Binary Counter using lamps (CB6606E)

This is a transistor flip-flop suggested by General Electric in a 1966 paper. The transistors are of the time and can be used equivalents.

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Constant Current Source (CB6628E)
This 1 A circuit was found in a Philips documentation from 1966. The transistor is of the time,...
Micro FM Transmitter (CB18590E)
This FM transmitter circuit was found in a Japanese publication in 1975. Equivalent transistors can be...
5 V regulator 741 (CB19113E)
In the figure we have the basic configuration of a 5 V regulator using an operational 741. In this...