Quantity   Component name
1 × ATMega 328P microcontroller chip Using this as the brains of the computer.
1 × CardKB QWERTY keyboard Interfaces with the Arduino via I2C
1 × 0.96 inch OLED SPI display (SSD1306 compatible) Can use different sizes
1 × 9V PP3 battery Great battery life
1 × 24LC256 EEPROM For storing BASIC programs - 32KB of storage in fact
1 × Empty Altoids tin
1 × Small Piezo buzzer For authentic beeper-style sound
1 × 5V voltage regulator