Make a 1.5v Single-Transistor FM Transmitter
Intro: 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
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
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!
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!
20 Comments
ggarcía-2 7 years ago
And how many turns are needed?
ggarcía-2 7 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.
Adarsh_tronix 10 years ago
How can I change the frequency of the emitter?I guess it depends on one of those capacitors..but which one?
cheezyguy5 10 years ago
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.
Adarsh_tronix 9 years ago
Thank you very much!
KolesB 9 years ago
how conect mp3 player its not work
anuragtheviper 9 years ago
try replacing the Audio In wire with a MONO 3.5mm Jack
khalidco2010 10 years ago
May Allah reward you well
cool thanxxxxxx
dmarcelo2 10 years ago
imaduddin 10 years ago
avashisht1 10 years ago
lseemann 10 years ago
vicenzio20 11 years ago
parmar_cd 11 years ago
rajaniket00 11 years ago
jumper1111 11 years ago
~CableGuy 11 years ago
Cekpi7 11 years ago
~CableGuy 11 years ago
I Had salvaged the components before from an old cordless phone.
Computothought 11 years ago