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BuildCircuit is an online store established in Sydney, Australia.

We design and sell basic electronic kits and Arduino modules.

FM Transmitter DIY learning kit

3 product reviews Write A Review
US $9.14
Calculated at checkout
Current Stock:
Worldwide shipping available- we ship to USA, Canada, New Zealand, UK, EU and Non-EU countries. Shipped From Sydney, Australia

SOLD MORE THAN 5000 pcs WORLDWIDE SINCE 2013. No complain so far. Works in the first attempt . Excellent kit for beginners.  

Here's a simple do-it-yourself (DIY) FM transmitter kit. You can use this simple DIY kit to transmit your voice or audio to your nearest FM radio.

You can use this FM transmitter/microphone in two ways:
a. Audio transmission using electret microphone: You can transmit your voice to FM radio with the electret microphone. You can also place the transmitter circuit close to any loud speaker so that the microphone picks up the sound and transmits to the tuned FM radio.

b. Audio transmission connecting speaker stereo jack to audio source: For hearing better sound, you may connect it to your computer, ipod or mp3 player using a speaker jack. The audio of your music players get transmitted to your nearby radio.

It comes as a pack of parts kit and can be easily assembled if you can follow the silkscreen indicators (labels) and have beginning experience with a soldering iron. You will need to read the resistor bands or use a multimeter to determine the resistor sizes. The kit operates with a 3-9V power supply.



  • Frequency Range: 88-108MHZ (Frequency can be changed by moving the adjustable inductor coil).
  • Operating voltage: 3V-9V.
  • Transmission range: The transmission range depends upon the length of antenna used. We send a simple 20cm long wire that should transmit signal around 10m inside your room. The signal can be transmitted ever far with longer antenna of length around 50cm. It can transmit up to 100m in open space.
Kit package contains:

  1. Electret microphone.
  2. Transistor (Q1)- S9018.
  3. R1- 2.2K
  4. R2- 22K
  5. R3- 2.2K
  6. R4- 33 Ohm
  7. R5- 33 Ohm
  8. C1- 0.1uF(Code- 104). Read here how to interpret capacitor code.
  9. C2- 0.1uF (Code- 104)
  10. C3- 680pF(Code- 681)
  11. C4- 30pF(Code- 30). This capacitor contributes to the FM transmission frequency.
  12. C5- 10pF(Code- 10)
  13. C6- 30pF(Code- 30). Coupling capacitor connected to the antenna of the kit.
  14. C7- 30pF(Code- 30)
  15. C8- 0.1uF(Code- 104)
  16. Inductor(L)- 0.1uH (5.5Turns coil). This contributes to the FM transmission frequency.
  17. Antenna- A short wire, 20cm long.
  18. PCB
  19. 9V battery connector
  20. Stereo speaker jack (Shipped from date: 19.11.2013)

We may send 4 color or 5 color code resistors.


Product Reviews

Some of the reviews have been imported from previous store
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  1. Nice kit for beginners

    Posted by Julia on 26th Sep 2016

    I had purchased 30pcs of this kit for my students. All enjoyed making it. Very good range and easy to make. The tutorials are clear for beginners.

  2. Beat everyone's prices

    Posted by Unknown on 23rd Sep 2016

    You guys really beat everyone's price. The best part of buying with you guys is the prompt communication, price and tutorials. The tutorials are clear and anyone with least knowledge in electronics can make it.

  3. Good transmitter kit

    Posted by Stephen Keen on 6th Sep 2016

    Fast delivery as usual. very good design for beginners. thanks

Information about shipping

BuildCircuit is a trustworthy online store established in Sydney, Australia. We have been maintaining our quick shipping service since we started the store in Turku, Finland(in 2012).

Shipping information for international customers

We ship our products to more than 45 countries using Australia Post. Our regular customers are from the USA, Canada and Europe. We are currently using four different shipping methods to ship the orders to international destinations. We request you to select 'Standard Post' or 'Registered Post' while checking out so that you can receive your package quickly.

We usually ship your orders within 1-2 days. Small orders are usually processed and shipped on the same day.

Shipping information for Australian customers

All the orders from Australia are shipped on the next day at 9.00AM. Orders with Express Australia Post are also shipped on the next day if your order is placed before 1.00PM. We provide tracking code for Standard, Registered and Express Post orders only.

Australia Post has never lost any package since we started our business in Ausralia. So, we request you all to buy with confidence.

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