您当前位置: 首页> 商友学堂> 商业文库> 电话录音电路图/Telephone recorder

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:864

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.

1 2 3 4 5 6
原材料 工业品 服装服饰 家居百货 小商品 商务服务 更多分类

·混合气充装规格2025-06-07

·海南建造冷库设计制造公司2025-06-07

·宁德液氧气瓶规格2025-06-07

·武威水泥彩砖供应2025-06-07

·广东小型冷库设计维修2025-06-07

·江山食堂承包企业2025-06-07

·湖北金属粉末包装桶公司2025-06-07


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