ➔ different connections ➔ use same code ➔ mostly compatible ➔ extra functions via shields
- 10. Arduino workshop 2018 Arduino-style boards ➔ many copies ➔ many improvements ➔ extra functions included (Wifi, GPS, motor, Ethernet,...) ➔ use same code ➔ mostly compatible ➔ cheaper!
- 11. Arduino workshop 2018 Arduino software: IDE ➔ Integrated Development Environment ➔ Write sketch -> upload to board ➔ Useful examples ➔ ‘Libraries’ to make our life easier Always make sure to pick the correct BOARD ➔ Connect using USB cable, pick correct PORT ➔ Upload sketch ➔ Check output of Serial Monitor ➔ Save your sketches..
- 12. Arduino workshop 2018 Arduino software: Web Editor Same functionality with: ➔ Browser based editor (needs login) ➔ Accessible from any computer ➔ Storage in the cloud ➔ Need to sign up for username ➔ Need to install the Arduino Create plugin for upload
- 13. Arduino workshop 2018 Basic electronics ➔ DC direct current vs alternating current AC ➔ voltage: volts 5V (usb), 3V3, 9V ➔ current: milli ampere 40 mA = 0.04 A ➔ power: watts 1-2 W (USB limit) ➔ resistors: reduce voltage ➔ diodes: one-way + light ➔ capacitors: small battery ➔ schematics
- 14. Arduino workshop 2018 Basic electronics DIGITAL: on/off 1/0 true/false high/low 0V/5V ANALOG: variable 0->5V Ohm’s law: U = I * R Kirchoff’s laws:
- 15. Arduino workshop 2018 From prototype to product
- 16. Arduino workshop 2018 Breadboard = connections
- 17. Arduino workshop 2018 Breadboard power rails 5V to red line GND to blue line Optional: connect to other side
- 18. Arduino workshop 2018 Our project
- 19. Arduino workshop 2018 Arduino projects for today ➔ Blink: the ‘hello world’ of Arduino pinMode digitalWrite delay ➔ Read push button digitalRead ➔ Read potentiometer analogRead Build the step sequencer Connect to drum PCB
- 20. Arduino workshop 2018 Arduino: ‘blink’ sketch /* Blink Turns on an LED on for one second, then off for one second, repeatedly. */ // the setup function runs once when you press reset or power the board void setup() { // initialize digital pin 13 as an output. pinMode(13, OUTPUT); } // the loop function runs over and over again forever void loop() { digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wait for a second digitalWrite(13, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second } initialisation setup { } loop { } change these numbers and see what happens ‘upload’ after each change! File>Open> “Desktop/workshop/blink1/blink1.ino”
- 21. Arduino workshop 2018 Arduino: blink Blink: the ‘hello world’ of Arduino 220 ohm LEDs short straight leg goes into the blue line (GND)
- 22. Arduino workshop 2018 resistor colour code 220 ohm = 220 Ω red red black black (brown) 10k ohm = 10,000 Ω brown black black red (brown)
- 23. Arduino workshop 2018 connect the drum PCB 8 inputs - power - speaker power: PWR+ goes to 5V (red line on breadboard) PWR- goes to GND (blue line on breadboard) speaker: connect SPK+ and SPK- BD = bass drum SD = snare drum CH = closed hi-hat OH = open hi-hat RS = rim shot CL = clap RD = ride CR = crash
- 24. Arduino workshop 2018 connect the drum PCB can also connect to amplifier or earphones with 3.5mm mini jack
- 25. Arduino workshop 2018 connect the drum PCB drum triggered on the falling edge HIGH LOW drum sound starts
- 26. Arduino workshop 2018 Arduino: button [add this to setup] pinMode(2, INPUT_PULLUP); [replace loop with] if (digitalRead(2) == LOW) { digitalWrite(13, LOW); } else { digitalWrite(13, HIGH); } which is same as: digitalWrite(13, digitalRead(2)); INPUT_PULLUP: ● avoid ‘floating’ input status ● inverted logic: push = LOW
