Single chip FM transmitter circuit

admin February 24, 2011 19 Comments

Single chip FM transmitter

Description

Here’s a single chip FM transmitter circuit using Maxim semiconductors IC MAX2606. The MAX2606 is a compact, high-performance intermediate frequency VCO specially designed for wireless communication circuits. They have monolithic construction with low-noise and a low-power operation in a compact 6-pin SOT23 packing .Th1s low-noise IC feature an on-chip varicap diode and feedback capacitances that avoid the need for external tuning components, making the MAX2606 perfect for portable systems. Only an external inductor is needed to set the oscillation frequency.In addition to this, an
integrated differential output buffer is also there for driving a mixer or prescaler.The MAX2606 can be operated from a single +2.8 V to +5.4V supply and consumes very less current .The chip can be operated from 45MHz to 650MHz .

In the circuit the nominal frequency is set to 100 Mhz by inductor L1, (390nH) . The left and right channel audio signals from your source are added by R3 and R4, and attenuated by the POT R2. R2 can be used as a volume control .POT R1 can be used to select a channel of transmission between 88Mhz and 108Mhz.Use 80 cm long wire as the antenna .

FM Transmitter Circuit Diagram with Parts List.

Single Chip FM Transmitter

Single Chip FM Transmitter Circuit Diagram

 

Notes

  • Assemble the circuit on a good quality PCB or common board.
  • Use a battery for powering the circuit.It will reduce noise.
  • An FM antenna from a old radio is a better option than the wire antenna.

Our website contains more Radio Transmitter Circuits that you may like to read;

1. Stereo FM Transmitter

2. 200 Meter FM Transmitter

3. 2 Km FM Transmitter

4. FM Transmitter using UPC1651

5. Medium Power FM Transmitter

 

Comments
  • Al-reyashi
    June 3, 2014

    What is the range of transmission distance?

    • Seetharaman
      June 4, 2014

      The maximum dissipation is around 500mw. say you can achieve around 0.5 to 1KM max. @ 100MHz.

  • bob III
    March 31, 2014

    where can I buy the MAX2606?

  • mallikarjun
    July 30, 2013

    Dear sir,

    In this circuit used all components smd are through hole pls replay.

    Thhank you

  • mallikarjun
    July 30, 2013

    Dear sir,

    In this circuit used all components smd are through hole pls replay.

    Thhank you

  • Crazy Guy
    November 27, 2012

    Please explain how to make signals from me to the moon. I need a 400 GHz transmitter for control of lunar rover. PLEASE HELP! THE DEPARTMENT IS TO KILL ME!

    • June 5, 2015

      OK pagle .You can use a sun direction to send the signals to the moon.Hope you are almost got your ans,,,,

  • RAFEEQ
    June 26, 2012

    i want making a 60mhz to 80mhz fm receiver.please help me the subject of making inductor for this project.How can make the inductor these freequency.

    • June 5, 2015

      Helo Rafeeq.Here’s a single chip FM transmitter circuit using Maxim semiconductors IC MAX2606. The MAX2606 is a compact, high-performance intermediate frequency VCO specially designed for wireless communication circuits. They have monolithic construction with low-noise and a low-power operation in a compact 6-pin SOT23 packing .Th1s low-noise IC feature an on-chip varicap diode and feedback capacitances that avoid the need for external tuning components, making the MAX2606 perfect for portable systems. Only an external inductor is needed to set the oscillation frequency.In addition to this, an

  • May 10, 2012

    Please I have seen alot of your circuit diagrams,send for me a simple one which can cover 1km.thanks

  • Seetharaman
    May 14, 2011

    Hi SAWKAT nH means nano Henri,
    1H / 1000 is mH 1H / 1000000 is uH. 1H / 1000000000 is nH. 1H / 1000000000000 is 1pH

  • May 13, 2011

    nH means?

  • May 13, 2011

    I want the Department to send and receive wireless within 3 kelometer of the images and video, or pictures only, and are sent from the USB stick or mobile reception is on your computer or mobile, and be simple and inexpensive
    Please help me ….

    Read more: http://www.circuitstoday.com/single-chip-fm-transmitter-circuit#ixzz1MEIlL6Zy
    Under Creative Commons License: Attribution

  • Gad
    April 27, 2011

    I want the Department to send and receive wireless within 3 kelometer of the images and video, or pictures only, and are sent from the USB stick or mobile reception is on your computer or mobile, and be simple and inexpensive
    Please help me ….

  • May 15, 2010

    I want to construct an FM transmitter using SINGLE CHIP FM transistor between 170mhz to 220mhz

    Why I calculate the value of L1
    please help me??

  • March 29, 2009

    sir
    can u send me componants, with chargable
    dbhattji.

  • Pedro Rito
    March 15, 2009

    Why you determinate the value of L1?

    I want to construct a FM transmitter with nominal frequency between 174 mhz and 216 mhz.

    Can you help me to calculate L1?
    reply to my e-mail.

    Thank you

  • arunkumar
    December 8, 2008

    Please mention the voltage for the condensor in the single chip(MAX2606) fm transmitter

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