Microphone Amplifier (CB6204E)

This amplifier was found in a 1969 Mullard documentation. The circuit uses transistors that have as modern equivalents the BC548 and BC549.

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Rain Detector (CB25963E)
We found this circuit in the May 1996 Electronics Now magazine. The relay must have a voltage...
TTL Optical Interface (CB14159E)
The shield circuit shown is from the 1994 Linear Applications Handbook by National Semiconductor of 1994....
DC Motor Control with Direction Change (CB913E)
Up to 0.5 A DC motors can be controlled by this circuit. Direction change is achieved by a logic...