TL;DR
The Tang Nano 9K is an affordable FPGA (Field-Programmable Gate Array) development board, typically priced around $15. Recently, [ThePartsBin] has taken this board and transformed it into a retro-style computer, utilizing the Gowin GW1NR-9C FPGA, which features 8,640 Look-Up Tables (LUTs). Despite its modest specs, the board can run a 36 MHz RISC-V CPU and includes 8 MB of RAM, HDMI output, stereo audio, two USB ports, and an SD card reader.