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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SCR Dimmer (CB14822E)
This traditional dimmer configuration for incandescent lamps and heating elements was found in an...
Negative Voltage Generator (CB16629E)
This is another possible version of a negative voltage generator using a 555 integrated circuit. The...
Vibrating Wire Oscillator (CB23899E)
A wire vibrating between the poles of a magnet works as a frequency pattern in this oscillator found in...