We found this circuit in documentation from the 1980s. The integrated circuit used is uncommon today, and the use of a modern equivalent should be analyzed.
We found this circuit in the Linear Applications Handbook of the National Semiconductor of 1994....
We found this circuit in a 2004 documentation. The trimmer is common for 30 pF or 40 pF and the...
This circuit activates a relay when the sensor receives light indicating dawn. A relay with a 4k7...