Bath control (CB21373E)

This hydromassage circuit was found in a 1967 General Electric publication. The SCR is according to the power of the heating element.

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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...