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large fm radio built
additional fm radio parts

Kitronik FM Radio Kit V2.0

Stock code: 2157
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£16.02
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5+£12.75
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£15.30
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£14.52
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200+£11.50 *
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£13.79 *
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* Price shown includes kit bulk buy discount
(2 customer reviews)

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Kitronik FM Radio Kit V2.0 plus batteries
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Kitronik FM Radio Kit V2.0 + Pro-Elec Alkaline AA Battery - Pack of 4
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Kitronik FM Radio Kit V2.0 plus batteries and soldering starter kit
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Kitronik FM Radio Kit V2.0 + Pro-Elec Alkaline AA Battery - Pack of 4 + Soldering Iron Starter Kit
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The FM radio kit uses industrial surface mount ICs (the Si4820 and the NCP2890). The FM radio kit is supplied with the ICs mounted on the board. You just have to solder the remaining resistors, capacitors and other components to finish the kit.

The radio has controls for tuning and adjusting the volume. The circuit includes an audio amplifier and output is via a 66mm diameter speaker that is supplied with the kit.

The board can be powered from a 2.5V to 5.5V supply and works nicely off a 5V wall supply or 3x AA batteries (not supplied).

The Si4820 IC is one of the latest generations of radio receiver ICs that offer fantastic reception quality and ease of tuning, and the NCP2890 IC can output 1W of power.

Features:

  • FM Radio kit.
  • Audio amplifier built-in.

Contents:

Dimensions:

  • PCB Length: 88mm.
  • PCB Width: 46mm.

Video:

 

Requires:

Resources:

Documents & downloads

Technical Information

AttributeValue
PCB Length 88mm.
PCB Width 46mm.
PCB Component Count 36.
Voltage Nominal 5V.
Voltage Range 2.5V - 5.5V.
Voltage Absolute Max 6V.
Typical Standby Current 20mA.
Current Maximum at Nominal Voltage 250mA.

Related resources

Soldering School – Kitronik University

The introductory guide to soldering explains what soldering is, contains lessons on soldering equipment, how to solder and how to look after your tools.

FM Radio Kit – Wisbech Grammar School

Year 9 D&T students from Wisbech Grammar School sent us these great examples of radios based on our FM Radio Kit. Fantastic work class, you should be proud!

2 reviews for Kitronik FM Radio Kit V2.0

  1. geoff –

    it works very well and is a perfect starter kit for children

  2. Geoffrey Eddyshaw –

    This was easy to construct with clear instruction and coupled to larger speaker produce excellent reception. I would certainly recommend the kit.

