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About BUILDCIRCUIT

BuildCircuit is an online store for selling electronics kits and components related to Arduino, Raspberry Pi, etc. We ship from Liverpool, NSW, Australia.

We design and sell basic electronic kits and Arduino modules for all electronics enthusiasts.

hello@buildcircuit.com.au

1 transistor FM Transmitter DIY learning kit

5 product reviews Write A Review
US $9.05
SKU:
BC-0012
Shipping:
Calculated at checkout
Current Stock:
87
Quantity:

If the quantity displayed is less than what you need, please contact us as we can get this product within 7-10 working days or we may still have this in our other stores. Please contact us before you leave, we will respond.

This product is shipped from Sydney, Australia. Worldwide shipping available- we ship to USA, Canada, New Zealand, UK, EU and Non-EU countries.

We are now selling only COMPONENTS of this kit. If you need only components and want to build this kit on your own strip board/PCB, you can buy that. CHECK OUT THIS PAGE

SOLD MORE THAN 5000 pcs WORLDWIDE SINCE 2013. No complain so far. Works in the first attempt. Excellent kit for beginners.  Used by several makerspaces and schools/colleges worldwide.

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. 

Features:

  • 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 and 2pcs wires (can be any color)
  20. Stereo speaker jack
We may send 4 color or 5 color code resistors. 

Documents:

Product Reviews

As we are getting few reviews for our products, we are displaying feedback from our store on Ebay. Please leave your feedback if you purchase a product from our store. Click on the image below to see all the recent feedback

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  1. Transmits as described

    Posted by Tim Wiley on 20th Dec 2016

    Indeed a fun project for beginners. I had given up making FM transmitter because of inaccuracy in making the inductor. The best thing about this transmitter is that I didn't have to build the inductor myself. If you could build the other coil inductor the transmission would be much better.

  2. cool fm tx

    Posted by Jamie on 19th Dec 2016

    transmitted audio clearly from my phone

  3. good

    Posted by Henry Venesa on 16th Dec 2016

    got it quickly. i modified the kit to increase the transmission range and it worked. ok for hobbyists

  4. Worked easily

    Posted by Sean Morton on 15th Dec 2016

    It was fun making fm transmitter. the transmission is clean and clear. Took just 30 minutes to make one and worked in first try.

  5. Good transmitter kit

    Posted by Stephen Keen on 6th Sep 2016

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

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