76-108MHz FM Stereo Radio DIY Kit Wireless FM Transmitter Module Frequency Modulation Electronics Soldering Practice Project

76-108MHz FM Stereo Radio DIY Kit Wireless FM Transmitter Module Frequency Modulation Electronics Soldering Practice Project DC 2.7V-3.3V Description: - The YFM-2 type radio circuit is very simple. - The total number of components does not exceed 19. - Although the number of components is not large, it includes two types of components: SMD and DIP which are suitable for novices and friends who want to practice soldering of SMD components. Features: 1>.Built-in digital automatic gain control (AGC) circuit 2>.Support the global frequency band 76-108Mhz 3>.DIY manual welding 4>.Simple and easy to operate 5>.Support radio memory function Parameter: 1>.Item name: FM Stereo Radio Module DIY Kit 2>.Item Mode:YFM-2 3>.Work Voltage:DC 3V 4>.Work Current:19mA 5>.Work Frequency:76-108Mhz 6>.Output impedance:32ohm 7>.Work Temperature:-40℃~85℃ 8>.Work Humidity:0%~95%RH 9>.Size(Installed):57*32*20mm Applicable: 1>.Training welding skills 2>.Student school 3>.DIY production 4>.Project Design 5>.Electronic competition 6>.Graduation design 7>.Crafts collection 8>.Home decoration 9>.Souvenir collection Installation Tips: 1>.User needs to prepare the welding tool at first. 2>.Please be patient until the installation is complete. 3>.The package is DIY kit.It need finish install by user. 4>.The soldering iron can't touch the components for a long time(1.0 second), otherwise it will damage the components. 5>.Pay attention to the positive and negative of the components. 6>.Strictly prohibit short circuit. 7>.Install complex components preferentially. 8>.Make sure all components are in right direction and right place. 9>.It is strongly recommended to read the installation manual before starting installation!!! Installation Steps(Please be patient install!!!): 1>.Step 1: Install 1pcs SOP-16 RDA5807PF at U1.There is a dot on one corner of the IC and there is a rectangle pad on PCB where the Pin1 of IC can place on.These two marks are corresponding to each other and are used to specify the installation direction of the IC. 2>.Step 2: Install 1pcs 30K ohm Resistor at R1. 3>.Step 3: Install 1pcs 0.1uH Inductor at L1. 4>.Step 4: Install 2pcs 1uH Inductor at L2,L3. 5>.Step 5: Install 1pcs 32.768KHz Crystal Oscillator at Y1. 6>.Step 6: Install 1pcs 24pF Ceramic Capacitor at C1. 7>.Step 7: Install 1pcs 0.01pF(103) Ceramic Capacitor at C2. 8>.Step 8: Install 1pcs 0.022pF(223) Ceramic Capacitor at C3. 9>.Step 9: Install 5pcs 6*6*5mm Switch at S1-S5. 10>.Step 10: Install 1pcs 100uF 16V Electrolytic Capacitor at C4,C5. Please pay attention to the positive and negative poles. The shorter pin is the negative pole. 11>.Step 11: Install 1pcs 3.5mm Audio Jack at J1. 12>.Step 12: Connect battery box.Pay attention to positive and negative. 13>.Step 13: Use a cable tie to fasten the battery box. 14>.Step 14: Connect to power supply and enjoy the effect.