Engineer James Brown has created a mini-computer out of Lego.

At first, Brown wanted to create a mechanical keyboard with screens instead of buttons. In the process, the enthusiast decided to build a computer out of Lego because he was interested in customizing tiny components in a small package. The device is powered by old 9-volt batteries and bricks with electrical contacts that Lego stopped making back in the 90s. This is enough to run the screen and the STM32 microcontroller with a 48 MHz Arm Cortex-M0 processor and 16 KB flash memory. Brown himself wrote the programs for this tiny computer, and also managed to display an image from Doom on it. The displays are hidden behind translucent Lego bricks. He spent $40 on the entire project.