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This circuit was obtained in 1965 General Electric documentation. SCRs can be modern common equivalents. The circuit fires with positive pulses. The load can be up to 7 A.
This 1967 Raytheon circuit uses a Raystor, an optical coupler with a lamp and an LDR. The circuit...
The basic idea of this circuit is to indicate the tolerance of a capacitor by reference to a...
This circuit is from an English publication from 1973, but can be easily assembled today. 2N718 can...