FNIRSI DSO-TC3 3-in-1 Handheld Digital Oscilloscope & Component Tester
Portable Digital Oscilloscope, Transistor Tester & DDS Signal Generator
The FNIRSI DSO-TC3 is a versatile, battery-powered 3-in-1 handheld test instrument that combines a 10 MS/s Digital Oscilloscope, an Automatic Component Tester, and a DDS Signal Generator into a single compact device. An upgraded evolution of the DSO-TC2, the TC3 features improved CPU performance, higher oscilloscope bandwidth, and expanded component identification capabilities.
Equipped with a crisp 2.4-inch color TFT display and an internal rechargeable lithium battery, this pocket-sized multi-tool allows makers, technicians, and engineers to diagnose circuits, test components, and analyze waveforms on the go.
Key Features
3-in-1 Multi-Functional Design: Integrates a digital oscilloscope, transistor/component analyzer, and signal generator in one handheld tool.
500 kHz Digital Oscilloscope: Delivers a 10 MS/s real-time sampling rate with one-key AUTO setup to quickly display stable waveforms without complex adjustments.
Automatic Component Identification: Instantly identifies pinouts and key values for NPN/PNP transistors, MOSFETs, diodes, Zener diodes, resistors, inductors, and capacitors.
Integrated DDS Signal Generator: Outputs 6 built-in signal waveforms (Sine, Square, Pulse, Triangle, Ramp, DC) with adjustable frequency and duty cycle.
IR Remote Signal Decoder: Decodes NEC protocol infrared remote control codes directly on screen for easy remote troubleshooting.
Rechargeable USB-C Battery: Built-in 1500 mAh lithium battery provides hours of continuous field use and recharges via standard USB Type-C.
Typical Applications
Electronics Workbench & Prototyping: Rapid sorting and verification of unknown or unlabelled electronic components before soldering.
Field Repairs & On-Site Diagnostics: Analyzing low-frequency sensors, audio circuits, PWM motor controllers, and power supplies without hauling bulky benchtop scopes.
Educational & Maker Labs: An affordable entry tool for learning signal analysis, component behavior, and circuit troubleshooting.
Technical Specifications
Parameter Specification Display 2.4-inch TFT Color Display (320 × 240 pixels) Power Supply Built-in 1500 mAh Lithium Battery (USB Type-C 5V charging) Oscilloscope Bandwidth 500 kHz Real-Time Sampling Rate 10 MS/s Max Measured Voltage ±40V (1X probe) / ±400V (10X probe) Signal Generator Waveforms Sine, Square, Pulse, Triangle, Ramp, DC (1 Hz – 100 kHz) Transistor Test Range Capacitors (25 pF – 100 mF), Resistors (0.01 Ω – 50 MΩ), Inductors (10 µH – 1000 H) Dimensions 79 mm × 103 mm × 31 mm Package Includes
1 × FNIRSI DSO-TC3 3-in-1 Handheld Tester
1 × P6100 High-Voltage Oscilloscope Probe (with 10X Adapter)
3 × Test Hooks / Clips
1 × Standard BNC Test Clip Cable
1 × USB Type-C Charging Cable