Here is a very easy DIY FM receiver circuit diagram.
It is easy to build FM receiver circuit as the TA2003 IC used here, comes in easy DIP package.
It’s both Am and FM receiver IC, we’ll use FM, so FM circuit is only given. All the parts name is given in the diagram, click for a better view.
The L1, L2 and L3 coils are to made by hand. Take a 5mm diameter ferrite core, or other thing, to roll 22SWG copper wire to make those coils. Use a general purpose 500pF gang for tuning.
- L1=4T, 22SWG, 5mm dia
- L2=3T,22SWG, 5mm dia
- L3=3T,22SWG, 5mm dia
Make the connections of the GANG, coils as short as possible. The audio output should be fed to any amplifier for amplified sound output.
The main advantage of this circuit is that it requires much less current, and operates at 3V.
It could be used to check DIY FM transmitter circuits easily. Leave your comments below, your feedback is important.
1. what about the oscilator coil, how many turns?
2. i see 4 pins at the 10.7 filter, i got only those with 3 pins
3. what do you mean with 4k7 near the L2, is that an resistor?
thanks you
Thank you for your question.
OSC is a variable inductance with parallel capacitor. You can get them in shop in shape of a metal block and it will have an adjusting screw thread (ferrite cup) tunable through top hole. Ask shopkeeper for FM Oscillator coil.
10.7Mhz ceramic resonator has 3 pins. The middle pin is connected to both the upper line and the lower line.
Yes, 4K7 is a resistor. It's 4.7K-Ohm
kindley send me circut for 3v operated fm receever circuit, and details .
thanking you s/d
It's given above.
the element after the +3v input, it's a resistor? what value is 47E?
It's 47 Ohm resistor.
and what is the 47/16 element above the resonator? please help 🙂
It's 47 microFarad 16 Volts electrolytic polarized capacitor.
thanks for the answer 🙂
Is the IC used is costly in INDIA?
No. It costed around 20Rs (back in 2006).
What happens if dont use the oscillator? Should we use exact value capacitors? plzz reply
You must use the oscillator and exact value capacitors.
Can this IC be replaced with CD2003GP?
I guess that's a replica of the original IC. You can use it.
Yes......hwcat--"csc2003p" is a chinese replica of ta2003p
Can this IC be replaced by TA2003
What a foolish question!
Can the output from this reciever be directly fed to audio amp using LA4440 or we have to use any pre-amp's.
Yes, it can be directly fed to an audio amplifier.
I found 3 pins each on up and down side of OSC the side leads are extension of metal cap how to connect this in the circuit.
Take a close look from the bottom, you'll see wires are connected to only two pins. Use those two pins here.
I have 18pf capacitor can i use it in place of 15pf cap?
You can try with 18pf caps but I can't guarantee it will work. You can buy a 0-22pf adjustable capacitor from market and tune it at 15pf.
Hi Arup, have not set this up but am just wondering why pin 14 is not connected to VCC fro FM? The datasheet for the TA2003 says that it must be connected to VCC for FM and left open for AM.
Also, why is the coil in Pin 10 called an OSC when it is at 10.7 Mhz? Just wondering cuz datasheet shows what look like a symbol for crystal at 10.7Mhz. What does that coil do?
Thanks.
I helped many Indian friends build RC transmitter and receiver where I have lots of experience.
Bravokilo (pen name)
Excuse me arup. I just try help give the answer.
PIN 14 should BE connected to vcc for fm. Local oscillator coil at PIN 13 not 10.
Pin 10 is part of quadrature fm detector which should BE resonance LC 10.7Mhz adjust IT value for best clear sound, and can BE change use ceramic resonator, can't ceramic filter or xtal
Thats all
Hello Mr. Gani Saputra Albatami, as of now Arup doesn't maintain this site very actively. And I've no idea about TA2003 IC, it's pretty obsolete now.
Anyway I'll update the schematic from the datasheet.
Poor shematic
Again, Pin 10, am not sure if the datasheet meant ,crystal or simply ceramic filter or capacitor.
BK is correct refer to datasheet. Pin 10 is fm descriminator or audio detector part. Use IT if fm blue color or ceramic resonator. Can't use ceramic filter or xtal filter. May arups circuits wrong as he just human and make mistakes like us.
hola que tal que es PVC GANG
What are the pin configuration of 10.7mhz crystal
The centre pin in ground and other two pin's orientation doesn't matters.
A good tip though, thanks ! I'll add a picture of the ceramic resonator's pin out.