Alarm siren (CB26231E)

This circuit with two 555s was found in the Encyclopedia of Electronic Circuits volume 5 of 1995. The power is high due to the use of 2N3055.

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5 Channel Audio Switch (CB4653E)
This circuit was obtained from a 1994 publication. Its purpose is to digitally switch 5 audio...
Micro Power Comparator (CB14174E)
The circuit shown is from the National Semiconductor's Linear Applications Handbook. The CI is not...
Nicad charger (CB9540E)
In this charger, the charging current is basically limited by the LEDs. The transformer is a low...