Telephone decoder (CB10151E)

This circuit was obtained in an 80s documentation on telephony. The components used are TTL, and the power must be made with 5 V.

| Clique na imagem para ampliar |

Code Practice Oscillator (CB940E)
This circuit uses one of the first comercial transistor and is from a 1958’s magazine. Tone...
Indicator for transmitters (CB7017E)
This circuit is intended to indicate the operation of transmitters with powers above 5 W. The...
er Coupling Crystal Oscillator (CB12251E)
Emitt This crystal-controlled oscillator can generate signals from 100 kHz to over 30MHz. The...