Micropower amplifier (CB7461E)

This amplifier was found in an Electronics Now from the 90s. The FETs are part of a CD4007CB.

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Solar Oscillator (CB13887E)
This circuit is from an old documentation of Radio Shack from the 70s. The transistor should...
Automatic 555 Hand Flashlight (CB25504E)
When the power is cut off, this circuit keeps the flashlight on for a while, allowing it to be...
Sequential LED (CB7046E)
This circuit was obtained in an old Popular Electronics. It makes use of quite common components....