Triggered Oscillator (CB18275E)

The circuit shown in the figure generates a rectangular signal that depends on R and C, when its input goes to the high level.

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AC Amplifier with LM3900 (CB14180E)
In the figure we have the basic application of an LM3900 transconductance amplifier, as suggested by...
Up to 3 minutes timer (CB21429E)
We found this circuit in a 1967 General Electric SCR manual. The time is set to R1 and depends on C1...
AC Power Switch (3) (CB12415E)
This circuit is from a 1995 Electronics Now. With it we can connect loads of power using low...