DIY Kit FM Stereo Radio Module 76-108MHz Wireless Receiver DC 3V Circuit PCB Board Solder Practice Project for School Labs

1.Introduction:

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.

2.Feature:

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

3.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

4.Application:

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

5.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!!!

6.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 8: Connect to power supply and enjoy the effect.