This circuit emits a warning sound when night falls. The circuit is from a Hands On Electronics from the 90s. The Sensor is a common LDR and R6 adjusts the trigger point.
This circuit for vehicular use is from an 80's American publication. The circuit has a light...
Based on Texas Instruments documentation, this circuit is based on the BQ2000 a circuit used to...
We found this circuit in the 1994 Linear Applications Handbook by National Semiconductor. The...