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Transform the LEGO Game Boy kit into a fully functional emulation-based gaming device!
Gaming
Accessories
Technology

Pre-order: LEGO Game Boy Functional Upgrade

Made by Electronics by Theremin Hero

$100.67

No tax for United States [change]

This is a threshold pre-order. Learn more.

190% of goal
28 days left

Goal: 10 units

Commited: 19 units

Duration: 28 days

Lead time: 70 days

The full writeup on this project is available at https://hackaday.io/project/204088-lego-game-boy-functional-upgrade

No soldering required!

Features:

  • Fully working buttons
  • Game Boy DMG Emulator
  • Game Boy Color Emulator
  • MicroSD card slot for ROMs
  • Custom side-mounted button for in-game emulator menu
  • Save states
  • Custom colour palettes
  • Speaker
  • Battery with USB-C port for charging / reflashing
  • Plays DOOM (just add your own WAD file)

The upgrade kit contains:

  • Fully populated Main PCB, flashed with latest firmware & emulators, tested
  • Buttonboard PCBs with connection wires pre-soldered, tested
  • 300mAh Battery
  • 2.4" Screen
  • Speaker
  • All required additional LEGO parts to make space for the buttonboards and screen
  • Build instructions (no soldering required)
  • Custom 3D printed parts for holding main PCB and buttonboards in place
  • Silicon conductive pad
  • Custom 3D printed part for adding additional menu button on the side
  • SIM card tool - needed for one specific installation step
  • The kit does NOT include a microSD card (FAT32 formatted)

It has all the functionality you'd expect from a basic emulator console, with the LEGO buttons also working. Everything fits neatly inside the LEGO shell.

Initial Demo (Oct 2025)

The Entire Design Journey (OpenBrickGB) (Feb 2026)

Kit Availability Update (OpenBrickGB) (July 2026)

Links to code and documentation

Documentation (hackaday.io)

Code (github.com)

Design Files (github.com)

Schematics (github.com)

Product HS Code: 8543709960

Shipping policy

The kits will start shipping after the end of the preorder window. I will start shipping them in the order that the preorders were made. There is a maximum of 10 weeks after the preorder window for all kits to be sent out. Tracking codes will be provided where possible.

Why run a threshold pre-order campaign?

I started selling these in batches of 10 with a waitlist (originally on tindie) but was overwhelmed with the response. I have also been contacted many times about a preorder system, and this matches my requirements. My manufacturing pipeline is now much more efficient, so I can start committing to making larger numbers of kits. It is far more efficient if I know how many I can sell in advance, and there is benefit in the economies of scale as well.

The seller

Electronics by Theremin Hero

Electronics by Theremin Hero logo

Glasgow, UK
0 orders since Apr 15, 2026