FM Radio DIY Electronic Kit HU-017ASW RDA5807 User Manual

1. Introduction

The HU-017ASW is an RDA5807 87.0MHz-108.0MHz Wireless FM Radio Receiver DIY Kit featuring a 4-bit digital tube display. This kit is designed to meet the FM receiving frequency needs of users worldwide, offering two power supply modes for both home and outdoor use.

This DIY electronic product provides an engaging way to understand circuit design more clearly and enhance soldering skills. It's an excellent project for electronics hobbyists, beginners, students, and for educational purposes.

Key Features:

• Wide FM Frequency Range: 87.0MHz-108.0MHz, utilizing the RDA5807 FM data processor.
• Adjustable Volume: Features both button and potentiometer-based volume control with 15 levels.
• Audio Output Options: Includes a built-in 0.5W power amplifier for direct 8ohm speaker drive, and an AUX interface for headphones or external loudspeakers.
• Clear Display & Protection: Equipped with a 25cm dedicated FM antenna, a 4-bit red digital tube for real-time frequency display, and a transparent acrylic shell to protect the internal circuit board.
• Dual Power Supply: Supports 5V USB power and 3V battery power.
• DIY Hand Soldering: Designed as a DIY kit to improve soldering skills and foster interest in electronics.

2. Safety Information

• Always exercise caution when working with electronic components and soldering tools.
• Ensure proper ventilation in your workspace to avoid inhaling solder fumes.
• Wear appropriate personal protective equipment, such as safety glasses and anti-static gloves or wristbands, to prevent damage to components and for personal safety.
• Avoid touching components with a hot soldering iron for more than 1.0 second to prevent damage.
• Pay close attention to the positive and negative polarities of components during installation to prevent short circuits and damage.
• Strictly prohibit short circuits in the circuit.
• Install LEDs according to specified rules; incorrect installation may prevent them from lighting up.
• It is not recommended to connect both USB power supply and AA battery at the same time.

3. Package Contents

Before beginning assembly, please verify that all components listed below are present in your kit. Refer to the image for a visual representation of the kit contents.

Note: Users can complete the installation according to the PCB silk screen and component list.

4. Assembly Instructions

This kit requires hand soldering. Please be patient and follow the steps carefully. It is highly recommended to read through all instructions before starting.

For detailed visual guidance on each step, please refer to the official PDF User Manual: Download PDF Manual.

Required Tools:

• Soldering iron (<50 Watt)
• Rosin core ("radio") solder
• Wire cutters
• Wire strippers
• Philips screwdriver
• Tweezers (recommended for SMD components)
• Solder sucker or desoldering braid (for correcting mistakes)

General Installation Tips:

• Install complex components first.
• Ensure all components are oriented correctly and placed in the right location.
• Pay attention to the positive and negative polarities of components.
• The PCB silk screen and component list are your primary guides.

Step-by-Step Installation:

The following steps outline the assembly process. For visual aids and detailed diagrams for each step, please consult the provided PDF manual.

1. Install 74HC595D Register (U3): Install the SOP-16 74HC595D Register FM Receiver at U3. Align the white gap on the PCB silk screen with the dot mark on the IC for correct orientation. (Refer to Step 1 in the PDF manual for detailed image.)

   Soldering Tip for SMD components: Apply a small amount of solder to one pad on the PCB. Hold the IC with tweezers, align it, and solder that one pin. Then, solder the remaining pins. If excess solder covers multiple pins, use a solder sucker or desoldering braid to remove it.

