This simple component tester was found in the October 1997 issue of Electronics Now magazine. The circuit is powered by power grid through a simple power supply.
This circuit synthesizes a sinusoidal signal from logic pulses that can be obtained from an...
With the light falling on the LDR, the relay closes its contacts by activating a warning system. The...
This circuit was found in old English documentation. It can be improved by using resistors of...