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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5 V x 10 A regulator (CB16688E)
This simple regulator provides a voltage of 5 V with a current of up to 10 A. The transistor must...
Wireless Alarm Transmitter (CB25208E)
We found this circuit in the May 1989 issue of Radio Electronics magazine. The circuit uses...
Current Transmitter for Resistive Loads (CB14316E)
The circuit presented is from the Linear Applications Handbook of the National Semiconductor of...