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  • Full-duplex doorphone with 3 wires connection CIRCUIT (TL084

    2016-02-02 07:52:2192

    This article describes a Full-duplex doorphone with 3 wires connection CIRCUIT (TL084). The content is very simple, very helpful. Components in this ar...

  • Samsung E530 cell phone port

    2016-02-02 06:42:4363

    24 pin Samsung E530 cellphone specialconnector at the mobile phone (keypad up) Pin Signal Description 6,17 GND 10 Tx 21 Rx Source:www.pinouts.ru Reprin...

  • Telephone Ringtone Generator circuit diagram

    2016-02-02 05:59:1365

    This is really a very simple home telephone ring tone generator circuit which is built with applying only several electronic components / parts. It gen...

  • Telephone line vigilance principle

    2016-02-02 05:25:0965

    Next, alert the telephone line principle. The most effective way is to grasp the principle of combining schematic view text, combined with text to unde...

  • Nokia 8210 Mobile Phone Travel Charger Circuit Diagram

    2016-02-02 03:41:0576

    This is a very convenient cell phone charger Nokia 8210 mobile phonetravel charger. Its salient features are: input AC220V/50Hz(30mA),output 4.2V(200mA...

  • Mobile Phone Travel Charger

    2016-02-02 01:02:1682

    Here is an ideal Mobile charger using 1.5 volt pen cells to charge mobile phone while traveling. It can replenish cell phone battery three or four time...

  • Telephone Hold Button

    2016-02-02 00:34:4865

    Although a hold feature is standard on most new phones, a lot of us still use the origional bell phones. Those of us that require a hold feature will f...

  • Philips 630 cell phones

    2016-02-02 00:17:4663

    for data/flash cable only 19 pin Philips 630 cellphone specialconnector at the mobile phone Pin Signal Description 9 Gnd 14 Rx 15 Tx ->R1K5 to 5v Sourc...

  • 4 LINE TELEPHONE LINE STATUS INDICATOR

    2016-02-02 00:11:1877

    Click on Drawing Below to view PDF version of Schematic Many home businesses use multiple phone lines. This circuit gives you a visual indication when ...

  • Wireless microphone circuit

    2016-02-01 23:34:2771

    The figure is Wireless microphone circuit. Reprinted Url Of This Article: http://www.seekic.com/circuit_diagram/Audio_Circuit/Microphone/Wireless_micro...

  • Cellphone Calling Detector Circuit Diagram (1N5819)

    2016-02-01 22:39:1975

    This circuit use to detect a phone call in the cell phone. With 1.5V operating power supply, it using a coil sensor (L1) that can detect the field emit...

  • Wireless Headphone Circuit Diagram

    2016-02-01 20:26:21153

    Wireless Headphone Working principle is introduced.The transmitter comprises a single amplifying stage driving two series connected IR LEDS. The input ...

  • Mobile Phone Radiation

    2016-02-01 19:24:5174

    Mobile phone radiation and health concerns have been raised, especially following the enormous increase in the use of wireless mobile telephony through...

  • Clue engaged telephone line

    2016-02-01 18:16:1462

    Clue engaged telephone line ??? ?????? ????? ????????? ???????? ????? ?? ??? ?????????? ??????, ???????????? ??? ??????? ??? ?? ???? ??? ?????????? ?? ...

  • Pulse dialing system for interfacing telephone circuit

    2016-02-01 17:55:45350

    A pulse dialing system for a VoIP modem includes a subscriber line interface circuit (SLIC) for interfacing analog telephone signals to digital signals...

  • Wireless-fm-microphone

    2016-02-01 17:44:56130

    Transistor Q1 acts as an amplifier for condenser microphone MIC1. The output of Q1 is applied to the base of transistor Q2 through a 4. 7 -I`F capacito...

  • Easy Loudspeaker Circuit For Telephone(BC548 )

    2016-02-01 17:16:5068

    This paper introduces the Easy Loudspeaker Circuit For Telephone (BC548). This principle is easy to understand, but also very practical. Depth understa...

  • Nokia 6260 cell phone internal

    2016-02-01 16:29:3364

    pinout also for Nokia 3230? 8 pin Nokia 6260 cellphone specialconnector at the cellular phone Pin Signal Description 2 Vpp 3 Tx 4 MBUS 5 Rx 6 GND 7 BSI...

  • Nokia 8887 cell phone

    2016-02-01 15:54:5166

    for data/flash cable only 18 pin unspecified cellphone specialconnector at the mobile phone (keypad down) keypad---------------------|18 .................

  • Cardiophone Circuit

    2016-02-01 15:12:3467

    The human heartbeat can be made audible by using this cardiophone circuit. It is basically an audio circuit coupled to a probe made specially for the p...

  • Mobile Phone Call Indicator Circuit Principle

    2016-02-01 14:49:0169

    This Mobile phonecall indicator circuit can be used to escape from the nuisance of mobile phone rings when you are at home. This circuit will give a vi...

  • Mobile Phone Battery Charger(LM7806)

    2016-02-01 14:45:2297

    This article briefly describes the Mobile Phone Battery Charger (LM7806). This principle is easy to understand, but also very practical. Depth understa...

  • The Original 2 Phone Link Design Circuit

    2016-02-01 14:22:4564

    The Original 2 Phone Link Design Circuit This is the circuit that sparked off all the other Link Telephone Intercom designs. Originally designed back i...

  • The old many mobile phone or cell phone circuits

    2016-02-01 12:16:4365

    One of my friend has the repair mobile phone shop in rural areas. He said he lived in a small village, the people has low income. But almost every hous...

  • Nokia 8810, 8830 cell phones internal

    2016-02-01 10:11:4962

    for data/flash cable only 8 pin Nokia 8810 cellphone specialconnector at the mobile phone Pin Number Pin Name Direction Description 1 Gnd 2 Tx 3 Rx 4 M...

  • 48V Phantom Feed Supply for Microphones CIRCUIT (OPA277UAE4)

    2016-02-01 08:48:4685

    This article describes the 48V Phantom Feed Supply for Microphones CIRCUIT (OPA277UAE4). The content is very simple, very helpful. Components in this a...

  • The Incredible Stereo Microphone in an MSI Wind!

    2016-02-01 07:41:4462

    People who love to travel are always having a very serious matter, especially for they that keep the laptop with them, where most of the inbuilt microp...

  • Low Noise Balanced Microphone Preamp (TL071)

    2016-02-01 07:29:08171

    This article describes the Low Noise Balanced Microphone Preamp (TL071). The content is very simple, very helpful. Components in this article can help ...

  • Scramble Encrypted Phone Circuit

    2016-02-01 05:58:27109

    Scramble Encrypted Phone is designed for voice communication protection and is guarded by our unique Frequency Band Scrambling Technology. (FBST) Secur...

  • The Original 2 Phone Link Design

    2016-02-01 05:37:2062

    This is the circuit that sparked off all the other Link Telephone Intercom designs. Originally designed back in 1996 with heavy duty relays and their c...

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