Preheating circuit (CB7187E)

This circuit was found in a General Electric manual from 1970. Its purpose is to provide a preheat to a filament lamp.

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Low hysteresis dimmer (CB7216E)
Found in 1969 RCA documentation, this dimmer uses a dual time constant setting to achieve better...
Modulated infrared emitter (CB7251E)
Found in a 1968 Mullard manual, this circuit can function as an infrared audio link. The...
Voltage Sensitive Switch (CB4598E)
This circuit trips when the input voltage exceeds 30 V. Its base is a DIAC and it can be used to...