Powerful IR Emitter (CB26030E)

This modulated circuit was found in the November 1997 Electronics Now magazine. The power transistor can be any MOSFET,

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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...