The ICR1260F FM radio kit uses three Sanyo (SANYO) dedicated chips to form the receiving part: LA1186N is an FM front-end chip, which is used in many home audio products. LA1260 is a FM/AM mid-amp chip, which is currently commonly used in mid-to-high-end radios. LA3361 is a very classic stereo decoder chip, and its compatible products are numerous. The combination of these three chips and 2025 dual-channel power amplifier into a simple circuit can provide higher receiving performance, suitable for amateur radio enthusiasts, and can also be used as an entry-level FM stereo equipment.
【product name】
ICR1260F integrated circuit FM radio circuit board assembly kit v1.2/v1.0
【Main Features】
1. Receiving frequency: 88~108MHz FM (frequency modulation broadcasting band);
2. Stereo demodulation: Yes;
3. Power supply voltage: 7.5V;
4. Output power: 1.5W/4Ω×2;
5. Circuit board size: 180mm x 110mm.
【Features】
1. High sensitivity, can listen to many radio stations without pulling out the whip antenna;
2. With automatic frequency control function (AFC) that can be turned off;
3. Complex and complete low-pass filter to minimize the high frequency noise output by the decoder;
4. The stereo function can be turned off manually;
5. Rich on-board interfaces and indicators, easy to debug;
6. 2025 power amplifier has high power and good sound quality;
7. Equipped with a protection board for the lithium battery, and has the protection board activation function, which is convenient and safe to use;
8. The audio capacitor adopts a large number of film capacitors, and the configuration surpasses the traditional radio cassette recorder.
【product description】
1. The circuit of this kit is designed according to the chip's official data manual and some classic cases. Practice has proved that it has the advantages of easy production and easy debugging, and the effect is far better than simple discrete circuits;
2. Capacitors that require high stability, such as resonant capacitors, are equipped with expensive mica capacitors or NPO series ceramic capacitors. The remaining capacitors with small capacity are ceramic chip capacitors or film capacitors, and the large-capacity capacitors (μF class) are electrolytic capacitors;
3. Audio coupling and filter capacitors use film capacitors or electrolytic capacitors;
4. The variable capacitor uses CBM223F special double variable capacitor for frequency modulation, which feels better;
5. The circuit board base is made of glass fiber material, the thickness measured is about 1.5~1.6mm, the single-sided green/butter white lettering, the pad is sprayed with tin, and can be directly welded without grinding;
6. There may be some scratches and dust on the base surface and copper foil surface of the board, as well as traces of washing the board;
7. The circuit board obtained by the buyer may be slightly different from the sample in the picture, mainly due to the change of component position and the same circuit structure. This product has been modified and perfected n times (mainly to modify the wiring of the circuit board) from the prototype sample to the sold product, and it is still being improved. Usually minor insubstantial modifications, such as slight movement of component positions and minor wiring adjustments will not change the version number, and will not re-photograph and upload, hereby declare;
8. The version of the kit circuit board is 1.1, and the circuit board version of the finished board is 1.0. The difference between the two is minimal and the effect is the same;
9. The manual contains circuit schematic diagrams and circuit board diagrams, as well as debugging methods and experience under amateur conditions. If you need more information and professional debugging methods, please download or refer to related books on the Internet.