In the past few years, we have covered plenty of classic chess computers. The Chafitz Boris 2.5 is also worth a look. It is a modular chess computer from 1980 with an estimated rating of 1800 ELO. It has a plug & play design. It is powered by a 2Mhz processor with 2KB RAM.
Boris 2.5 doesn’t have a sensory board but shows the moves through its display. You can find out more about it here.