Step 1
first, I need an NPN transistor.
you can use any NPN transistor as you wish.
I used to hear bc 547.
this transmitter’s cool part is a coil. if the making this coil with wrong way.
You can never create this FM transmitter
I took 24 wags coper to wear.. and Wrapped it five times
The coil has been created. But it was created incorrectly
The correct rule is to be
This coil will have the same straight line with both legs
this coil's wide is 5mm and height is 4mm
I've been using 22 pico fared capacitors to Keep it
coil's frequency.
I'm using here a 4.7k resistor from positive to the transistor’s best pin
The reason to activate this transistor
I've used here an o.o1uf capacitor, with base and ground.
the reason to filter this transistor’s bess volt.
The negative voltage of the transistor's emitter pin can be done through a 100-ohm resistor
For a little bit of volt.
Also, add the 0.01 nano farad capacitor to the emitter and collector pin
the reason is To destroy more noise and more feedback.
At the end of all, I used a 0.01 UF capacitor to filter 1.5 DC volt.
My transmitter has been created. Again I will continue this
I've added positive and negative wires to the transmitter circuit.
I've used AAA batteries here
This is the perfect battery for this circuit
Entering more than one volt will destroy the transistor.
the reason that a negative voltage is inserted into the emitter pin, and the positive volt enters the calculator pin.
Step 2
I'm adding a spiker to F.M Radio
Insert the 12 volts of F.M's positive and negative wire
And F.M. is going on.
My F.M transmitter is now active
And pressed the scene switch. And you can see the scene is still there.
I hope I'll get my F.M. transmitter signal here.
The signal is also 92.9 MHz.
I want to play some music in it
If you want to play songs, then you have to make some changes to the circuit
If you want to run a condenser microphone in it, you need to add a 1mfd condenser to the base pin of the transistor.
The condenser's other pins have to be connected to 10k resistors throue positive
If you want to play music from an mp3 player then the 82k resistor will be added to the output condenser.
And I put a small antenna in it
This is my old headphone I added this to the transmitter
I added a 0.5 cable to my laptop
And I played some music
This process may change mhz. the reason There is no hostel in it.
Now the frequency is also 90.6 MHz
Now the question is how far will it work?
To test it, keep walking around with the phone
And I saw the small transmitter's antenna working at 100 matter
If you add a large antenna to the transmitter, then this transmitter will work even longer
This comment has been removed by the author.
ReplyDeletekeep a track of spellings its horrible
ReplyDeletebut the explanation was good
link ???????
ReplyDeleteWhere is the diagram???
ReplyDeleteIs it 12 volt or 1.5 volt? Because this says "And insert the 12 volts of F.M's positive"
ReplyDelete1.5 VOLT
DeleteI need clear circuit diagram ?
ReplyDeletehey send me clear diagram
ReplyDeleteI need clear circuit diagram ?
ReplyDeleteHi send to me circuit diagram
ReplyDeleteDiagram please
ReplyDeleteHi! Where is diagram? We need to make this cirtuit please! I m from Argentina.
ReplyDelete
ReplyDeletesend diageram
Pls, send clear circuit diagram.
ReplyDeleteIt's good,but It's will be helpful if you give us the clear circuit diagram.
ReplyDeletePls,send clear circuit diagram
ReplyDeletePls,send clear circuit diagram
ReplyDeletePlease send circuit
ReplyDeleteSir, please send me clear diagram.
ReplyDeleteI really wanna make.
I'm from Nepal🇳🇵🇳🇵
Very poor quality explanation and presentation
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteExcellent work.
ReplyDeleteGood explanations, I made it. For circuit diagram, a tank circuit ie. Inductor&a v.capacitor is soldered at the collector, that's the that's the first pin when a bc 547 is held facing the data sheet and pins points down. Any capacitor of 5-10pf will work when soldered at collector and emitter, ie feedback capacitor. A 4.7 resistor is soldered at the base(middle pin) to positive rail and a 100ohm resistor at the emitter(last pin) to ground. Electret mic's positive should touch the positive rail and it's negative to the base. Without forgetting a 10 pf between the antenna and the output. And a 104pf cap between the base and ground.
ReplyDeleteGood explanations, I made it. For circuit diagram, a tank circuit ie. Inductor&a v.capacitor is soldered at the collector, that's the that's the first pin when a bc 547 is held facing the data sheet and pins points down. Any capacitor of 5-10pf will work when soldered at collector and emitter, ie feedback capacitor. A 4.7 resistor is soldered at the base(middle pin) to positive rail and a 100ohm resistor at the emitter(last pin) to ground. Electret mic's positive should touch the positive rail and it's negative to the base. Without forgetting a 10 pf between the antenna and the output. And a 104pf cap between the base and ground.
ReplyDeleteGood explanations, I made it. For circuit diagram, a tank circuit ie. Inductor&a v.capacitor is soldered at the collector, that's the that's the first pin when a bc 547 is held facing the data sheet and pins points down. Any capacitor of 5-10pf will work when soldered at collector and emitter, ie feedback capacitor. A 4.7 resistor is soldered at the base(middle pin) to positive rail and a 100ohm resistor at the emitter(last pin) to ground. Electret mic's positive should touch the positive rail and it's negative to the base. Without forgetting a 10 pf between the antenna and the output. And a 104pf cap between the base and ground.
ReplyDeleteUr contact number plz
ReplyDelete