CMOS Siren (CB26157E)

Found in the 1991 Electronics Experimenter Handbook magazine, this circuit has good power and is recommended to be triggered by light.

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455 kHz FI amplifier (CB8410E)
This circuit is from a 90s Popular Electronics. The circuit employs a ZN461E that is not a common...
Codecs and Audio Circuits
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1.5 V White LED Flasher (CB20428E)
This circuit switched with the help of small inductors produces a peak voltage above 20 V that is...