The transistor on this mixer can be any general-purpose transistor. The number of entries can be changed. We found it in an old documentation. Input and output cables must be shielded.
This circuit is suggested by Sanyo and is based on the integrated circuit LA4430, manufactured by it. With a...
In the figure we have the way to configure an OR gate using 3 gates of the 7400. The circuit is...
This circuit was found in Popular Electronics from 1993. The 1458 consists of a double 555. The...