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Telephone Audio Interface - Electronics DIY
http://electronics-diy.com/electronic_schematic.php?id=483
Audio from a telephone line can be obtained using a transformer and capacitor to isolate the line from external equipment. A non-polarized capacitor is placed in series with the transformer line connection to prevent DC current from flowing in …
Telephone interfacing circuits - Audio | Video | Circuits
https://www.epanorama.net/circuits/teleinterface.html
Modern hybrid circuits consists only of one audio isolation transformer, two operational amplifiers, resistors and some capacitors. and the most modern approaches try to avoid that transformer altogether by using active electronics …
The phone device – basic schematic
http://users.utcluj.ro/~dtl/TF/Cursuri/LAB1_eng.pdf
The phone device – basic schematic Figure 1 - Basic schematic of the telephone device Active state (OFF - HOOK) : CF1 – 2, CF2 – ON Inactive state (ON - HOOK) : CF1 – 1, CF2 – OFF CS – short-circuits the speech circuit during the dialing process to avoid distorting the dialing impulses due to the complex impedance of the speech ...
Electronics-DIY.com - Electronic Schematics Telephone Related
https://electronics-diy.com/electronic_schematics.php?schematics=telephone&circuit=Telephone%20Related
Volt Ampere Meter measures voltage of 0-70V or 0-500V with 100mV resolution and current consumption 0-10A or more with 10mA resolution. The meter is a perfect addition to any power supply, battery chargers and other electronic projects where voltage and current must be monitored. The meter uses PIC16F876A microcontroller with 16x2 backlighted LCD.
DIY and Hi-Fi Audio Schematics
https://diyaudioprojects.com/Schematics/
DIY and Hi-Fi Audio Schematics. This is our collection of DIY and Hi-Fi Audio Schematics. Feel free to send us your hi-fi audio schematics and we will add them here. If you have built any of these circuits, we would love to hear from you so send us your comments. Many of these diy Audio Books contain schematics.
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