- 27. Arduino workshop 2018 Arduino: potentiometer put the pot legs in columns 8,10,12
- 28. Arduino workshop 2018 Arduino: potentiometer [replace loop with] void loop() { digitalWrite(13, HIGH); delay(10); digitalWrite(13, LOW); delay(analogRead(A0)); } [analogRead returns 0->1023]put the pot legs in columns 8,10,12
- 29. Arduino workshop 2018 Serial Monitor and Plotter [add this line to setup] Serial.begin(9600); [modify loop to] digitalWrite(13, HIGH); delay(100); digitalWrite(13, LOW); Serial.println(analogRead(A0));
- 30. Arduino workshop 2018 Arduino: sound [modify loop to] digitalWrite(13, HIGH); tone(3, 1000); delay(100); digitalWrite(13, LOW); noTone(3); delay(analogRead(A0));
- 31. Arduino workshop 2018 7 segment display use 8 short wires D13 to D6 (8 pins) resistor from blue line to column 3 10,11,x,12,13 9,8,x,7,6
- 32. Arduino workshop 2018 7 segment display File>Open> “Desktop/workshop/seq8-template1/seq8-template1.ino” this sketch has helper functions in tab “sonar.h” add in loop: showStep(); delay(analogRead(A0)); increaseStep();
- 33. Arduino workshop 2018 7 segment display + pulse modify loop: showStep(); digitalWrite(13, HIGH); delay(10); digitalWrite(13, LOW); delay(analogRead(A0)); increaseStep(); pulse delay showStep increaseStep
- 34. Arduino workshop 2018 connect clock to drum PCB add a long wire from the breadboard (dot of segment display, column 5) to the drum PCB, any input e.g. CH CH
- 35. Arduino workshop 2018 Add 4 control buttons use the 4-pin ribbon cable A1 to A4 X
- 36. Arduino workshop 2018 Add 3 drum LEDs use the short 3-pin ribbon cable D5 to D3 LED’s short straight leg goes into the blue line (GND) X
- 37. Arduino workshop 2018 LED pulses modify loop: showStep(); sendPulses(); delay(analogRead(A0)); increaseStep(); pulse delay showStep increaseStep X
- 38. Arduino workshop 2018 Add 3 outputs to drum PCB use the long 3-pin ribbon cable to BD SD OH X
- 39. Arduino workshop 2018 play/step mode modify loop: showStep(); if (playMode()) { sendPulses(); delay(analogRead(A0)); } else { editStep(); } increaseStep(); add a wire from D2 to GND (blue line)
- 40. Arduino workshop 2018 edit step mode with the D2 wire connected, move to next step with button 4 the LEDs show which drum is active for that step use the 3 buttons to toggle on/off
- 41. Arduino workshop 2018 hack it :-) ● change the 3+1 output wires to different drum sounds ● use a wire connected to GND to trigger other drum sounds while the sequence is playing ● change the code to 6 steps ● replace the drum samples in the drum chip with your own samples ● build a box for this sequencer ● ...
- 42. Arduino workshop 2018 drum chip Arduino chip (Atmega328p) Open Source code “dsp-D8” from https://janostman.wordpress.com/2016/01/03/the-dsp-d8-drumchip-source-code/ (minor modifications)
- 43. Arduino workshop 2018 Arduino: suppliers ONLINE ➔ Official Arduino shop: http://arduino.cc/ great documentation, projects, forum ➔ Seeedstudio: http://www.seeedstudio.com/depot/ ➔ Telesky: https://telesky.world.tmall.com/ ➔ Adafruit: http://www.adafruit.com/ great documentation IN HONG KONG - Apliu St ➔ WECL http://www.weclonline.com/wecl_eng/index.html
- 44. Arduino workshop 2018 Arduino: kits ➔ Seeedstudio Sidekick Arduino kit ➔ Arduino Starter Kit
- 45. Arduino workshop 2018 Dimsum Labs the hackerspace of HK www.dimsumlabs.com/ community of technology enthusiasts space for creativity in Sheung Wan Tuesday evening HackJam www.facebook.com/groups/hackjamhk/
- 46. Arduino workshop 2018Arduino workshop 2018 Thank you www.cassiopeia.hk Happy tinkering!