Blown Fuse Alarm (CB6109E)

We found this circuit in a 1967 Electronic design. However, it can be easily implemented even today as it uses only common diodes.

| Clique na imagem para ampliar |

Water or Moisture Alarm (CB11992E)
The contact of the sensor with water or humidity causes the relay to close its contacts. The...
Siren (CB4181E)
This siren was found in a 1980s documentation. The circuit makes use of very old operational that were...
Comparator with an operational (CB6501E)
This circuit was obtained from Motorola documentation from 1969. The setting applies to other...