This 5 W transistor amplifier for the car was found in an English documentation from 1969. The transistors are from that time and the transformer is of a special type.
This alarm does not interrupt its operation when the power is cut. A battery is kept at a constant...
The sophisticated signal tracker/follower with a JFET and integrated circuit 741 was found in a...
This circuit, found in a publication from the 1970s, produces a 1 Hz sinusoidal signal....