Microcontroller controlled dimmer (CB25087E)

This circuit was found in a Radio Electronics magazine from October 1987. It can be used as a shield for incandescent and heating elements.

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16-channel TTL sequential (CB19316E)
This circuit was found in an American publication from the 1980s. In the original version it...
AC Signals Comparator (CB3888E)
This circuit is from an American documentation of the 1980s. The circuit can be implemented with more...
Four Transistors Reflex Receiver (CB18301E)
This is a diagram of a 1958 commercial receiver. The circuit was found in documentation at the...