Position: Index > Phone Circuit >
  • 3 FM Wireless Microphone Kit

    2016-02-16 05:05:1868

    Enhanced wireless microphone, FM work, the sound quality is good, you can listen to normal radio. Microphone sound signals into electrical signals, via...

  • Wireless Microphone FM Transmitter

    2016-02-16 04:41:1876

    Wireless Microphone FM Transmitter This Wireless Microphone FM Transmitter has been a very popular project with beginners and experienced constructors ...

  • Ring detect circuit for automatic phone answering

    2016-02-16 04:08:5084

    This circuit is used with a binary synchronous communications adapter that is used in connection with a particular type of data set (Swedish GE2002A, S...

  • Wireless Ir Headphone Transmitter Circuit

    2016-02-16 03:57:2494

    The transmitter for the wireless headphones is built around a CD4046 CMOS phase-locked loop, coupled with a driver transistor, and a pair of infrared L...

  • Telephone Ringer Using Timer ICs(NE556)

    2016-02-16 03:01:1578

    This article briefly describes the Telephone Ringer Using Timer ICs (NE556). This principle is easy to understand, but also very practical. Depth under...

  • FM radio Wireless Microphones Circuit

    2016-02-16 02:17:5267

    wireless microphones circuit DESCRIPTIONThis circuit contains information about the structure of a small radio transmitter that has a PCB 1.75 x 2.5 (4...

  • Cellular Phone Calling Detector electronic circuit diagram

    2016-02-16 01:53:3664

    Parts: R1____________100K 1/4W Resistor R2______________3K9 1/4W Resistor R3______________1M 1/4W Resistor C1,C2_________100nF 63V Polyester Capacitors...

  • Soft Musical Telephone Ringer electronic circuit diagram

    2016-02-16 01:47:2262

    The normal telephone bell, at times (specially during night when one does not want to be disturbed), appears to be quite irritating. The circuit shown ...

  • Samsung SCH-A530, SPH-A620 cell phones

    2016-02-16 01:24:0264

    for data/flash cable only 18 pin Samsung cellphone specialconnector at the mobile phone (keypad up) Pin Signal Description 5, 18 short 13 Rx 14 Tx 8,11...

  • PA System Phone Pager Circuit

    2016-02-16 00:47:0178

    An apparatus for interfacing a telephone system having a central processor and a plurality of telephone extension lines operatively connected to the ce...

  • Nokia 8260 cell phone internal

    2016-02-15 22:02:0265

    for data/flash cable only 8 pin Nokia 8260 cellphone specialconnector at the mobile phone Pin Number Pin Name Direction Description 4 Gnd 3 Tx 2 Rx 1 M...

  • Parallel Telephone principle explanation of confidentiality

    2016-02-15 21:58:1365

    This article is the principle of confidentiality in parallel telephone commentary. By convention, in order to better grasp the principles you are, we r...

  • Single Transistor Wireless Microphone (FM Transmitter)

    2016-02-15 19:59:21103

    This wireless microphone circuit uses only a single transistor, with few additional passive components. This FM transmitter is very compact and need on...

  • Nokia 6800, 6810 cell phones internal

    2016-02-15 18:58:4663

    for data/flash cable only 10 pin Nokia 6800 cellphone specialconnector at the mobile phone Pin Number Pin Name Direction Description 2 Rx 3 Tx 8 MBUS 9...

  • Doorphone Intercom

    2016-02-15 18:54:5869

    Notes: For the first time, this circuit was designed by two authors, Mr Laurier Gendron of Burnaby in British Columbia, Canada, and Andy Collinson. Ple...

  • Phillips Fizz/Spark cell phones

    2016-02-15 18:40:2966

    full pinout 14 pin Philips cellphone specialconnector at the mobile phone Pin Description 1 GROUND 2 GROUND 3 HANDS FREE ON/OFF 4 MUTE 5 TX 6 RX 7 RTS ...

  • Telephone Lamp Circuit

    2016-02-15 16:56:0164

    Here is a White LED Lamp that turns on when the telephone rings. The cool white light helps to locate the phone in darkness and also helps to note the ...

  • Contactless telephone ringer circuit

    2016-02-15 14:49:4566

    Description. The contact less telephone ringer circuit can produce a ring as well as a visual indication when a call comes.The main advantage is that s...

  • Hearing impaired visual ring indication telephone

    2016-02-15 14:46:5467

    Visual ring indication of a telephone is important for the hearing impaired, for use in noisy locations (or where ear protection is used), for fast or ...

  • Nokia 2110 cell phone

    2016-02-15 14:21:2766

    full pinout 16 pin cellphone 2 rows w/antenna right specialconnector at the mobile phone ----------------------------------------- | 16 15 14 13 12 11 ...

  • Sharp V802, V902 cell phones

    2016-02-15 14:16:5361

    full pinout 16 pin cellphone specialconnector at the mobile phone (keypad up) Pin USB Signal UART signal Hands-free signal 1 GND 2 USB D RxD RxD 3 USB ...

  • Phone Broadcaster Circuit Diagram (BC548)

    2016-02-15 11:30:0767

    This article describes the Phone Broadcaster Circuit Diagram (BC548). The content is very simple, very helpful. Components in this article can help you...

  • Nokia 3600, 3650, 3660 cell phone internal

    2016-02-15 10:51:5564

    full pinout 5 pin Nokia 3650 cellphone specialconnector Pin Number Pin Name 1 GND 2 MBUS 3 Vpp 4 Rx 5 Tx A Gnd B BSI C Vbatt Source:www.pinouts.ru Repr...

  • Phone

    2016-02-15 10:47:0370

    Circuit diagram This circuit will allow you to place a phone call on hold and if you wish to have them listen to music while they are on hold. The circ...

  • Sendo S200 cell phones

    2016-02-15 09:47:1063

    for data/flash cable only 6 pin SENDO cellphone specialconnector at the cellular phone Pin Signal Description 1 Gnd 2 5v 3 Rx 4 Tx Source:www.pinouts.r...

  • Low Noise Balanced Microphone Preamp (2N4403)

    2016-02-15 08:36:1073

    This article describes the Low Noise Balanced Microphone Preamp (2N4403). The content is very simple, very helpful. Components in this article can help...

  • Two Identical Telephone Intercom Circuit

    2016-02-15 06:57:5564

    Two telephones can be used as an intercom by using this circuit. Older style rotary phones that are nonelectronic might work best in this application.T...

  • Nokia 16xx, 3110, 8110 cell phones

    2016-02-15 06:07:1064

    full pinout 12 pin Nokia 8110 cellphone specialconnector at the cellular phone Pin Name Description 1 GND Charger/System Ground 2 V_OUT Accessory Outpu...

  • How to build Cellular Phone Calling Detector Circuit Schemat

    2016-02-15 05:47:2870

    Description This circuit was designed to detect when a call is incoming in a cellular phone (even when the calling tone of the device is switched-off) ...

  • How to build Protection For Telephone Line

    2016-02-15 05:47:2364

    Circuit diagram: Description A long time ago when telephones were so simple almost nothing could go amiss from an electrical point of view, Telecom ope...

Maybe you like