thanxsis there any replacement for 22nf capacitor. You can also use 20-100pF capacitor also.Very nice and illustrated project. In the schematic, you will see the components required for making an FM transmitter.The transmission range of this circuit is approximately 10-20 meters.You need the following components for this experiment:3.

Please use any ceramic capacitor between 1-100pF. And, I think 0.1H does not work.

Pls and TYCan i use old mobile's small ANTINA and "copper 22 Swg "wire to coil ?for antenna you can simply use a 6 inch long flexible wire, a mobile antenna is not required.for tuning use an FM radio as it would have a better receiving power than a mobile phone.Previous: Making a Regulated 9V Battery Eliminator CircuitAll the FM transmitter circuits presented below are significantly powerful, hard to trace in their hidden positions, and equipped for grasping even the weakest of whispers in the vicinity. I will try to make the circuit again today (just for you) and let you know if there is any problem.sir ..plz how to use trimmer capacitor…..VC1 ….it is having three terminals….by the way i am also connecting right now…is it possible to contact u in another way..bcoz its taking long time ..to contact u sir plz…hi bro I want to know that at how much frequency you got the output?? This gives R5 = (Ve/Ie) = 540 Ohms. A FM transmitter can cover maximum distance, Here showing a Long Range FM Transmitter Circuit diagram that can cover the distance upto 5 km and with the power of 1 w. Here presenting a small powerful circuit of a FM transmitter which operate with 12v dc. can i know what should be modified if i want the transmitter to transmit for about 8000 square feet.

The procedures take place rapidly generating a frequency across the coil which is transmitted as carrier waves through the connected antenna.In the course if the coil is subjected to an external vibrational pulse, it’s forced to mount the above explained carrier waves in the air and could be received and retrieved over a The circuit may be expected to work at around 90MHz frequency band.The second example below shows another single transistor FM spy circuit that incorporates a tuned circuit or a frequency determining stage in it.In the original prototype the coil was created by etching a spiral track layout on the PCB itself, however for optimal gain and performance such etched antenna coil must be avoided and the traditional wire wound type of coil must be employed.Below's another circuit you would like to know about. please tell me fast as I am in middle of my projectsir …i tried on my bread board..i made changes as u said sir..it worked..but only i can hear popping sound…in ur previous reply u said that antenna height is 10metres…!. You can simply follow the steps shown below.On the image shown below, you can notice that I have not used a trimmer/variable capacitor. This amplified signal is then given to the oscillator circuit through the coupling capacitor. I think you are doing some mistakesir how can finde the value of inductor and capacitor? Does anyone have an idea of why it is doing this?I saw your circuit diagram, Your explanation is very nice, Thanks you very much. It should be 10-15cm long.i want to make a project whih transfer electriity using wirless antenna…not using coil…..is this possible…it is possible.cos i’ve seen it before on some invention site. Switch on receiver (any fm radio). A soon as this happens the transistor switches ON via the 47k resistor forcing the pulse through the inductor which feeds back a negative pulse to the base of the transistor discharging the 22n capacitor.This switches OFF the transistor until 22n yet again charges fully. In your case, it should be around 10cm only.Remember that this kind of radio projects don’t work in the first attempt, you have to make several hit and trails, best of luck.ok..thanks for troubleshooting tips….any way i am using readily available inductor…i have doubt about antenna..to use whether 15cm or 10metres..i am in middle of my mini project..I am sorry, my mistake, it is 10cm. Please help me…i dont find 2n3904 what another transister should i use in this placesir,what receiver can i use?

The oscillator circuit generates a signal with a frequency determined by the value of the variable capacitor. And on that page, you can see the formula of frequency. thanksconnect a frequency meter at the output for reading the frequencyAt the receiver end buzz sound comes means sound is not clear when I use it with 9v adapter.

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