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FM Radio Kit, no longer stocked

8.6
Exclusive to Kitronik
Teaching Notes
Key Stage 4
DISCONTINUED - The radio has controls for tuning and to adjust the volume. The circuit includes an audio amplifier and output is via a 66mm diameter speaker.

Availability: Out Of Stock.

Code1+ 5+ 50+
2135£8.60
(£10.32 incl VAT)
£7.75
(£9.30 incl VAT)
£7.20
(£8.64 incl VAT)

Please note: this product has been discontinued and is present for reference only. It is not possible to buy this product.

Please note - This product is only available while stocks last, it has now been replaced by the 2157 Radio Kit V2.

The FM radio kit uses an industrial surface mount IC (the TDA7010T). The FM radio kit is supplied with the IC mounted on the board. The students have to add the remaining resistors, capacitors and amplifier IC to finish the kit.

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

This FM radio kit includes:

  • 1 x FM radio PCB with TDA7010T FM radio IC, varicap diode and inductor pre-mounted
  • 1 x TBA820M audio amplifier IC
  • 1 x 8 pin IC holder
  • 1 x TS9011PCT voltage regulator
  • 1 x 10K linear rotary potentiometer
  • 1 x 100K linear rotary potentiometer
  • 1 x 39pF capacitor, ceramic disc
  • 3 x 180pF capacitors, ceramic disc
  • 1 x 220pF capacitor, ceramic disc
  • 1 x 330pF capacitor, ceramic disc
  • 1 x 2.2nF capacitor, ceramic disc
  • 4 x 10nF capacitors, ceramic disc
  • 4 x 100nF capacitors, ceramic disc
  • 1 x 220nF capacitor, ceramic disc
  • 2 x 3.3nF capacitors, ceramic disc
  • 1 x 470pF capacitor, ceramic disc
  • 2 x 470uF capacitors, electrolytic
  • 1 x 220uF capacitor, electrolytic
  • 1 x 100uF capacitor, electrolytic
  • 1 x 1ohm resistor
  • 1 x 100ohm resistor
  • 2 x 10Kohm resistors
  • 2 x 100Kohm resistors
  • 1 x 4.7Kohm resistor
  • 1 x 15Kohm resistor
  • 1 x aerial wire
  • 1 x PP3 clip lead
  • 1 x speaker (8ohm, 66mm) and connecting wire

The board can be powered from a 4V to 12V battery supply and works nicely off a 9V battery (available separately).

Please note this product should only be used with a battery supply and should not be used with a mains DC power supply.

Click here to download the essential information pdf_icon.gif

Click here to download the full teaching resources pdf_icon.gif

This product is also available in retail packaging making them an ideal gift. Click here to view the retail version

Free samples:

Teachers can order a sample of this kit (one per school) here. You will need to select the kit from a list of all the sample kits; the stock code for this kit is 2135.
Note: this service is only offered to schools for evaluation purposes only.

Buy British:

 This kit is designed and manufactured in the UK by Kitronik.

Please note: this product has been discontinued and is present for reference only. It is not possible to buy this product.

Physical characteristics:

  • PCB Length: 88mm.
  • PCb Width: 46mm.
  • PCB Component Count: 39.

Electrical characteristics:

  • Voltage Nominal: 9V.
  • voltage Range: 3.3V - 15V.
  • Standby Current: 13.6mA.
  • Current Max at Nominal Voltage: 160mA.
F1 radio thumb
Gallery F1 Race Car Radio – Whitchurch High School in Cardiff
F1 Race Car FM Radio by Michael Benbow, year 12 student, at Whitchurch High School, Cardiff.
fm_radio_hawkley_high_school_01
Gallery FM Radios – Hawkley Hall High School
FM Radios designed by a year 11 Resistant Materials group at Hawkley Hall High School.

Questions:

Page:
  1. 1
  2. 2
Posted by Trevor, Thursday, 5 November 2015 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A:

    Measured from the middle of each spindle the distance is 28mm. Please be aware that this product has now be replaced with an improved version of this kit, the code is 2157.

    Posted by Michael Lockhart on Thursday, 5 November 2015
Posted by john, Monday, 20 April 2015 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A:

    Hi John, The radio kit is one of the few kits we sell that is very hard to fault-find with. If any connection is bad or if any component is the wrong value or in the wrong place the result is “doesn’t tune”. It could be a poor connection but there’s no way to narrow down where it is really. You could try reheating all the solder joins. Maybe double check the values on all the little ceramic caps. A 100nF in place of a 10nF could cause problems. Are you running from a battery? If not you should try running from a battery, this particular IC can be very sensitive to “dirty” power supplies. If none of these suggestions work you can connect us via support@kitronik.co.uk.

