Alpha and Theta waves modulator (CB26155E)

This circuit, which presents a certain danger and should be used with caution, was found in the Electronics Experimenter Handbook magazine.

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Logic Input Motor Control L165 (CB15144E)
We found this shield circuit in the SGS Integrated Circuits Manual of 1982. The circuit is...
Rhythmic Lights (CB23916E)
This circuit with transistors and a crystal microphone appeared in Radio Electronics magazine in...
UHF Booster For TV (CB12592E)
This circuit amplifies the signals in the UHF band starting at 470 MHz, reaching just over 900...