Busy Line Indicator (CB18711E)

This busy line indicator is very simple, serving for analog lines. The supply is made by two batteries and the transistors admit equivalents.

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Powerful current converter (CB5096E)
This circuit can convert an AC voltage signal into a current up to 1 A for powering a load. The...
Current limiter (CB21157E)
This circuit was found in a Popular Electronics from the 90's. The operating curve is given next...
MAX20733 and MAX20745 Switching Step Down Regulators
April 2017 - The new Maxim Integrated MAX20733 and 20745 switched regulators are available from...