Institute Newton C. Braga

Circuit Bench

Alarm tone generator (CB8445E)
Found in a documentation from the 90's, this circuit already includes an amplification stage. The...
48 to 5 V converter (CB8183E)
This telecommunications circuit was found in a National Semiconductor publication from the 90s. It is...
Timed Alarm (CB4302E)
We found this circuit in a 1986 documentation, but it can be easily assembled even today by the...