The TAA865 integrated circuit used in this 1986 project is no longer common today. The circuit is a documentation of the time and the time is given by RC that has indicated the maximum values.
The circuit presented, from 2006, serves to control loads at a distance, robots, etc. It can be...
This circuit is given in two versions, having been found in a publication from the 90s. The second...
I found this circuit in a documentation for radio amateurs from 1975. The FET could be the BF245....