Call indicator (CB7235E)

We found this circuit in an old neon lamp application manual. The circuit stores a call. The resonant reed-relay is not a common component today.

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Telephone audio interface (CB8662E)
Found in a 90s Popular Electronics, this circuit interfaces the telephone line with an audio...
Regulator 78xx (CB17602E)
In this circuit, xx can be 05, 06, 12 or 15 for output voltages of these values. The integrated circuit...
Couplers, Antennas, Diplexers and Filters TDK
April 2017 - TDK chip-on-ceramic components can be obtained from Mouser Electronics for 2.4 GHz...