Double limit comparator (CB9581E)

Found in documentation from the 1980s, this circuit makes use of general-purpose diodes and requires a symmetrical power supply.

| Clique na imagem para ampliar |

Instrumentation AC Amplifier (CB12124E)
This circuit was obtained in a 1979 publication. The operational amplifier is of the type with...
Transducer 555 Oscillator (CB8119E)
This circuit was obtained in a 90’s Popular Electronics. The frequency depends on C1, a component...
2-Tone Siren (CB18189E)
Because it uses TTL integrated circuits, this siren must be powered by 5 V or as indicated with D1 to...