The Odhner Arithmometer was a very popular pinwheel calculator invented in Russia in 19th century by a Swedish immigrant called W. T. Odhner. Like most of pinwheel calculators, it worked with an engine formed by a set of linked wheels which could perform the four basic mathematical operations within a machine of reduced size.

Diego Cueva worked on a diy emulator called Duimometer, made with Arduino UNO. See how it works in the video below and look at the sketch here.