Make a 1.5v Single-Transistor FM Transmitter

by ~CableGuy in Circuits > Wireless

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Make a 1.5v Single-Transistor FM Transmitter

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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

The Circuit and Parts

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Here is the Circuit we're going to make.

Start Soldering Parts on PCB

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It takes about 10-12 mins to do this.

Make the Coils

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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

Final Steps

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Solder the battery holder wires, Antenna Wire, and the Audio Source.

Turn on Your Radio

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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!