This circuit for a simple alarm system was suggested in an article in Electronics Now magazine. The circuit has a small power stage that can be changed.
The indicated circuit generates frequencies in a range from approximately 500 Hz to over 5 kHz...
August 2016 - Mouser Electronics is offering the DC / DC converters from Torex Semiconductor with...
This circuit, which appears elsewhere in this section, is from a 1969 Electronic Experimenter...