Electronics Circuit Diagram

Sometimes it is useful to record telephone conversations. The telephone recorder will silently record both sides of the conversation. Below schematic shows the simple design of an Automatic Telephone Conversation Recorder Circuit Board Diagram and Components Parts List. This circuit design will automatically switching ON of the tape recorder when the handset is lifted thus the tape recorder should be kept loaded with a cassette.

Automatic Telephone Conversation Recorder Circuit Components List

SEMICONDUCTORS
T1 BC548
T2 SL100
D1-D6, D8 1N4001, Rectifier Diode
D7 12V Zener

RESISTORS
R1 18kOhm
R2 1.8kOhm
R3 470kOhm
R4 100kOhm
R5 4.7kOhm
VR1 1kOhm Preset

CAPACITORS
C1 1000μF/25V
C2 0.033μF/100V Polyester
C3 100μF/25V

OTHER
X1 230V AC Primary to 6V-0-6V 100mA Secondary Transformer
RL1 6V, 100W

Get more information regarding the design of Simple Automatic Telephone Conversation Recorder Circuit Board Diagram here (source: electronicsmaker.com)

Related Posts:

• Build Simple Sound Trigger Circuit Diagram using 2N2222
• Simple Track Detector Circuit Diagram using NE556 Timer
• Simple DC to DC Converter Circuit Diagram using DS3906 and MAX5025 IC
• Designing Simple Digital Multimeter Circuit Diagram using ADD3501
• Simple Buck-Booster Converter Circuit Diagram using AW60MCU