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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Quadrature Generator for Transistor and SCR Testing (CB3807E)
Quadrature Generator for Transistor and SCR Testing This circuit was found in US 1980s...
3 and 6 V Stabilized Solar Power Supply (CB18661E)
This circuit, with output currents up to 500 mA, can stabilize or regulate the output voltage of a...
0 to 13.8 V x 3A power supply (CB16878E)
This circuit that uses only transistors that are still common was found in a 1995 documentation. The TIP41...