Institute Newton C. Braga

Circuit Bench

Integrated mixer (CB21976E)
This mixer with the integrated circuit CA3130 was obtained from an English publication from 1977....
13.2 V regulator with 12 V Zener (CB15746E)
The voltage of 13.2 V is closer than what we find in a car battery than 12 V. Thus, a 13.2 V zener...
Alarm with sound (CB24382E)
This circuit is for a siren that can be used with any of the above alarms and also other types. The...