TV signal amplifier 470Mhz-860Mhz circuit

This amplifier can amplify to 10dB the RF signal from antenna working as class A and is based on transistor BFQ34 of Philips. The transistor comes in case SOT122A. You may find the BFQ34T in market but better do not use it as it has different characteristics.Input signal should be about 10mW if we want 10dB output. So with 0.5mW we get 5dB. Do not overdrive the transistor because the signal will be distorted full of lines, without color etc. So use 12Volts with 1A stabilised power supply. The circuit should be enclosed in a small metal box. Electronics Circuit Application

                                  

MC34063 Voltage variable Regulator circuit

 

The circuit is a good battery. It is Control Volttage regulator Output 12V 1.5A , Input Voltage battery 5V-13V Only  Electronics Circuit Application

Simple Phone Tap Circuit.

This circuit is extremely simple, therefore there is less chance of any problems. It can be placed anywhere on the phone line and it will record any conversation on any phone on that line.
   
Part                         Total Qty.              Description

R1                            1                    470 Ohm 1/4 Watt Resistor   
R2                            1                    1K 1/4 Watt Resistor   
R3                            1                     100K 1/4 Watt Resistor   
R4                            1                    6K 1/4 Watt Resistor   
C1, C2                     2                    0.01 uF 100V Ceramic Capacitor   
K1                            1                    24VDC Reed Relay   
MISC                       1                    Wire, Headphone Plugs, Phone Plug Or Alligator Clips   

Electronics Circuit Application

Please note: I have received several emails saying that this circuit will not work and that it may hold your line off hook and to me it looks like it will (it would put quite a load on the phone line). For some, it has worked fine. Build at your own risk.

Colour (Sound) Organ Circuits.

 
                                                 circuit

Nokia N91 Phone white display Solution.

Nokia n91 is s very nice mobile phone but some time its create a different problem with display or LCD.Some time when you mobile on its not show the any display on the lcd or LCD show white.If its show the display blank(no lights and no display) so its mean your mobile phones LCD is damage then you open the mobile phone with mobile phone tools and replace the LCD.If its show the only white  and no display then may be your mobile Phone LCD is OK but display IC is damage.So replace the LCD with new one.If your mobile phone problem not solved then you then you replace the display ic.Display Ic i show you below picture.
These problem is same
Nokia n91 blank display .
 Nokia n91display problem.
 Nokia n91 display jumper.
 Nokia n91 no display.
 Nokia n91 white display.
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Electronics Circuit Application

 

China mobile GSM phone white display solution

Welcome to the mobile phone repairing tips blog.This is my farts  post on blog.my name is Rizwan Naz and i am a mobile repairing expert.My blog is all about the mobile phone;s software and hardware solution.Whenever you will visit my blog you will find the all solution of your any kind of cell phone.Here you can find all the cell phone repairing tips,applications,software,blackberry software information,nokia  mobile phone all models china all models solution.Today china mobile phone is very famous around the world but some time it create a problem white screen.It held after few second and became white display.There tow reason first your mobile phone put down on the floor and second your mobile phone water damage.
china mobile have many models but hardware have same software different.This picture have a one china mobile phone bored and seven IC;s same IC small and three main IC big and big one UUP IC and second REM thread is power IC.

Electronics Circuit Application

If you china mobile phone create a problem white display.
First of all you open a mobile with sample  mobile phone tools and put the mobile phone bored same  this picture and rehot the UUP IC.Then your china mobile phone problem 100% solve.
If you like my blog and you want to know about the cell phone repairing tips.please give me your comments. Electronics Circuit Application

Dark Activated Switch Circuits

 

Dark Activated Switch  Circuits