2. Install AMS1117-3.3V Voltage Converter (U10): Install the SOT-223 AMS1117-3.3V Voltage Converter at U10 using the same SMD soldering method. (Refer to Step 5 in the PDF manual for detailed image.)
3. Install RDA5807M FM Receiver (U1): Install the SMD RDA5807M FM Receiver at U1, paying attention to its installation direction. (Refer to Step 6 in the PDF manual for detailed image.)
4. Install Metal Film Resistors:
   • Install 8pcs 510ohm Metal Film Resistors at R7-R14. (Refer to Step 7 in the PDF manual.)
   • Install 5pcs 1Kohm Metal Film Resistors at R6, R17-R20. (Refer to Step 8 in the PDF manual.)
   • Install 5pcs 10Kohm Metal Film Resistors at R2-R5, R16. (Refer to Step 9 in the PDF manual.)
5. Install SMD Micro USB Socket (DC): Install the 2-pin SMD Micro USB Socket at DC. (Refer to Step 10 in the PDF manual for detailed image.)
6. Install DIP-28 IC Socket (U2): Install the DIP-28 IC Socket at U2. Match the gap mark on the socket with the corresponding mark on the PCB silk screen. (Refer to Step 11 in the PDF manual for detailed image.)
7. Install DIP-8 IC Socket (U9): Install the DIP-8 IC Socket at U9, matching the gap mark for correct orientation. (Refer to Step 12 in the PDF manual for detailed image.)
8. Install Red LED (D1): Install the 3mm Red LED at D1. The longer pin of the LED connects to the '+' pad. (Refer to Step 13 in the PDF manual for detailed image.)
9. Install Ceramic Capacitors: Install 4pcs 0.1uF 104 Ceramic Capacitors at C1, C2, C6, C9. (Refer to Step 14 in the PDF manual for detailed image.)
10. Install AUX Audio Socket (U4): Install the 3.5mm AUX Audio Socket at U4. (Refer to Step 15 in the PDF manual for detailed image.)
11. Install Toggle Switch (P5): Install the Toggle Switch at P5. (Refer to Step 16 in the PDF manual for detailed image.)
12. Install Electrolytic Capacitors (C4, C5, C7, C8): Install 4pcs 100uF 16V Electrolytic Capacitors at C4, C5, C7, C8. Ensure correct polarity; the longer pin is the positive pole. (Refer to Step 17 in the PDF manual for detailed image.)
13. Install S8550 Transistors (Q1-Q4): Install 4pcs TO-92 S8550 Transistors at Q1-Q4. Match the arc on the PCB with the arc on the component for correct orientation. (Refer to Step 18 in the PDF manual for detailed image.)
14. Install 4-Bit Red Digital Tube (U7): Install the 4-Bit Red Digital Tube at U7, paying attention to the direction of the decimal point. (Refer to Step 19 in the PDF manual for detailed image.)
15. Install 1uF 50V Electrolytic Capacitor (C3): Install the 1uF 50V Electrolytic Capacitor at C3. Ensure correct polarity (longer pin is positive). This capacitor should be placed horizontally, maintaining a 2mm distance from the PCB. (Refer to Step 20 in the PDF manual for detailed image.)
16. Install 200Kohm Potentiometer (R1): Install the 200Kohm Potentiometer at R1. (Refer to Step 21 in the PDF manual for detailed image.)
17. Install Black Buttons (S1-S4): Install 4pcs 6*6*8mm Black Buttons at S1-S4. Ensure they are installed vertically to avoid interfering with the acrylic plates. (Refer to Step 22 in the PDF manual for detailed image.)
18. Connect Speaker: Connect the Red/Black wire from the 0.5W 8ohm Speaker to the PCB. (Refer to Step 25 in the PDF manual for detailed image.)
19. Fix FM Radio Antenna: Fix the FM Radio Antenna at U6 on the PCB back using an M2*6mm Screw and M2 Nut. Apply a large amount of solder to cover the screw and nut to secure the antenna. (Refer to Step 27 in the PDF manual for detailed image.)
20. Connect AA*2 Battery Box: Connect the AA*2 battery box to the PCB. The red wire connects to the '+' pad. (Refer to Step 28 in the PDF manual for detailed image.)
21. Attach Speaker and Battery Box: Paste the speaker and battery box onto the PCB back using double-sided adhesive tape. Pay attention to the white line area on the PCB to define their positions. (Refer to Step 29 in the PDF manual for detailed image.)
22. Fix Nylon Column Screws: Fix 4pcs M3*8+6mm Nylon Column Screws onto the PCB using 4pcs M3 Nuts. (Refer to Step 30 in the PDF manual for detailed image.)
23. Prepare Acrylic Shell: Tear off the protective film from the surface of all acrylic shell pieces.

    

24. Fix Bottom Acrylic Board: Fix the Bottom Acrylic Board using 4pcs M3*5mm Screws. (Refer to Step 32 in the PDF manual for detailed image.)
25. Place Side Acrylic Boards: Place the 4pcs Side Acrylic Boards around the assembly. (Refer to Step 33 in the PDF manual for detailed image.)
26. Fix Top Acrylic Board: Fix the Top Acrylic Board using 4pcs M2*22mm Screws and 4pcs M2 Nuts. (Refer to Step 34 in the PDF manual for detailed image.)
27. Final Assembly Check: Ensure all screws are tightened and the acrylic case is securely assembled.

