This circuit was found in the August 1994 issue of Electronics Now magazine. The 4046 is uncommon these days and the frequency range is given by C1.
This sophisticated photometer that has a light comparator with LED indicator came out in an...
This circuit compares the input voltages by providing an output according to the curve next to the...
June 2017 - ECM032 series of SMD quartz from ECS crystals can now be obtained from Mouser...