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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741 Sine to Rectangular Converter (CB13875E)
This circuit, in addition to transforming a sinusoidal signal into a square, shifts its phase. The...
Differential Amplifier (CB19241E)
The transistors on this circuit can be the BC548. The circuit is from English documentation from...
Voltage Doubler (CB20196E)
In the figure we have three voltage doubler configurations that can be used in high and low...