This small receiver for the medium wave range was found in Radio Electronics magazine from July 1958. The circuit is for listening to headphones and powered by batteries.
If the reader has an old MSX still working, it can be used as a microcontroller for your robotics...
This circuit was found in a 1993 Electronics Hobbyst Handbook. The circuit operates in the FM...
In the figure we have the way to simulate an SCR using two complementary general-purpose...