Radio

I was very interested in making my own radio. If you think for a minute, you could understand how amazing this technology is. It consists of two main parts - transmitter and reciever. Firstly, the transmitter generates an electrical signal, which is then modulated to encode the information to be transmitted. This modulated signal is fed to an antenna, which emits electromagnetic waves. Then the receiver picks up radio waves using its antenna. In the receiver, the reverse process occurs - the waves are converted into an electrical signal. Finally, this signal is cleaned of noise and interference, then demodulated to extract the original information and it's reproduced in a speaker.
Supplies
In this project we don't have a very large list of components that we need.
PASSIVE ELEMENTS:
R1 - 10k
R2 - 22k
R3 - 10
RP3 - 22k
C1 - 220pF
C2 - 330pF
C3 - 100nF
C4 - 220pF
C5 - 150pF
C6 - 3.3nF
C7 - 330pF
C8 - 47-141pF (I just used three 47pF capacitors in parallel, but this value is changeable as it controlls recieved frequency, so you can experiment and try different values)
C9 - 100nF
C10 - 22nF
C11 - 10nF
C12 - 3.3nF
C13 - 180pF
C14 - 2.2nF
C15 - 2.2nF
C18 - 100nF
C19 - 180pF
C20 - 100nF
U10 - 4.7uF
U11 - 470uF
U5.1 - 7-20pF (You can use variable capacitor with bigger range)
C17 (inductor coil) - 56nH
Antenna
Speaker
ACTIVE ELEMENTS:
Battery 9V
TDA7000 (FM reciever)
LM386 (Amplifier)
Circuit


The circuit is pretty simple. TDA7000 does main job. All you need is to connect it according to datasheet, which is the second picture.Then output signal goes on amplifier LM386 and then this signal goes to the speaker. As I have already mentioned, you can adjust the value of capacitor C8. Try to experiment with different values.
The Coil
It was pretty hard to find 56nH inductor coil, so I thought it's much easier to make one by yourself. I used 22AWG wire and removed isolation. Then you should use some cylindrical object (I used my pen) and wind copper. Make 6-7 skeins.
Making the Ciruit

Now you can place all components on your breadboard. I'd like to warn you - don't place inductor coil near the variable capasitor like I did. It'll create a lot of noice while you try to adjuct capacity. You can also solder this project on ciruit board, but remember to not solder ICs straight away. They'll get damaged by the heat of soldering iron. Use IC holder.
Results

Here you can see how the radio works. This is simple project, so I'm sure you'll be able to create such interesting technology by yourself!