TTL Counter (CB21360E)

This counter from 0 to 9999 was found in English documentation. The power source must be 5V with at least 1A.

Twilight switch (CB24176E)
This circuit for incandescent lamps was found in the February 1972 Radio Electronics magazine. The triac is...
Time Control Timer (CB4964E)
This timer circuit was found in a 1980s documentation. The integrated circuit is the 555, which...
Cassette Tape Retriever (CB10832E)
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...