Flash-activated flash (CB6749E)

This circuit was suggested by General Electric in 1970 documentation. It makes use of a photo-SCR or LASCR, an uncommon component today.

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28 V to 5 V converter (CB7331E)
Found in National Semiconductor documentation from the 90's, this circuit has an output current of...
Transistor Characteristic Checker (CB3903E)
With this circuit it is possible to raise the characteristics of a transistor by checking its gain...
Current Transmitter for Resistive Loads (CB14316E)
The circuit presented is from the Linear Applications Handbook of the National Semiconductor of...