TTL Counter (CB21360E)

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

Transistor Monostable (CB19361E)
Equivalent transistors, such as the BC548, can be used in this circuit that we find in...
Battery condition indicator (CB9547E)
Found in a 90s documentation, this circuit makes use of D1, a switching diode that is uncommon today....
IR Remote Control Transmitter (CB16881E)
This is the suggested transmitter circuit for the CB16880E. The emitting LED must be a...