    Posted by Michael Lockhart on Monday, 20 April 2015
Posted by Peter, Tuesday, 20 January 2015 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A:

    There could be a few issues for this. If you send a picture of the top and bottom of the circuit board, also include a picture of the connection to the speakers to support@kitronik.co.uk then we can try and work out what might be causing the fault.

    Posted by Michael Lockhart on Tuesday, 20 January 2015
Posted by ahmed ahmed, Thursday, 11 September 2014 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: Hi, we don't do a samples of some of our more expensive kits due to the cost, the Radio falls into this category unfortunately.
    Posted by Aaron Sturman on Thursday, 11 September 2014
Posted by Juha Manninen, Wednesday, 7 May 2014 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: 1.All the parts are new and if assembled correctly it works. 2.This depends on your address and delivery option but the website can give you a quote at checkout. 3.This does receive standard FM range 88-108MHz I don't know if it will work with an ipad in the way you are asking. 4.This kit is not available pre-assembled.
    Posted by Aaron Sturman on Wednesday, 7 May 2014
Posted by Jack, Wednesday, 23 April 2014 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: Hi, The stations it can pick up depend on where you are and the angle and size of the aerial. You will find that you can only pick up certain stations with the aerial being held in specific places. You could try extending the aerial wire and see if that helps. Capital is usually a strong signal near most major cities though so I'm surprised you can't pick it up It's very unlikely to be a fault if you can pick up other stations.
    Posted by Aaron Sturman on Wednesday, 23 April 2014
Posted by Moose, Friday, 11 April 2014 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: Hi Martin, I would try swapping the power supply for a 9V battery to see if that solves the problem. I think it could be the case that the 9v power pack isn't providing a clean enough supply and that is messing with the decoding on the chip.
    Posted by Matt Macleod on Friday, 11 April 2014
Posted by Paul, Friday, 11 April 2014 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: Hi Paul, the FM radio doesn't work from a normal mains transformer. The reason isn't the voltage however, it's to do with the frequency modulation of the radio IC and it messes with the tuning. We are currently making a new radio kit that will work from mains as well as a battery. It should be available by summer!
    Posted by Matt Macleod on Friday, 11 April 2014
Posted by Luca, Friday, 13 September 2013 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: Hi Luca! Yes the problem you describe sounds like a loose connection.You should try unsoldering, then resoldering the antenna and speakers if you think they are where the problem is. You can heat the solder until it melts then use a solder sucker or some solder mop to remove the solder. With the antenna you may be able to melt the solder, then push the wire into position. If the wire have been damaged though you may be better off just cutting it near the pcb, stripping a bit of it then re soldering.
    Posted by Aaron Sturman on Friday, 13 September 2013
Posted by James Stockwell, Tuesday, 13 August 2013 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: Hi James, You can put a potentiometer knob like this one https://www.kitronik.co.uk/products/components/resistors/potentiometer-knobs/potentiometer-knob-bluegrey1/ on to the end of the tuning pot, that would make it a bit easier to tune ( it would give you roughly twice as much control). It is possible to tune the radio without any additions, the pulley system is just a suggestion for making it easier. If you are talking about wiring the pot to the board rather than soldering it into the PCB itself then that works fine. Hope that helps!
    Posted by Aaron Sturman on Tuesday, 13 August 2013
Posted by Steve, Monday, 15 April 2013 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: It should be possible however it would require several components to be altered according to the specification sheet that I will email over to you.
    Posted by Aaron Sturman on Monday, 15 April 2013
Posted by tjdimacali, Monday, 25 March 2013 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: The potentiometers aren?t in a position in the circuit where they could cut the power so it isn?t possible to replace one with a potentiometer with a switch and use that to turn the power off. You could cut the volume but you can already do that by turning the potentiometer to full resistance. Also making a light glow in sync with the audio isn?t as easy as you might hope. To get a good result rather than very rapid, intermittent blinking you would need a separate circuit.
    Posted by Aaron Sturman on Monday, 15 April 2013
