Introduction: Make a 1.5v Single-Transistor FM Transmitter
Hello!
I'm gonna show you How to make a Simple FM Transmitter that works with only an AA battery.
Components:
47 pF Ceramic Capacitor x1
33 pF Ceramic Capacitor x1
10 pF Ceramic Capacitor x1
22 uF Electrolytic Capacitor x1
2SC655 (or BC548) Transistor x1
Single Battery Holder (AA Size)
small Breadboard/PCB
10cm Magnet wire x2
Audio Signal Source (e.g. a MP3 Player)
Tools:
Soldering Iron
Solder
Step 1: The Circuit and Parts
Here is the Circuit we're going to make.
Step 2: Start Soldering Parts on PCB
It takes about 10-12 mins to do this.
Step 3: Make the Coils
Wrap the first Magnet Wire around a thick pen or a size AAA battery.
Do the same for the second Magnet Wire, too.
...Then Solder them on PCB
Step 4: Final Steps
Solder the battery holder wires, Antenna Wire, and the Audio Source.
Step 5: Turn on Your Radio
Turn on a radio and set it at 89MHz FM
Connect the "Audio In" of the Transmitter to your MP3 Player (or any other non-amplified things playing music).
Place the Battery in the holder.
Enjoy!
2 People Made This Project!
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20 Comments
5 years ago
And how many turns are needed?
5 years ago
hi cable Guy!!.
What wire gauge are you using?, I went to the electronics shop and I found that I several gauges :D
I bought on that its not thinner but not so fat.
8 years ago on Introduction
How can I change the frequency of the emitter?I guess it depends on one of those capacitors..but which one?
Reply 8 years ago on Introduction
It is NOT the capacitors (however, the Farads matter) the frequency is changed based upon the oscillation of the inductors (the coils of wire) if you want to change the frequency, search the internet for a calculator that to find how many turns of wire you'll need for a specific frequency.
Reply 7 years ago on Introduction
Thank you very much!
7 years ago on Introduction
how conect mp3 player its not work
Reply 7 years ago on Introduction
try replacing the Audio In wire with a MONO 3.5mm Jack
8 years ago on Introduction
May Allah reward you well
cool thanxxxxxx
8 years ago on Introduction
qual e o concumo??
8 years ago on Introduction
how the magnetic wire diameter?
9 years ago on Introduction
how is the sound quality???
9 years ago on Introduction
nice gag, is it a stereo transmitter or only mono?
9 years ago on Introduction
but the receiver as lai made?
9 years ago on Introduction
There is a problem in this circuit, every time frequency is change when you move the circuit. Can i put variable/trimmer capacitor in this circuit. If yes where to put the variable capacitor and which type of capacitor. Thanks
9 years ago on Introduction
how to increase the range of transmitter.
9 years ago on Introduction
What's the range of this transmitter
Reply 9 years ago on Introduction
About 10 meters max!!!
9 years ago on Introduction
Where did you get pcb
Reply 9 years ago on Introduction
My uncle is owner of an electronic components selling website. I gave him the circuit and asked for a PCB.
I Had salvaged the components before from an old cordless phone.
9 years ago on Introduction
Would a nte199 work for the transistor?