Used in satellite TV receptions in the 1980s, this circuit was found in the March 1980 issue of Radio Electronics magazine. Note the board layout.
This circuit activates a water pump when the sensors detect lack of humidity in a vessel, for...
This circuit was obtained from an Electronics World of 1969. General-purpose transistors can be...
This circuit was found in many record players with crystal phono pickups. The output power is 800...