2N4987 and 2N4990 (IP057E)

Unilateral switch (SUS) with 8 V of trigger voltage. This component is used to control SCRs and other applications.

Photodiode Detector (CB1588E )
This circuit, suggested by Philips Components (1980), uses a fast voltage comparator and requires...
Automotive Light Reminder (CB26298E)
This circuit warns you if you forget to turn off the car light and leave it. The circuit is from a...
Accented Metronome (CB5336E)
This circuit was found in an ancient American documentation. The transformer is the type used in...