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.
The frequency of this oscillator depends on the inductor and capacitors in parallel with it. In...
The acquisition of data, from a transducer, so that these data can be converted to digital form...
Indicated by a Popular Electronics of the 90s originally to measure the light determining the exposure...