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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Multimeter protector C (CB8383E)
Found in a 1966 Electronics World, this circuit applies to the protection of any analog...
Variable Peak Detector (CB22130E)
We found this circuit in an English documentation from the 80's. The circuit can make use of...
12 V to 220 V converter 555 (CB17238E)
The power of this converter is not the greatest, it can only supply small fluorescent lamps,...