Here is another classic chess computer from the late 70s. The JS&A Chess Computer is powered by a Fairchild F8 8-bit processor (1.78 MHz) with 2kb ROM and 256 bytes RAM. It doesn’t have a sensory board but you can enter the moves with the buttons on it.
This chess computer is famous due to the Kaprov challenge and legal trouble with Data Cash Systems. The above video shows it in action.