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FM Telephone Bug

Here is a simple transmitter that when connected to a phone line, will transmit anything on that line (execpt the dial tone) to any FM radio. The frequency can be tuned from 88 to about 94Mhz and the range is about 200 feet. It is extremely easy to build and is therefore a good, useful beginner project.


Обозначение

Описание

R1

180 Ом

R2

12 КОм

C1

330 пФ

C2

12 пФ

C3

471 пФ

C4

22 пФ

Q1

2SA933

D1, D2, D3, D4

1SS119

D5

Кр. светодиод

S1

Переключатель

L1

Настроечная катушка

Notes