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  • Cut Phone Line Detector circuit diagram

    2016-02-11 18:18:3067

    This circuit is used to detect whether your phone line is active or not. Components List: R1,R2,R3 = 22M Ohms R4 = 2.2M Ohms C1 = 0.47uF/250V Mylar cap...

  • Nokia 1100, 2300, 2600, N-Gage cell phones internal

    2016-02-11 17:41:5566

    pinout 6 pin Nokia 2-rows cellphone internal specialconnector at the mobile phone Pin Signal Description 1 DAI CLK only for Nokia 1100, 2300, 2600 ? 2 ...

  • Cell-Phone calling Actuator (TS555CN)

    2016-02-11 17:36:0566

    Drives a relay when an incoming call is detected Circuit diagram: Parts: R1,R3,R4,R6______1M 1/4W ResistorsR2_______________3K9 1/4W ResistorR5,R8_____...

  • Wireless infrared headphones receiver principle

    2016-02-11 16:35:2462

    This article describes a wireless infrared headphones receiver principle. The principle is simple there, we recommend that combine text carefully read ...

  • Siemens S10 S11 S1088 cell phones

    2016-02-11 16:25:2687

    full pinout 16 pin cellphone 2 rows w/antenna right specialconnector at the cellular phone Pin Name Description Direction 1 LOAD Charging voltage IN 2 ...

  • Mobile Phone Travel Charger (BC548)

    2016-02-11 13:14:5278

    This article briefly describes the Mobile Phone Travel Charger (BC548). This principle is easy to understand, but also very practical. Depth understand...

  • Telephone off-hook indicator

    2016-02-11 11:45:5768

    Description. The circuit depicted here can be used as an indicator when the telephone receiver is off-hook. The circuit can be in corporated with old t...

  • Speaker Microphone Circuit

    2016-02-11 07:52:4168

    Related posts: Dynamic microphone to electret microphone input555 Tone Generator (8 Ohm Speaker)Low Noise Microphone PreamplifierMicrophone mixerMS Ste...

  • FM Wireless Microphone

    2016-02-11 05:24:3363

    Here is a very simple, inexpensive and interesting project which provides lot of fun to a home experimenter or hobbyist. This simple transmitter can tr...

  • Nokia 2650 cell phone internal

    2016-02-11 04:36:1465

    pinout 6 pin Nokia 2650 cellphone specialconnector at the mobile phone backside Pin Signal Description 1 Tx 2 Rx 3 Vpp 4 MBUS 5 GND Source:www.pinouts....

  • Cut Phone Line Detector CIRCUIT (1N4006)

    2016-02-11 04:20:3163

    This article describes the Cut Phone Line Detector CIRCUIT (1N4006). The content is very simple, very helpful. Components in this article can help you ...

  • iPhone / iPod Touch DIY Microphone

    2016-02-11 04:13:3986

    iPhone / iPod Touch DIY Microphone If you have ever wanted to plug in a pro-quality microphone and headphone to an iPhone or iPod touch, pay attention ...

  • Cassette automatically telephone recording circuit

    2016-02-11 00:32:2163

    Digital Phone Recording Kit contains everything you need to record all of your important home, office, cell calls and room conversations discreetly.To ...

  • Nokia N70, N90 cell phone internal

    2016-02-10 22:37:5767

    pinout 7 pin Nokia N90 cellphone specialconnector at the mobile phone 7 pin Nokia N70 cellphone specialconnector at the mobile phone Pin Signal Descrip...

  • Cell phone charger circuit diagram FSEZ1307

    2016-02-10 22:03:1266

    Battery charger circuits This cell phone charger circuit diagram electronic project is based on the FSEZ1307 third-generation primary side regulation (...

  • The multi-circuit circuit telephone

    2016-02-10 19:12:4268

    This article describes a telephone multifunction circuit schematic. In order to better grasp the principle of combining text, please understand this sc...

  • Siemens C30, M30 cell phones

    2016-02-10 17:24:0964

    for data/flash cable only 14 pin Siemens C30 cellphone specialconnector at the mobile phone (keypad up) Mobile phone interface pin Description 1 GND 2 ...

  • Stereo Parabolic Microphone Using 1458

    2016-02-10 17:16:36144

    This circuit is a stereo amplifier for a high sensitivity stereo parabolic microphone that able to used for listening to distant sounds. Typical parabo...

  • Wireless headphones receiver circuit schematic

    2016-02-10 15:22:4165

    The wireless headphones receiver presented is an standard application of ZN415 produced by Ferranti ( short wave receiver). ZN415 assures a quality rep...

  • Soft musical telephone ringer (1N4009)

    2016-02-10 15:06:3864

    This article describes the Soft musical telephone ringer (1N4009). The content is very simple, very helpful. Components in this article can help you un...

  • Fet Microphone Mixer Circuit

    2016-02-10 15:00:4085

    A JFET transistor-is used as a high-to-low impedance converter and signal mixer. Input impedance is approximately 50.0 kQ but it can be increased by in...

  • Stereo Mixer for Microphone with 2 Channels

    2016-02-10 14:00:2165

    Figure 1 The circuit was designed to provide 2 channels on a stereo mixer that will be used for microphones while having a crossfader operation. NE5532...

  • Sharp GX15, GX30, GX30i, GX32, TM100 cell phones

    2016-02-10 13:53:5664

    for data/flash cable only 10 pin cellphone specialconnector at the mobile phone (keypad up) Pin Signal Description 1 Gnd 2 Rx 3 Tx R=1K to 5v 4 VPPFLAS...

  • Telephone pickup preampliifer

    2016-02-10 13:01:4766

    Description. Here is a simple circuit based on IC uA 741 that can be used to pickup voice from telephone lines without even contacting the line. If a h...

  • Low Noise Microphone Pre-Amp with Op-Amp

    2016-02-10 11:25:00239

    Microphone pre-amp is a very simple circuit, most all low noise op-amp will be sufficient for this circuit (TL071, TL082, OPA371, NE5534, etc). This ci...

  • Telephone In-Use Indicator

    2016-02-10 11:16:4165

    Telephone In-Use Indicator Description: This circuit will illuminate a LED if one of your telephones is in use. It should work in all countries (Includ...

  • Isolated intermediate voltage telephone ringer

    2016-02-10 10:36:1469

    A ringing voltage power management circuit is configured to extract an isolated high-value intermediate voltage from a central office powered digital s...

  • NEC N21, N22, N223i cell phone

    2016-02-10 10:09:3862

    pinout 18 pin unspecified cellphone specialconnector at the mobile phone (keypad up) Pin Signal Description 5 GND 10 Tx 11 Rx Source:www.pinouts.ru Rep...

  • Parallel Phone Tap Circuit Diagram

    2016-02-10 06:50:3765

    In a recent article, I discussed the difference between parallel and series telephone taps. In this article, I present a very simple and reliable paral...

  • Telephone Hold Circuit Circuit

    2016-02-10 05:51:5766

    When SI is pressed, the SCR fires, and places LED1 and Rl across the phone line. The line voltage drops to about 20 V, which holds the connection to th...

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