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电话录音电路图/Telephone recorder

时间:2015-07-15 10:14:55 来源:中国百科网 点击量:736

Part

Total Qty.

Description

Substitutions

R1

1

270K 1/4 W Resistor

R2

1

1.5K 1/4 W Resistor

R3

1

68K 1/4 W Resistor

R4

1

33K 1/4 W Resistor

C1

1

0.22uF 150 Volt Capacitor

Q1, Q2

2

2N4954 NPN Transistor

D1

1

1N645 Diode

MISC

1

Wire, Plugs To Match Jacks On Recorder, Board, Phone Plug

Notes

1. The circuit can be placed anywhere on the phone line, even inside a phone.

2. Some countries or states require you to notify anyone you are talking tothat the conversation is being recorded. Most recoders do this with a beep-beep.Also, you may have to get permission from the phone company before you connectanything to their lines.

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电话录音电路图/Telephone recorder

Telephone Recorder

This nifty little circuit lets you record your phone conversationsautomatically. The device connects to the phone line, your tape recorder'smicrophone input, and the recorder's remote control jack. It senses the voltagein the phone line and begins recording when the line drops to 5 volts or less.

Schematic


Parts