Supplies

You'll need a few bits and bobs for this project, here's the comprehensive list.

Tools

• Soldering Iron
• Wire Snips
• 3D Printer
• Pliers
• Allen Keys

Electronics

• ESP32 C3 SuperMini (1x Per Display) - AliExpress
• 5V 28BYJ-48 Stepper Motor (1x Per Character) - AliExpress
• ULN2003 Stepper Motor Driver Board (1x Per Character) - AliExpress
• PCF8575 IO Expander Module (1x Per Character) - AliExpress
• 5V 3A USB Type C Power Adaptor (1x Per Display) - AliExpress
• Circular USB C Panel Mount Power Connector (USB-C with two wires coming out) (1x Per Display) - AliExpress
• A3144 Unipolar Hall Effect Sensor (1x Per Character) - AliExpress

Hardware

• 2.5mm Pitch Prototyping Board - AliExpress
• Some lengths of wire.
• 2.0mm 4 Pin JST Connector Cables (Male and Female), with at least 60mm wire length (1x Pair Per Character) - Amazon
• 3mm Diameter x 1mm Thickness Neodymium Magnet - AliExpress
• M3 X 30mm Countersunk Machine Screws (4x Per Character)
• M3 x 8mm Countersink Machine Screws (4x Per Display)
• M3 Nuts (4x Per Character + 8 for the display)
• M3 x 4mm Depth x 5mm Width Heat In Brass Inserts (4x Per Display)
• M3 Threaded Bar, length depending on number of characters (4x Per Display)
• Black and White PLA Filament

Cost

The total cost per Module is between 4-8£, depending on where you source your components. I used Aliexpress for most items sinde i wasnt in a rush for delivery and the components are generally a lot cheaper.