Pinout

Feature GPIO (General-Purpose I/O) PWM (Pulse Width Modulation) ADC (Analog-to-Digital Converter)
Input/Output Both Input and Output. Output only. Input only.
Arduino Function pinMode(), digitalWrite(), digitalRead() analogWrite() analogRead()
Mark D_ ~D_ A_

AREF: http://tronixstuff.com/2013/12/12/arduino-tutorials-chapter-22-aref-pin/

Uno

https://www.arduino.cc/en/hardware/#uno-family

Q

  • Debian-capable
  • Qualcomm QRB2210 microprocessor (MPU), quad-core 2.0 GHz CPU
  • real-time STM32U585 microcontroller (MCU)
  • RAM: 2GB LPDDR4
  • Storage: 16 GB eMMC built-in (no SD card required)

R3

Atmel AVR ATmega328P | 8-bit RISC | 16MIPS throughput at 16MHz - https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf

https://store-usa.arduino.cc/products/arduino-uno-rev3
- INPUT VOLTAGE (LIMIT) 6-20V limit / 7-12V recommended - DC CURRENT PER I/O PIN 20 mA

https://content.arduino.cc/assets/A000066-pinout.png - 14 digital input/output pins (of which 6 can be used as PWM outputs) - 6 analog inputs

OLED

  • I2C: 100Khz - 3.4Mhz, many devices on the same bus
  • SPI: 4Mhz and up to 100Mhz

IDE

  • Sketch Menu -> Include Library -> Manage Libraries
  • Search: BusIO + adafruit ssd1306
  • File -> Examples

SSD1306 Oled display: https://create.arduino.cc/projecthub/Arnov_Sharma_makes/0-96-inch-oled-getting-started-guide-78163a

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
// The pins for I2C are defined by the Wire-library. 
// On an arduino UNO:       A4(SDA), A5(SCL)
// On an arduino MEGA 2560: 20(SDA), 21(SCL)
// On an arduino LEONARDO:   2(SDA),  3(SCL), ...
  • File -> Examples —> ssd1306_128x32_spi
    // Declaration for SSD1306 display connected using software SPI (default case)
    #define OLED_MOSI   9
    #define OLED_CLK   10
    #define OLED_DC    11
    #define OLED_CS    12
    #define OLED_RESET 13

3D Case

Pro Mini | Wall | https://www.thingiverse.com/thing:2457807