Found in a 1968 Motorola manual, this DC circuit uses components from the era. The circuit fires in microsecond times. The Q3 transistor must be according to the controlled load.
This circuit is from the Motorola Linear Databook published in 1990. The circuit for 1 kHz can be...
August 2017 - Mouser Electronics is announcing the availability of TDK ICS-52000 microphones with...
This interesting automotive alarm was found in an English publication from the 1980s. The circuit...