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 signal booster that ranges from long waves to about 30 MHz is recommended to be used with...
We find this circuit in an American publication of 1978. It is intended only for cars that have...
This circuit, which we found in SGS's 1982 linear semiconductor manual, does not need a...