Position: Index > Phone Circuit >
  • Telephone Ringer(S202T02)

    2016-02-14 01:43:28155

    This article briefly describes the Telephone Ringer (S202T02). This principle is easy to understand, but also very practical. Depth understanding of ci...

  • Nokia 6650 cell phone internal

    2016-02-14 00:08:3766

    for data/flash cable only 9 pin Nokia 6650 cellphone specialconnector at the mobile phone Pin Number Pin Name Direction Description 3 Rx 4 Tx 7 Gnd 8 M...

  • Phone Broadcast circuit

    2016-02-13 23:01:1765

    This article describes a telephone broadcast circuits. The circuit is simple, inexpensive, and effective. As long as Duokanjibian The schematic can mas...

  • Phone In Use Indicator(2N2222)

    2016-02-13 22:41:0067

    This article briefly describes the Phone In Use Indicator (2N2222). This principle is easy to understand, but also very practical. Depth understanding ...

  • Mobile Phone Ipod Battery Charger Circuit

    2016-02-13 21:33:4363

    This new batterycharger can be used virtually anywhere,The battery charger is nothing more than a 5V supply that has a USB outlet.actual charging circu...

  • Sony CMD J5, J6, J7, J70 cell phones

    2016-02-13 21:17:3670

    for data/flash cable only 12 pin cellphone specialconnector at the mobile phone Mobile phone interface pin Description 4 CTS 5 RTS 7 Tx 8 Rx 12 GND Pin...

  • Phone Incoming Call Flasher

    2016-02-13 20:58:4768

    This is a circuit of phone message flasher, an alternative way to get alarmed when there is an incoming call. When the phone rings, high line voltage w...

  • Speaker Microphone Circuit

    2016-02-13 19:35:1067

    Description: This circuit takes an ordinary loudspeaker and allows it to be used in reverse, as a microphone. Circuit diagram Notes: This circuits allo...

  • Wireless headphones transmitter circuit schematic

    2016-02-13 19:28:1564

    This wireless headphones transmitter assures a quality reception over 2 meters. The oscillator frequency is between 1750KHz and 3500KHz and for antenna...

  • Mobile Cellphone Battery Charger Circuit Using 555

    2016-02-13 18:34:3670

    This diagram is a series of circuits Mobile Cellphone Battery Charger. Stops charging when battery is full charged, Portable unit Charging of the mobil...

  • Wireless infrared headphone transmitter

    2016-02-13 17:28:2762

    This article describes a wireless infrared headphone transmitter. The principle is simple there, we recommend that combine text carefully read the comp...

  • Telephone In Use Indicator Circuit

    2016-02-13 16:58:0763

    Telephone In Use Indicator Circuit With this circuit mounted in or near every phone in the house, it will allow users to know if the phone is being use...

  • Phone Line Polarity Checker(RJ25)

    2016-02-13 14:51:2969

    This article describes the Phone Line Polarity Checker (RJ25). The principle is very simple, very practical. The circuit components can help you unders...

  • CD4520 vowel allophone generator circuit

    2016-02-13 13:23:35103

    The vowel allophone generator coacts with the context index to select the proper vowel allophone, as determined by the phonemes preceding and following...

  • Speaker Microphone Circuit (BC109C)

    2016-02-13 12:26:2575

    This article describes the Speaker Microphone Circuit (BC109C). The content is very simple, very helpful. Components in this article can help you under...

  • Multi Purpose Telephone Circuit Diagram (BC108)

    2016-02-13 12:16:4070

    This article describes the Multi Purpose Telephone Circuit Diagram (BC108). The content is very simple, very helpful. Components in this article can he...

  • FM Telephone Bug(2SA933)

    2016-02-13 11:10:0972

    This article describes FM Telephone Bug (2SA933). The principle is very simple, very practical. The circuit components can help you understand better g...

  • Electret Microphone Pre-amp based NE5532

    2016-02-13 10:46:53148

    The mic preamplifier described here is designed to connect a small electret microphone. The Electret microphone pre amp scheme is very simple and based...

  • Loud ringer for phone using KA2411

    2016-02-13 10:42:4876

    This phone is loud ringing tone circuit for generating the electricity bell in the old telephone. This circuit is relatively loud. so can use to replac...

  • Soft Musical Telephone Ringer Circuit

    2016-02-13 10:36:4065

    Soft Musical Telephone Ringer Circuit Circuit diagram The normal telephone bell, at times (specially during night when one does not want to be disturbe...

  • Sagem My-C2 cell phones

    2016-02-13 09:26:1962

    for data/flash cable only 18 pin unspecified cellphone specialconnector at the mobile phone Pin Signal Description 5 Rx 6 GND 8 Tx Source:www.pinouts.r...

  • Underwater microphone (T8A820M)

    2016-02-13 09:07:0191

    This article describes the Underwater microphone (T8A820M). The principle is very simple, very practical. The circuit components can help you understan...

  • Doorbell Phone ? The Beautiful Combination of Past and Prese

    2016-02-13 08:46:1869

    Have you ever thought of combine the past and present together? It might be seem impossible to do it, but honestly, it was not as difficult as you thin...

  • TPA6110A2, Optimized Depop Circuitry for Stereo Headphone Au

    2016-02-13 08:27:3079

    The TPA6110A2is an ideal optionfor stereo headphone applicationsin portable equipment, such as MP3 players, wireless phones, Internet appliances, voice...

  • Telephone call Voice Changer (TDA7052)

    2016-02-13 08:03:4589

    Voice manipulation device specially intended for props Circuit diagram: Parts: P1______________10K Log. PotentiometerR1,R10__________10K 1/4W Resistors...

  • FM Transmitter Single Transistor Wireless Microphone Circuit

    2016-02-13 04:18:10100

    This article describes the FM Transmitter Single Transistor Wireless Microphone Circuit Schematic (74HC573D). The content is very simple, very helpful....

  • How to build Phone

    2016-02-13 04:07:0870

    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...

  • Solar cell phone charger

    2016-02-13 03:47:0495

    This Solar cell phone charger can charge many models of cellular phones and other portable devices. The schematic diagram come from circuit: Mobile Pho...

  • Sony CMD CD5, Z5, Z18 cell phones

    2016-02-13 03:01:4365

    for data/flash/unlock cable only 18 pin Sony cellphone specialconnector at the cellular phone Mobile phone interface pin Description 5 Tx 12,18 GND 14 ...

  • Classroom Microphone Circuit

    2016-02-13 02:18:3866

    This Audio Amplifier circuit is useful in classrooms to reduce the strain of lecturing ,if the surrounding environment is noisy. It uses the power ampl...

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