Quick Start Siren (CB25765E)

We found this circuit in the October 1994 Electronics Now magazine. The CMOS IC is uncommon these days and the output is low power.

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Band Pass Filter II (CB19686E)
This filter, found in an old manual, has characteristics of reduced overvoltage given by the graph...
Class A power amplifier (CB22236E)
This circuit is from an American publication from the 60's. The power is on the order of 600 mW....
Positive-Triggered Half Monostable (CB121E)
One 40108 Schmitt inverter or one 4093 gate can be used as a half monostable to be triggered by...