Projects Index

Pico True or False Quiz Game with LCD display

Put your knowledge to the test with this interactive "True or False" quiz game, powered by the versatile Raspberry Pi Pico! This project transforms a standard LCD display into a sleek, handheld trivia machine that challenges you with a series of quick-fire questions. Beyond the fun of gameplay, it serves as an excellent deep dive into I2C communication; you will learn how to interface the Pico with an LCD display using a PCF8574T I2C backpack and an Adafruit bidirectional level shifter to ensure reliable data transfer. Whether you stick with the pre-loaded questions or customize your own, this project is rounded out with a custom, 3D-printed enclosure designed in FreeCAD, proving that you can pack complex electronics into a compact, professional-looking package without needing complex print supports.

Physical game using a Raspberry Pi Pico and custom case

This project is a true or false quiz game based around a Raspberry Pi Pico with an LCD display.

The game includes a simple 5 question example but allows you to add your own files for a different quiz.

Pico quiz game circuit

The breadboard diagram is shown below. This includes an Adafruit I2C safe bidirectional level shifter, connecting to an LCD display with a PCF8574T I2C backpack.

Breadboard design Raspberry Pi Pico true and false quiz game with I2C level-shifter and LCD display with PCF8574T

The diagram below shows the actual circuit wired up. You can see the PCF8574T backpack mounted on the rear of the LCD display.

Internal wiring for Raspberry Pi Pico true and false quiz game with I2C level-shifter and LCD display with PCF8574T

3D printable case

For this I also created a 3D printed enclosure (case). In this case it was designed in FreeCAD. The enclosure is designed to be quite small, so the screw posts have been "cut-out" towards the bottom to provide space for the breadboard. Despite large overhangs this was printed without any supports, although you may need to scaffold for some 3D printers.

Raspberry Pi Pico true or false quiz game with LCD display and 3D printed enclosure

The design and STL files are provided below. You may need to increase the width of the walls compared to your normal settings which will allow for a M4 screw tap allowing you to screw the lid into the base.

An alternative option is to use a generic case and cut appropriate holes for the display, buttons and USB port.