Telephone line tester (CB8710E)

Details
Written by: Newton C. Braga

 

     Found in a Popular Electronics from the 90s, this circuit checks the presence of voltage on a common telephone line. This check can also be done with a multimeter.

 


| Clique na imagem para ampliar |

 

 

 

  

Buscador de Datasheets


N° de Componente 

Circuit Bench

  • Temperature alarm (CB7529E)

           This circuit triggers producing a loud sound when a change in temperature is detected. The circuit...

  • Differential Pair (CB6134E)

          This differential amplifier, found in a 1964 Electronic Design, has a gain of 30. The setting can be...

  • Light-operated relay (CB8285E)

           This circuit from Motorola is from 1968, appearing elsewhere on this site. The transistors admit...

Latest