This small signal amplifier circuit was found in Motorola's 1969 documentation. The FET and the transistor can be of any type and is battery powered since the consumption is very low.
This two-tone buzzer can be powered by a solar panel. The circuit is from a 1991 documentation. The...
This circuit can generate signals from 2 to 15 MHz or 4 to 22 MHz depending on the used components...
This simple reducer can supply devices that require currents up to 1 A. The power transistor must be...