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Questions and answers

    OK to use with a 15 ohm speaker? I realise the output power will be less.
  1. 0 votes
    Q OK to use with a 15 ohm speaker? I realise the output power will be less.
    Asked by Stephen Aizlewood on June 24, 2019 12:00 am
    Answered by the admin HI Stephen, Thank you for your question, you would get some sound out of the speaker but how loud it would be and how good quality is hard for me to say. You would not however damage the kit or speaker with that level of impedence. Best Regards Cullen
    2. Hi, I'm making this product as a part of my final piece in university (I'm making a radio with housing etc) but the kit isn't working. I've done everything in the diagram except i've used different wire to attach the speakers to the radio and I've used the same cable to attach the volume and tuning knobs to the circuit boards (to allow me to move them around). Even at full volume, i'm hearing very quiet radio static but its almost inaudible and I can't find any stations. Could the additional cables be causing this or is my product faulty?
  2. 0 votes
    Q Hi, I'm making this product as a part of my final piece in university (I'm making a radio with ho...... Read more
    Asked by Luke on May 4, 2018 12:00 am
    Answered by the admin Hi Luke, Thank you for contacting us regarding your kit. It is unlikely that the wires you have used would be causing an issue, however this kit is very sensitive and as such a small error in building can prevent the kit from working correctly. The best option is to send photo of the top and bottom of the circuit board through to support@kitronik.co.uk with a brief description of the issue and we will take a look.
    3. Do you know what FM frequency range it will tune to?
  3. 0 votes
    Q Do you know what FM frequency range it will tune to?
    Asked by Steven Ellis on January 22, 2018 12:00 am
    Answered by the admin Hi Steven, The datasheet for the FM Radio IC indicates that the band width is between 64-109MHz.
    4. Hi on your previous kit there was a resistor to bypass the mute so you can hear all the signals as you tune, is it possible to remove the mute on this kit? and also would a 360 tuning potentiometer work on this kit?
  4. 0 votes
    Q Hi on your previous kit there was a resistor to bypass the mute so you can hear all the signals a...... Read more
    Asked by simon cox on October 24, 2017 12:00 am
    Answered by the admin Hi Simon, On the previous version there was a pin on the IC which allowed for the mute to be bypassed, however on the new IC there isn't a pin which allows for the mute to be bypassed. With regards to the potentiometer if you are referring to a multi turn potentiometer and it if the correct value then yes this should be possible. It should also make tuning easier as it would be less sensitive.
    5. Does the radio kit come with something that will indicate what frequency it is currently on, or not? If it doesn't, could yo point me in the direction of where and how I can make/buy one?
  5. 0 votes
    Q Does the radio kit come with something that will indicate what frequency it is currently on, or n...... Read more
    Asked by Andrew on September 27, 2017 12:00 am
    Answered by the admin Hi Andrew, Unfortunately the IC doesn't allow for a visual display of the frequency to be outputted. As such it is not possible to see the frequency that the radio is tuned to.
    6. I'm looking to make a FM radio as part of my major project and I wanted to know if it was possible in anyway to attach a 3.5mm jack so that you can switch between using this as a radio and as a amplifier? Would you need to attach a second circuit?
  6. 0 votes
    Q I'm looking to make a FM radio as part of my major project and I wanted to know if it was possibl...... Read more
    Asked by Jack on June 13, 2017 12:00 am
    Answered by the admin Hi Jack, In theory it should be possible, you would need to connect the 3.5mm jack lead you to a switch which is then used to change what input you are using. The switch would then need to be connected up between the FM radio IC and the amplifier IC. However we haven't done this ourselves so we are unsure what feedback and interference you would have.
    7. Would I be able to swap out the battery pack for a USB cable to power this circuit/system?
  7. 0 votes
    Q Would I be able to swap out the battery pack for a USB cable to power this circuit/system?
    Asked by Luke on January 6, 2017 12:00 am
    Answered by the admin Hi Luke, The FM radio kits can run on a voltage between 2.5-5.5V with a maximum current draw of 250mA. A USB plug power supply such as this one, 2261-usb-power-supply-uk-mains can provide 5V and a maximum current draw of 500mA. So yes it should be fine.
    8. Would the circuit that is supplied with this kit be able to support output to 2 speakers instead of one?
  8. 0 votes
    Q Would the circuit that is supplied with this kit be able to support output to 2 speakers instead ...... Read more
    Asked by Maisie Kenny on November 17, 2016 12:00 am
    Answered by the admin Hi Maisie, Yes it is possible to add a second speaker to the circuit. The kit is supplied with an 8 Ohm speaker, and is best suited for an impedance of 8 Ohm’s. As such you best option is to either have 2x 16 Ohm speakers and put them in parallel this would give a total impedance of 8 Ohms, or have 2x 4 Ohm speakers in series you would have a total impedance of 8 Ohms.
    9. do you know what the tune 1, tune2 and the band on the chip is for i am not rely familiar with the electronic.
  9. 0 votes
    Q do you know what the tune 1, tune2 and the band on the chip is for i am not rely familiar with th...... Read more
    Asked by Marcus0444 on April 6, 2016 12:00 am
