This circuit was obtained from a 1965 Radio Electronics. The semiconductors used admit modern equivalents. The high voltage coil is an automobile ignition coil.
Mouser Electronics has in stock Amphenol FCI Booltrack ™ connectors for robust connectivity...
In the figure we show an application in which the 4093 excites a stage with 4 transistors in the...
This siren was found in a 1980s documentation. The circuit makes use of very old operational that were...