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 experimental good sensibility radio was obtained from a 1968 magazine. The magazine no longer...
This circuit is based on the bistable configuration, but with the difference that the values of...
We found this circuit in a 1977 publication. With it we can test general purpose operational...