Posted by Alan, Thursday, 21 March 2013 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: While it is possible, it isn?t as simple as it would seem. The circuit depends on a very clean steady power supply, such as that provided by a battery, if you were to connect a standard mains to 12V DC converter in place of the battery then noise from the power supply would prevent the chip from functioning properly. If you can get a very clean DC supply then it will work.
    Posted by Aaron Sturman on Thursday, 21 March 2013
Posted by bernard, Monday, 11 February 2013 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: We recommend lead free solder due to the safety issues of using lead on a regular basis. We offer lead free solder and both 18W and 25W Antex soldering irons on the website. Either of which will be fine for any of our kits. https://www.kitronik.co.uk/products/tools-and-test-equipment/soldering/real-of-lead-free-solder/ https://www.kitronik.co.uk/products/tools-and-test-equipment/soldering/mains-soldering-iron-18w-version/ https://www.kitronik.co.uk/products/tools-and-test-equipment/soldering/mains-soldering-iron-25w-version/
    Posted by Aaron Sturman on Monday, 11 February 2013
Posted by Adam, Tuesday, 28 August 2012 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: When built correctly you should have a similar volume to a pocket radio. If you still think it is quiet then it?s likely to be to do with the assembly, in which case I?d check the following components, both the value and for dry joints: R1 ? 10K C13 ? 220nF R8 ? 10K R3 ? 100K R9 ? 100 ohms C21 ? 100uF C23 ? 200uF R10 ? 1 ohm C15 ? 100nF If you would like it to be louder then there are two possibilities, increase the voltage you are running the device off. The following lists the output power at different voltages/ battery combinations: 3x AA, 4.5V, 0.5W 4x AA, 6V, 0.75W PP3, 9V, 1.6W 8x AA, 12V, 2W If you are using 9V then you will only get 25% more volume out of it by going up to 12V. The only option left then would be to use a higher powered amplifier. In which case you would remove R8 from the radio board and connect the end of R8 that connects to C13 in to the audio in of the high power amplifier board. You will also need to connect the 0V on both boards together. You will find a high power amp kit complete with speakers and power supply under IC based kits.
    Posted by Geoff Hampson on Tuesday, 28 August 2012
Posted by George, Tuesday, 19 June 2012 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: There isn?t an on / off switch on the board, however you can easily add one by only soldering one of the PP3 clip lead wires in to the board. The other one goes to the switch, you then just need a short length of wire to go from the other terminal on the switch to the power connection on the board. Presuming you are using 9V, you would need to use a rechargeable 9V battery. Then you need to find a solar cell that has a voltage of more than 9V, since most solar cell manufactures are very optimistic as to what their cell does I?d go for at least 12V probably more and a specified current of at least 100mA. If the solar array isn?t supply with a diode, you need to add one to stop the power flowing out of the battery and in to the cell when there is no light present.
    Posted by Geoff Hampson on Tuesday, 19 June 2012
Posted by Adam, Thursday, 10 May 2012 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: The amplification section of the kit is based on the TBA820M IC and that can output 1.2W. Which is plenty loud enough to be heard by a few people in a room. The question of how long the battery lasts will depend on what battery / batteries you use and how loud the volume is. As A guide a 9V PP3 battery on full volume will last about 4 or 5 hours. Swap it for 6 C cells and it will run continuously for a week.
    Posted by Geoff Hampson on Thursday, 10 May 2012
Posted by Josh Murton, Monday, 10 October 2011 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: The radio will receive the whole FM commercial radio station range from 87MHz to 108MHz. In fact due to component tolerances it is designed to include a bit more at both ends of the range to be sure that no stations are missed off.
    Posted by Geoff Hampson on Monday, 10 October 2011
Posted by Naomi, Tuesday, 5 April 2011 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: The FM radio uses the TBA820M IC to drive the speaker. According to the datasheet at 9V it will drive 1.6W in to an 8 ohm load (one speaker) or 1.2W in to a 4 ohm load (two parallel speakers). So yes you can add a 2nd speaker provided it goes in parallel with the first speaker. This would be of benefit if you are doing a radio for product design and want it to have two speakers for its looks. Please note that adding a 2nd speaker wont give you stereo sound or twice the volume.
    Posted by Geoff Hampson on Tuesday, 5 April 2011
Posted by Tom Walton, Tuesday, 5 April 2011 on product FM Radio Kit, no longer stocked
  • 0
    vote
    A: The speaker is 66mm dia, 20mm wide and the PCB is 88 x 46mm
    Posted by Geoff Hampson on Tuesday, 5 April 2011

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