Universal Tester for Automotive and Electronic Circuits - QDB-5A: PWM Signal Generator, Stepper Motor Driver, Ignition Coil Tester, Digital Multimeter and Basic Oscilloscope - Al

Workshop, garage or electronics lab? The QDB-5A is your versatile and powerful companion for testing, diagnosing and powering a wide range of electronic components and automotive systems. Designed for demanding technicians, engineers, and enthusiasts, this device combines several essential tools in a single compact and robust unit. Main features of your pocket workshop: High-Precision PWM Signal Generator: Generate PWM (Pulse Width Modulation) signals to test controllers, LED dimmers, or actuators. Fine-tuning of frequency (1 Hz to 100 kHz) and duty cycle (0% to 100%). Adjustable output current up to 1.5A via the VADJ output, perfect for simulating sensor signals or driving small devices. loads.

• Powerful Stepper Motor Driver:

  • Test and run bipolar or unipolar stepper motors directly.

  • High output capacity up to 15A (maximum current), sufficient for most small and medium power motors.

  • Ideal for verifying proper motor operation before installation or for prototypes.

• Ignition Coil and High Voltage Circuit Tester:

  • Quickly check the integrity and performance of coils ignition

• , spark plugs and vehicle ignition circuits.

• Generates a test spark for quick visual diagnosis.

• Built-in Digital Multimeter:

  • Measure DC voltage (0-30V) and resistance (0-1 MΩ) directly on the device for quick checking without additional tools.

• Adjustable Power Supply & Basic Oscilloscope:

  • Adjustable DC input power (9-26V) to adapt to different sources (12V battery, mains power).

  • Main output up to 2.5A for powering or testing circuits.

  • Basic waveform display function to observe the generated PWM signal.

Technical Specifications and Design:

• Input Power Supply:Wide range of 9V to 26V DC (compatible with 12V batteries) (Automotive).

• Outputs:

  • Main Output: Max Current 2.5A.

  • Adjustable VADJ Output: Max Current 1.5A.

  • Stepper Motor Driver: Max Output Current 15A.

• Multimeter:Measures DC 0-30V / Resistance 0-1 MΩ.

• PWM Generator:Frequency 1-100 kHz / Duty Cycle 0-100%.

• Compact dimensions:157 x 98 x 30 mm -Lightweight: ~0.4 kg. Perfect for portability.

• Display:LCD digital screen for settings and measurements.

Ideal Applications:

• Automotive Diagnostics:• Testing ignition coils, sensors, signal simulator for troubleshooting.

• Electronic Repair:• Testing circuits, stepper motors (3D printers, CNC), generating test signals.

• Prototyping and Development:• Powering and driving components during design.

• Teaching and Training:• Educational tool for understanding PWM, stepper motors, and power electronics.

⚠️ Safety Warning and Prerequisites:
This device is a test and diagnostic tool for experienced users with knowledge of electronics and electricity.

• Knowledge of the circuits being tested is required.

• Always observe the specified polarities and current/voltage ranges to avoid damage to the device or the component under test.

• Not suitable for complete beginners without supervision.