Related Manuals for Kitronik FM Radio KIT
Summary of Contents for Kitronik FM Radio KIT
- Page 1 ESSENTIAL INFORMATION BUILD INSTRUCTIONS CHECKING YOUR PCB & FAULT-FINDING MECHANICAL DETAILS HOW THE KIT WORKS GET IN TUNE WITH THIS FM RADIO KIT Version 2.0...
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Page 2: Build Instructions
FM Radio Essentials www.kitronik.co.uk/2135 Build Instructions Before you start, take a look at the Printed Circuit Board (PCB). The components go in the side with the writing on and the solder goes on the side with the tracks and silver pads. -
Page 3: Connect The Wires
FM Radio Essentials www.kitronik.co.uk/2135 SOLER THE IC HOLDER Solder the Integrated Circuit (IC) holder into IC3. When putting this into the board, be sure to get it the right way around. The notch on the IC holder should line up with the notch on the lines marked on the PCB. - Page 4 FM Radio Essentials www.kitronik.co.uk/2135 CONNECT THE SPEAKER The kit is supplied with ½ a metre of twin cable. This cable is used to connect the speaker. Cut this to the required length for your enclosure design. Take the piece of wire that you have cut off and strip the ends of the wire. Connect one end to the two terminals on the speaker (shown right) and the other end to the board marked speaker after feeding it through the strain relief hole.
- Page 5 FM Radio Essentials www.kitronik.co.uk/2135 Adding an On / Off Switch If you wish to add a power switch, don t solder both ends of the battery clip directly into the board, instead: Solder one end of the battery clip to the PCB, either black to - or red to + .
- Page 6 FM Radio Essentials www.kitronik.co.uk/2135 Designing the Enclosure When you design the enclosure, you will need to consider: The size of the PCB (below left, height including components = 22mm). How big the battery (or batteries) are. How to mount the speakers (below right).
- Page 7 FM Radio Essentials www.kitronik.co.uk/2135 How the FM Radio Works To aid the description of the circuit, we have split it into two parts. The first deals with the decoding of the FM radio signal and the second deals with the audio amplification.
- Page 8 FM Radio Essentials www.kitronik.co.uk/2135 Battery voltage Speaker 1 TBA820M 470pF Audio Gain input 220nF 220uF Input Output 470uF 100nF 100R 100K 100uF 100nF Audio amplification The audio amplification is performed by another Integrated Circuit or IC called a TBA820M. Inside the TBA820M are lots of transistors, which are connected together to allow the small input signal to be amplified into a more powerful output that can drive a speaker.
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Page 9: Online Information
/ omissions in the notes. Kitronik Ltd - Any unauthorised copying / duplication of this booklet or part thereof for purposes except for use with Kitronik project kits is not allowed without Kitronik s prior consent.
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