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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150 Hz to 1.5 kHz Wien Bridge Oscillator (CB25907E)
This circuit was found in the December 1995 issue of Electronics Now magazine. The circuit...
Photocell Motor Control (CB14945E)
In the figure we have the photo-conductive way of using a photocell to control a small motor with...
Synchronized Adjustable Sinusoidal Oscillator (CB18248E)
This circuit, which can be used on percussion instruments, has the oscillation point adjustment made in...