Multi-function LED Digital Electronic Clock DIY Kit

1. Introduction

This manual provides detailed instructions for assembling, operating, and maintaining your Multi-function LED Digital Electronic Clock DIY Kit. This kit allows you to build a versatile clock with features such as time display, temperature monitoring, countdown timer, and alarm functions. Please read these instructions carefully before beginning assembly.

2. Components Overview

The kit includes various electronic components and acrylic parts for the casing. Ensure all parts are present before starting assembly.

Key components on the circuit board include:

• Coin Cell Battery: For backup power to maintain settings.
• Electric Motor: For vibration alerts.
• Photoresistor: For intelligent brightness adjustment.
• Microcontroller: The main processing unit.
• Buzzer: For audible alerts.
• Crystal: Provides timing signals for the microcontroller.
• Lithium Battery: Main rechargeable power source (if included/installed).
• Charging Port: DC 3.5*1.2mm interface for power and charging.

3. Assembly Instructions

This kit requires soldering. Please ensure you have the necessary tools and experience. Refer to the video tutorial for visual guidance.

1. Prepare the Circuit Board: Before soldering the digital tube, carefully check the circuit board for any un-soldered pads, especially on the back of the U1 chip. Ensure all connections are clean.
2. Solder the Digital Tube: The digital tube has a row of white dots on the bottom for correct alignment during installation. Solder it securely to the circuit board.
3. Install Button Battery: Insert the CR1220 lithium cell button battery into its holder on the circuit board. Ensure the negative pole faces down and the positive pole faces up.
4. Assemble the Case:
   1. Remove the protective film from all acrylic case panels.
   2. Install the copper pillars onto the baseplate.
   3. Carefully align the circuit board with the baseplate and secure it with two nuts.
   4. Attach the two side panels, followed by the two long side panels.
   5. Finally, place the top panel and fix it with screws.
5. Power Connection: Connect the DC 3.5*1.2mm power cable to the charging port. The clock can be powered via USB or the installed rechargeable lithium battery.

4. Operating Instructions

The clock features four buttons (S1, S2, S3, S4) for various functions and settings.

4.1. Initial Debugging and Power-On

After assembly, connect the DC power. The clock should power on. If not, check all connections and soldering points. The DC interface is also used to charge the internal battery.

4.2. Setting Modes and Functions

Press and hold the S4 button for approximately 3 seconds to enter the settings interface. Use S1, S2, S3 to navigate and adjust values, and S4 to confirm or switch between settings.

• FU1: Set Time
  Adjust the hours and minutes.
• FU2: Set Date
  Adjust the year, month, and day.
• FU3: Set Alarm 1
  Set the time for the first alarm.
• FU4: Set Alarm 2
  Set the time for the second alarm.
• FU5: Display Mode Settings
  The first digit of the display indicates the mode:
  • 0: Turns off the hour chime.
  • 1: Displays time and regularly displays temperature.
  • 2: Displays time, regularly displays date, and temperature.
  • 3: Only shows temperature.
• FU6: Vibration Settings
  This setting controls the vibration circuit.
  • 0: Vibration off.
  • 1: Vibration on.

4.3. Display Modes

The clock supports four display modes:

1. Time only
2. Time and Temperature
3. Time, Date, and Week
4. Time, Temperature, Date, and Week

These can be configured via the settings menu (FU5).

4.4. Stopwatch and Countdown

The clock includes stopwatch and countdown functionalities. The countdown function can be set to trigger vibration or ringing prompts upon completion.

4.5. Light Control Brightness

The integrated photoresistor intelligently adjusts the digital tube brightness based on ambient light, ensuring readability during the day and preventing glare at night.

5. Specifications

6. Troubleshooting

• Clock not powering on: Check the DC power connection and ensure the lithium battery is charged or correctly installed. Verify all soldering points, especially for the power input and main chip.
• Digital display issues: Ensure the digital tube is correctly soldered and aligned. Check for any short circuits or cold solder joints.
• Functions not responding: Verify that the buttons are correctly installed and making proper contact. Re-check the microcontroller's connections.
• Inaccurate time/temperature: Ensure the crystal oscillator is correctly installed. For temperature, ensure the photoresistor is not obstructed.
• Alarm/Vibration not working: Check the connections for the buzzer and electric motor. Verify settings in the operating menu (FU3, FU4, FU6).

7. Maintenance

• Cleaning: Use a soft, dry cloth to clean the acrylic case and display. Avoid using harsh chemicals or abrasive materials.
• Battery Care: If using a rechargeable lithium battery, ensure it is charged regularly to maintain optimal performance. Avoid overcharging or completely draining the battery.
• Storage: Store the clock in a dry, dust-free environment away from direct sunlight and extreme temperatures.
• Component Replacement: In case of component failure, replace with equivalent parts. Consult the schematic diagram (Figure 5.3) for component values.

8. User Tips

• Soldering Best Practices: For beginners, practice soldering on scrap boards before working on the main circuit. Use a fine-tip soldering iron and lead-free solder for best results.
• Protective Film: Remember to peel off the protective film from both sides of all acrylic case pieces for a clear finish.
• Battery Orientation: Always double-check the polarity when installing the button battery to prevent damage.
• Customization: As a DIY kit, you have the flexibility to experiment with different display modes and alarm settings to suit your preferences.

9. Warranty and Support

This DIY kit is intended for educational and hobbyist purposes. Due to the nature of self-assembly, specific warranties may vary. For technical assistance or inquiries regarding missing/defective components, please contact the seller or manufacturer directly. Ensure you retain your purchase records for any support claims.