This circuit is based on the TDA3810N. We found it in the March 1992 issue of Radio Electronics magazine. The circuit consists of an audio processor capable of working with two audio channels.
September 2016 - can already be purchased at Mouser Electronics the Robot Scribbler S3 from...
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...
This simple transistorized game that appears in other versions in this section and website, was...