First pulse preserver (CB9259E)

This circuit was found in a 1967 EEE. The components are from that time, but the circuit can be implemented with modern equivalent components.

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Field Strength Meter with Multimeter (CB12862E)
This field strength meter is intended for the VHF range, above 100MHz. The lowest voltage or...
Photo Sensitive Receiver (CB12446E)
We found this circuit in a 1994 documentation. It can be implemented with the indicated...
Blinker (CB21351E)
This simple blinker for incandescent lamp was obtained from an English documentation. The power...