Found in a Popular Electronics from the 90s, this game can be seen in other configurations on this site. The circuit uses components that are still common today.
The gated oscillator in the figure bellow tums on when a “0" Iogic Ievel is applied to its input....
In this project, from a Japanese magazine of 1973, only one channel of a stereo amplifier of 20 W...
We find this circuit in the manual of the used integrated circuits. The manual is from Linear...