Simple Parts, Great Results

Hey there! Ready to dive into an exciting project that’s as fun as it is educational? I’m here to guide you through creating a 12×12 pixel display panel that’s so straightforward, even a third grader can tackle it with just a bit of help. Inspired by a STEM project my third grader showcased, this adventure into building and coding isn’t just about making something cool—it’s about sparking a love for STEM. With over 20 years as a software engineer, I’ve simplified everything to make this project doable on a budget. Whether you want to light up your room with a custom nightlight, create digital art, or just learn more about tech, this project is for you. 

You can see the 3rd grade talent show blog post here: https://justreed.com/led-stem/killer-coders-project/

Disclaimer on Soldering

While this project primarily avoids the need for soldering, there’s a small exception if you purchase the ESP8266 microcontroller from certain suppliers. Often these chips come without header pins attached, requiring you to solder at least 3 pins for this project. Don’t worry; it’s a simple process, and there are plenty of tutorials available. Plus, soldering all the header pins opens up possibilities for expanding your project with additional components like buttons in the future.

*** Don’t want to solder & don’t want to mess with a 3-d printer?  No problem!  We have a limited number of kits with the exact parts you need here: https://justreed.com/product/12×12-pixel-panel-kit/ ***

Materials:

• WS2812b LED Strip (5m, 30P/m, 150 Pixels): This flexible LED strip is the canvas for your display, capable of showing a wide spectrum of colors. (White or Black version will work)
• ESP8266 Microcontroller (3 pack): The brain of your display, this microcontroller allows you to program and control the LEDs. Recommend having a spare just in case.
• Light-Diffusing Cloth: Softens and evenly distributes the light from your LEDs.
• 2x – 3-Pin Light Strip Clips (20 pack): Enables a solder-free connection between LED strip segments. You will have 18 left of these. It’s a good idea to have extras in case you have a bad connection. 
• Jumper Wires: These will connect the ESP8266 to the LED strips. We only need 3 for this project. 
• 22awg Colored Flexible Wire: Flexible wire for making connections between the strips and the clips.

Tools & Other Supplies:

• 3D Printer: For creating the custom frame for your LED panel.
  • If you don’t have access to one, consider cutting slotted cardboard as an alternative, though it’s less durable and more time-consuming.
  • Many local libraries and schools offer access to 3D printers.
  • Interestingly, the cost of the 3D printer I used for this project is competitive with many traditional color paper printers, making it a worthwhile investment for enthusiasts and a great time to get into the hobby.
• Black PLA Filament (1kg): Used for 3D printing the frame that holds your LED panel.
• Cardboard Sheet (16×20 inch): Serves as the mounting board for your LED strips. An Amazon box cut-to-size will do.
• USB-A Cable: High speed USB data cable. Note: This must be a data cable and not just a charging cable.
• Low Voltage Wire Snaps: Offers a simple way to connect wires without soldering or electrical.
• Tape, Glue, Stapler: For assembling and securing the components of your display.