Telephone Spy (CB18047E)

Details: Written by: Newton C. Braga

This circuit transmits the audio signals from a telephone line to an FM receiver placed nearby. The coil has 4 turns of wire 28 in the form of 1 cm without core. The trimmer is 2-20pF or greater.

| Clique na imagem para ampliar |

Circuit Bench

Conductivity Meter (CB13503E)
This circuit measures the conductivity of a saline solution, which is affected by the electrolysis effect....
+5 V to -5 V converter (CB19002E)
This circuit provides a negative voltage of -5 V with a current of up to 100 mA. The circuit is...
Line voltage compensation (CB8816E) This circuit for the alternating current line (AC line) was found in a 1965’s General Electric documentation. No information was given about the transformer. a href="image"
Line voltage compensation (CB8816E) This circuit for the alternating current line (AC line) was...

Telephone Spy (CB18047E)

Latest

Circuit Bench

Buscador de Datasheets