Found in the November 1999 issue of Electronics Now magazine, this circuit generates a 6.67 Hz signal from a 4.1952 Hz crystal.
This circuit was originally created to monitor signals from a remote-control transmitter for the...
In this circuit the CA3140, an operational amplifier, is used as a comparator with the zener diode...
This circuit was found in old documentation. The frequency depends on R1 and C1. For the...