The Techstar QDB-5A is a professional tester for automotive devices that combines an oscilloscope, digital multimeter, PWM signal generator, and driver for ignition coils, injectors, stepper motors, and various electronic valves into a single unit. Ideal for auto repair shops and electronics technicians, it allows simulation and testing of most electronically controlled components.

Main Functions:

• Ignition coil / ignition system test: Drives and tests simple ignition coils, coil clips, or ignition units to check waveform and spark energy.
• Gasoline and diesel injector test: Supports 12 V injectors for gasoline engines and 12 V / 24 V injectors for diesel, with frequency and pulse width (duty cycle) control.
• Valve and analog valve driver: Can operate fuel dosing valves, EGR valves, DRV valves, pressure valves, etc., via PWM signal with adjustable duty cycle.
• Motor and stepper motor control: Drives duty cycle-controlled motors, including urea pump motors, idle stepper motors, and central light motors.
• PWM / Hall signal generator: Adjustable frequency 1–100 kHz and duty cycle 0–100%, with adjustable load brake, to simulate sensors with duty cycle signals.
• Built-in oscilloscope: Oscilloscope mode with color TFT display for visual monitoring of electrical signal waveforms.
• Digital multimeter (DMM): Measures DC voltage, resistance, current, capacitance, and diodes, displaying all parameters clearly on the screen.
• Adjustable voltage source (VADJ): Adjustable voltage output to power components with current monitoring and overload protection.

Technical Specifications:

• Model: QDB-5A
• Power supply: DC 8–26 V
• VADJ output: maximum current 1.5 A
• Digital multimeter (DMM): DC voltage: 0–30 V, Resistance: 0–1 MΩ, Current test, Separate capacitance test from 10 nF – 1000 µF
• Dimensions: 157 × 98 × 30 mm
• Set weight: approximately 0.38 kg
• Display: Color TFT screen with graphical interface.

Package Contents:

• 1 × QDB-5A Automotive Tester
• 1 × Power cable with clip
• 4 × Single plugs
• 3 × Test cables
• 1 × Idle stepper motor plug
• 1 × Soldered stepper motor cable.

The QDB-5A tester covers a wide range of automotive components - injectors, ignition coils, pressure sensors, and stepper motors, providing a compact solution for professional diagnostics and reducing troubleshooting time.