    Answered by the admin Tune 1, Tune 2 and band are used to select the frequency of the radio signals that can be received. There are details on the difference frequency’s that can be received and how to obtain this on page 2 of the following document, http://www.silabs.com/Support%20Documents/TechnicalDocs/AN555.pdf We have set the kit up to receive signals in band 2. 
    10. was is the diagram of this circuit?
  10. 0 votes
    Q was is the diagram of this circuit?
    Asked by circuit on March 3, 2016 12:00 am
    Answered by the admin Are you looking for a circuit diagram? A circuit diagram of the kit can be found in the following link on page 7 2157_fm_radio_essentials_2_2.pdf
    11. I was using the v1.0 kit which is discontinued , that model ran off a 9 volt battery which worked well for the additional curcuit I was using in my project . I'm wondering is there anyway to run or convert the v2.0 radio kit to run off a 9 volt battery ?
  11. 0 votes
    Q I was using the v1.0 kit which is discontinued , that model ran off a 9 volt battery which worke...... Read more
    Asked by Karl Fisher on February 23, 2016 12:00 am
    Answered by the admin Unfortunately the amplifier chip that is used on the new FM radio kit has a maximum voltage rating of 6V, as such you wouldn’t be able to run the new version off a 9V power supply. The only option would be to use a 9V power supply for your other circuit and then use a voltage regulator to step this down to the 5V for the FM radio kit. You would be fine using this regulator, 2906-l7805-5v-reg-ic you would need to connect it up as per the diagram on page 4 7805.pdf
    12. It's it possible to purchase this kit pre assembled?
  12. 0 votes
    Q It's it possible to purchase this kit pre assembled?
    Asked by Karl Fisher on January 18, 2016 12:00 am
    Answered by the admin Unfortunately this kit isn’t available in a pre-built kit form.
    13. Is it possible to add a second speaker to the kit? If so how can it be added?
  13. 0 votes
    Q Is it possible to add a second speaker to the kit? If so how can it be added?
    Asked by Nathan on June 17, 2015 12:00 am
    Answered by the admin It is possible to add a second 8 Ohm speaker in this kit, however the speaker needs to be connect in parallel with the first speaker.
    14. Is the 1m of wire intended for the antenna? Would a standard telescopic antenna be sufficient?
  14. 0 votes
    Q Is the 1m of wire intended for the antenna? Would a standard telescopic antenna be sufficient?
    Asked by Jez Siddons on May 22, 2015 12:00 am
    Answered by the admin The 1m of wire is intended for the antenna and for the speakers, we recommend using a piece of wire with a length of around 56cm. The off cut from this is then used to connect the speaker. As for a telescopic antenna we now stock a compatible antenna for the version 2 FM radio 2006-fm-radio-telescopic-antenna-aerial
    15. Would it be possible to have a 5v wall supply aswell as batteries
  15. 0 votes
    Q Would it be possible to have a 5v wall supply aswell as batteries
    Asked by Oliver Ashton on November 4, 2014 12:00 am
    Answered by the admin You could power it from a 5V wall supply instead of using batteries. You wouldn't want to try to power it from both at the same time though.
    16. I am wondering whether a modified version of this radio would be capable of connecting to a hi-fi applifier that has two tuner rca sockets. Can you please advise on feasibiliy? (i.e. How easy of a task will it be to not use the speaker and instead introduce a 3.5 jack or RCA socket that outputs the sound?)
  16. 0 votes
    Q I am wondering whether a modified version of this radio would be capable of connecting to a hi-fi...... Read more
    Asked by Terry on October 10, 2014 12:00 am
    Answered by the admin There is no reason why you can't do this, though it isn't something we have tried. The audio out of the radio IC is a lot lower than a line signal, so you would need to use the on board amplifier as a pre-amp to get the output to about 1V. Follow the assembly instructions except don't add the speaker. Instead connect the audio connector signal wire to one of the speaker connections, it wants to be the speaker connection pin next to the speaker text. Then connect the ground on the audio connector to the negative power connection on the board. Set the volume fairly low and your ready to give it a try.
    17. Basically, I'd like to build this kit but do so using the high power amp kit. Is this possible?
  17. 0 votes
    Q Basically, I'd like to build this kit but do so using the high power amp kit. Is this possible?
    Asked by Wade on October 2, 2014 12:00 am
    Answered by the admin Hi, it is but it requires a couple of small changes when building the FM Radio kit that are hard to describe without sending pictures. If you email me at support@kitronik.co.uk I can send you some information on how to do it. Basically though all you have to do is common the grounds, disconnect the FM radio's onboard amplifier and reroute the audio signal to the inputs on the high power amp.
    18. I've just been reading the Application note for the Si4820 and see it can also be used as an AM radio plus the Si4824 version can receive short wave. Would it cost much more to use that chip to enable children to receive overseas broadcasts in addition to FM. It would be a fantastic teaching tool for geography and languages.
  18. 0 votes
    Q I've just been reading the Application note for the Si4820 and see it can also be used as an AM r...... Read more
    Asked by David Searle on October 1, 2014 12:00 am
    Answered by the admin It would take a few additional components and a different PCB layout to accommodate them. It's also unlikely to be possible with a single sided PCB using through-hole components. The price would probably end up considerably higher. We wanted to keep our replacement radio kit price as close to the old radio kit as possible so we opted not to include AM or SW features.
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