This timer for long time intervals is from the 1990 Motorola Linear Databook. The setting applies to other operational ones and component values are given below the diagram.
This ultra-simple circuit need a carbon microphone to operate. The circuit must be powered from D...
In the figure we have the circuit of an amplifier for alternating signals with 10 times gain,...
This circuit was found in an old American documentation aimed at amateurs. The circuit generates...