Bass Control (CB21294E)

This circuit with losses of 20 dB at 350 Hz was found in older documentation, but it applies to modern preamp and amplifier circuits.

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Telephone Amplifier (CB18148E)
This simple telephone amplifier can be used as an auxiliary amplifier for additional listening, without...
TTL Optical Link (CB23670E)
This circuit can be used in fiber optic links or even direct links to microcontrollers and other...
Twilight Switch (CB11511E)
This article was obtained in a French magazine Nouvelle Electronique from 1994. It can be easily...