    

For a visual guide to the assembly process, please watch the following video:

5. Operating Instructions

Once assembled, your FM Radio DIY Kit is ready for use. Here's how to operate it:

1. Power On/Off: Use the Toggle Switch (P5) to turn the radio ON or OFF.
2. Power Supply: Connect the USB Power Wire to the Micro USB 5V port (DC) or insert 2x AA batteries into the battery box (batteries not included).

   

3. Adjust Volume:
   • Press the V+ or V- buttons to adjust the volume. There are 15 volume levels.
   • To continuously adjust the volume, press and hold the V+ or V- buttons.
   • Alternatively, use a small screwdriver to adjust the Potentiometer (R1) for volume control.
4. Adjust Frequency (Tune Station):
   • Press the F+ or F- buttons to adjust the receiving frequency or tune to an FM station.
   • To continuously adjust the frequency, press and hold the F+ or F- buttons.
5. Audio Output:
   • The built-in 0.5W speaker will play audio directly.
   • For personal listening, connect headphones (not included) to the 3.5mm AUX Audio Socket (U4).

     

6. Specifications

7. Troubleshooting

• No Power/Display:
  • Check the ON/OFF switch.
  • Verify power supply connection (USB cable or AA batteries). Ensure batteries are correctly inserted and charged.
  • Inspect all power-related solder joints for cold joints or bridges.
• No Sound/Poor Sound Quality:
  • Ensure the speaker is correctly connected and its wires are not loose.
  • Check the volume level using both buttons and the potentiometer.
  • Verify the TDA2822M Amplifier (U9) and its associated components are correctly installed and soldered.
  • If using headphones, ensure they are fully plugged into the AUX Audio Socket.
• Cannot Tune Stations/Poor Reception:
  • Extend the FM antenna fully.
  • Ensure the FM antenna is securely fixed and soldered.
  • Try adjusting the frequency using both F+ and F- buttons.
  • Relocate the radio to an area with less signal interference, as it is a wireless module.
  • Verify the RDA5807M FM Receiver (U1) is correctly installed and soldered.
• LEDs Not Lighting Up:
  • Check the polarity of the Red LED (D1) and 4-Bit Digital Tube (U7). The longer pin of the LED is positive.
  • Inspect solder joints for the LEDs and digital tube.
• Incorrect Component Function:
  • Double-check the orientation of all ICs (U2, U3, U9) and transistors (Q1-Q4) against the PCB silk screen marks.
  • Ensure all resistors and capacitors are of the correct value and installed in their designated positions.
  • Look for any solder bridges (short circuits) between pins or pads.
  • Check for cold solder joints (dull, grey, or cracked solder) and re-solder if necessary.

8. User Tips

• Soldering Practice: If you are new to soldering, consider practicing on scrap components or a practice board before assembling the kit.
• Component Identification: Carefully identify each component before soldering. Resistors often have color codes, and capacitors have values printed on them.
• Power Cycle Reset: Note that every time the power is turned on, the radio station and volume settings may need to be readjusted.
• Display Always On: The digital display screen will remain ON as long as the device is powered.
• Acrylic Film: Remember to tear off the protective film from all acrylic panels before assembly for a clear finish.
• PDF Manual: For a more detailed visual guide, refer to the official PDF user manual: Download PDF Manual.

9. Maintenance

• Cleaning: Use a soft, dry cloth to clean the acrylic casing. Avoid abrasive cleaners or solvents that could damage the plastic.
• Storage: Store the radio in a dry, dust-free environment when not in use.
• Battery Care: If using batteries, remove them if the radio will not be used for an extended period to prevent leakage.
• Component Check: Periodically inspect solder joints for any signs of cracking or corrosion, especially if the device is frequently moved or exposed to vibrations.

10. Warranty and Support

As a DIY kit, this product is intended for educational and hobbyist purposes. Due to the nature of self-assembly and soldering, specific warranties on individual components or the final assembled product may vary. Please refer to the seller's terms and conditions for any applicable warranty information.

For technical support or inquiries regarding missing/defective components, please contact the seller directly through your purchase platform. Ensure you provide your order details for faster assistance.