TTL Counter (CB21360E)

This counter from 0 to 9999 was found in English documentation. The power source must be 5V with at least 1A.

Inductance bridge (CB23524E)
This useful inductance bridge was found in a Radio Electronics from September 1963. The...
Hendset Inductive Pickup Link 2 (CB4527E)
This circuit is a handset receiver that picks up the signal emitted by a coil under the rug or...
Musical Doorbell (CB24397E)
This circuit found in the October 1975 issue of Radio Electronics magazine uses an integrated...