This circuit was found in a 1992 publication. What it does is to light an external lamp when it gets dark. The trigger point adjustment is made in a potentiometer or trimpot and the sensor is a common LDR.
This circuit produces sequential outputs for the activation of several appliances in a residence, thus...
Pressing and releasing S, the capacitor C1 charges and discharge slowly through the oscillator...
This circuit uses an operational that is not currently common. We found it in an old American...