Get the latest tech news

Leningrad-1: a 44-IC Soviet style ZX-Spectrum clone

More photos can be viewed on this page. In modern times, when it costs about as much to buy an old Spectrum as it does to build your own, building a Spectrum based on the original circuit is severely hindered by the fact that these chips were only made for the Spectrum and different versions were used on each PCB revision, making them extremely rare today.

Language: English | Русский Introduction When Sinclair released the original ZX Spectrum in 1982, it was designed with a chip called the ULA, short for 'uncommitted logic array'. This chip combined a large amount of logic functions into a single custom-made package, significantly lowering the component count and cost. The ULA also generates a lot of heat, so due to being installed without a heatsink and placed into a case with no ventilation(as was done in the original Spectrum), overheating is a common failure point.

Get the Android app