Gaqqee DSO183 Digital Oscilloscope DIY Kit Instruction Manual

1. Introduction

The Gaqqee DSO183 Digital Oscilloscope DIY Kit is designed for electronic enthusiasts, students, and educators. This kit provides a hands-on experience in assembling a functional digital oscilloscope, offering a compact and stable design suitable for various experimental environments. It features a built-in signal generator and waveform storage capabilities, making it a versatile tool for learning and exploring electronic circuits.

2. Package Contents

The DSO183 Digital Oscilloscope DIY Kit includes the following components:

• Main circuit board (pre-soldered SMD components)
• Various resistors (e.g., 100K, 1.8M, 200K, 2M, 20K, 300Ω, 18Ω, 1.2K, 12Ω, 47Ω, 3KΩ, 16KΩ)
• Capacitors (e.g., 0.1uF, 220pF, 100nF, 30pF, 0.01uF)
• Diodes (e.g., 1N4148)
• Switches and buttons
• BNC socket
• USB Type-C socket
• USB power cord
• Probe with alligator clips
• Acrylic panels (front and rear)
• Nylon posts and locking screws for panel assembly

3. Setup and Assembly

This section guides you through the assembly process of your DSO183 Digital Oscilloscope DIY Kit. Please follow the steps carefully.

3.1. Component Identification and Soldering

Before you begin soldering, it is crucial to identify each component correctly. The main circuit board has SMD components pre-soldered, but through-hole components like resistors, capacitors, and switches need to be installed.

1. Identify Resistors: Use a multimeter to verify the resistance value of each resistor. The video below demonstrates this process. Match the measured values to the corresponding locations on the PCB and the provided circuit diagram.
2. Solder Resistors: Carefully insert the leads of each resistor into its designated holes on the PCB. Bend the leads slightly to hold the component in place, then solder them from the bottom side of the board. Trim any excess leads.
3. Solder Other Components: Proceed with soldering other through-hole components such as capacitors, diodes (paying attention to polarity), switches, and the BNC/Type-C sockets. Refer to the circuit diagram (Figure 4: Circuit Diagram) for correct placement.

3.2. Panel Assembly

Once all electronic components are soldered, assemble the protective acrylic panels.

1. Align the front and rear acrylic panels with the oscilloscope circuit board.
2. Secure the panels using the provided nylon posts and locking screws. Ensure all connections are snug but do not overtighten.

At this point, the entire oscilloscope assembly work is completed.

4. Operating Instructions

The DSO183 Digital Oscilloscope is designed for intuitive operation. Familiarize yourself with the connectors, switches, and keys for effective use.

4.1. Basic Operation Methods

• [SEL] button: Use this button to select the parameter you wish to adjust. The currently selected parameter will be highlighted on the screen.
• [+] and [-] buttons: After selecting a parameter with the [SEL] button, use the [+] and [-] buttons to adjust its value.
• [OK] button: Press the [OK] button to 'frame' the waveform, which enters a pause acquisition state. Press it again to resume continuous waveform acquisition.
• Coupling Switch (CPL): This switch allows you to select the input coupling mode:
  • DC: Direct Current coupling. Passes both AC and DC components of the signal.
  • AC: Alternating Current coupling. Blocks the DC component, allowing only the AC component to pass.
  • GND: Ground coupling. Disconnects the input signal and grounds the oscilloscope input (0V input), useful for establishing a 0V reference.
• Sensitivity Switches [SEN1]/[SEN2]: These switches are used to adjust the vertical sensitivity of the oscilloscope. The actual sensitivity is the product of the values set by [SEN1] and [SEN2], and this value is displayed in the lower left corner of the screen.

4.2. Waveform Generation

The DSO183 includes a built-in signal generator capable of producing various waveforms:

• SINE: Sine wave signal.
• TRI: Triangle wave signal.
• SQR: Square wave signal.
• 1KHz/3.3V: A fixed 1KHz square wave at 3.3V for testing.

Select the desired waveform using the corresponding buttons on the device.

4.3. Waveform Storage and Recall

The device supports saving and quickly retrieving waveforms, which is useful for comparative analysis and repeated use in experiments.

5. Specifications

6. Maintenance

To ensure the longevity and optimal performance of your DSO183 Digital Oscilloscope, follow these maintenance guidelines:

• Cleaning: Use a soft, dry cloth to clean the device. Avoid using abrasive cleaners or solvents, which can damage the plastic and electronic components.
• Storage: Store the oscilloscope in a dry, dust-free environment when not in use. Avoid extreme temperatures and humidity.
• Handling: Handle the device with care. Avoid dropping it or subjecting it to strong impacts.
• Power Supply: Always use a stable DC 5V power source via the Type-C USB interface.

7. Troubleshooting

If you encounter issues with your DSO183, consider the following common troubleshooting steps:

• No Power: Ensure the USB Type-C cable is securely connected to a working 5V power source. Check the cable for any damage.
• No Display: Verify that the screen is properly connected to the main board. If it's a DIY kit, double-check all solder joints related to the display.
• Incorrect Waveform Display:
  • Check the input signal source and connections.
  • Ensure the Coupling Switch (CPL) is set appropriately (DC, AC, or GND).
  • Adjust the Sensitivity Switches ([SEN1]/[SEN2]) and Horizontal Time Base to match the input signal characteristics.
  • Verify the probe is correctly connected and functioning.
• Signal Generator Not Working: Ensure the correct waveform button (SINE, TRI, SQR) is selected and the output is connected to a load or the oscilloscope input.
• Assembly Issues: If the device does not function after assembly, carefully re-examine all solder joints for cold joints or bridges. Verify component placement and polarity against the circuit diagram.

8. User Tips

• Component Verification: Before soldering, always use a multimeter to verify the values of resistors and other components to prevent errors.
• Solder Quality: Ensure all solder joints are shiny and smooth, indicating a good connection. Avoid cold joints (dull, grainy appearance) and solder bridges (unintended connections between pads).
• Polarity Check: Pay close attention to the polarity of components like diodes and electrolytic capacitors during installation. Incorrect polarity can lead to component damage.
• Refer to Documentation: For detailed schematics and further technical information, refer to the document download links provided on the back of the circuit board (via QR codes).

9. Warranty and Support

For any warranty claims, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase records as proof of purchase.