The FNIRSI DSO-TC3 is a compact 3-in-1 handheld electronic test instrument that combines a digital storage oscilloscope (DSO), function signal generator, and intelligent transistor/component tester into a single portable device. Designed for electronics engineers, technicians, students, repair professionals, and DIY enthusiasts, the DSO-TC3 offers powerful testing capabilities in a lightweight handheld design.

The DSO-TC3 is an upgraded version of the DSO-TC2, featuring a 500kHz bandwidth, 10MSa/s real-time sampling rate, improved measurement accuracy, ESR capacitor testing, enhanced transistor detection, wider voltage measurement range, and a built-in function generator capable of producing multiple waveform outputs.

With its 2.4-inch TFT color display, rechargeable lithium battery, USB Type-C charging, and foldable stand, the FNIRSI DSO-TC3 is an ideal portable diagnostic tool for electronics development, circuit troubleshooting, embedded systems, power supply testing, Arduino projects, Raspberry Pi development, and electronics education. BDTronics supplies genuine FNIRSI test equipment in Bangladesh.

Features:

• 3-in-1 multifunction tester

  • Digital Storage Oscilloscope

  • Function Signal Generator

  • Intelligent Component Tester

• 2.4-inch TFT color display with LED backlight

• 500kHz analog bandwidth

• 10MSa/s real-time sampling rate

• Rechargeable lithium battery

• USB Type-C charging

• Portable handheld design with foldable stand

• Automatic waveform measurement and waveform freeze

• Auto, Normal and Single trigger modes

• AC/DC input coupling

• Built-in ESR capacitor measurement

• Automatic component identification

• Supports transistor, MOSFET, IGBT, SCR, TRIAC testing

• Continuity testing with buzzer

• Voltage measurement

• PWM signal detection

• Temperature and humidity measurement

• Infrared remote control decoding (NEC protocol)

• Ideal for electronics repair, laboratory, education and field service

Specifications:

Digital Oscilloscope

• Analog Bandwidth: 500kHz

• Real-Time Sampling Rate: 10MSa/s

• Display: 2.4-inch TFT Color LCD

• Input Resistance: 1MΩ

• Coupling: AC / DC

• Maximum Input Voltage: 400V

• Vertical Sensitivity (×1): 10mV/div to 10V/div

• Horizontal Time Base: 1μs/div to 10s/div

• Trigger Modes:

  • Auto

  • Normal

  • Single

• Trigger Type:

  • Rising Edge

  • Falling Edge

• Automatic Measurement: Yes

• Waveform Freeze: Yes

Function Signal Generator

• Sine Wave:

  • Frequency: 1Hz–100kHz

  • Output: 0–3.3V

• Square Wave:

  • Frequency: 1Hz–100kHz

  • Output: 3.3V

• Pulse Wave:

  • Frequency: 1Hz–100kHz

  • Duty Cycle: 0–100%

• Triangle Wave:

  • Frequency: 1Hz–100kHz

• Ramp Wave:

  • Frequency: 1Hz–100kHz

• DC Output:

  • 0–3.3V

Component Tester

• Bipolar Transistors:

  • NPN

  • PNP

  • hFE (β): 10–600

• MOSFET:

  • MOSFET

  • JFET

  • IGBT

• Diodes:

  • Forward Voltage <4.5V

• Zener Diodes:

  • 0.01V–4.5V

  • Up to 32V (Special Test Mode)

• SCR

• TRIAC

• Capacitor:

  • 25pF–100mF

  • ESR Measurement Supported

• Resistor:

  • 0.01Ω–50MΩ

• Inductor:

  • 10μH–1000mH

• Battery Voltage:

  • 0.1V–4.5V

• Input Voltage Measurement:

  • 0–40V

Sensor Support

• DS18B20 Temperature Sensor:

  • 0°C–85°C

• DHT11 Temperature & Humidity Sensor:

  • Temperature: 0°C–60°C

  • Humidity: 5–95% RH

• Infrared Remote Decoder:

  • NEC Protocol

General Specifications

• Model: FNIRSI DSO-TC3

• Display: 2.4-inch TFT Color LCD

• Power Supply: Built-in Rechargeable Lithium Battery

• Charging Port: USB Type-C (5V)

• Product Size: 79 × 103 × 31mm

• Foldable Desktop Stand: Yes

Applications

• Electronic circuit troubleshooting

• Power supply diagnosis

• PCB repair

• Mobile phone repair

• Laptop motherboard repair

• Arduino development

• ESP32 and STM32 projects

• Raspberry Pi electronics

• Signal waveform analysis

• PWM signal testing

• MOSFET and transistor testing

• Capacitor ESR testing

• Educational laboratories

• Embedded system development

• DIY electronics projects

• Industrial maintenance

• Home appliance repair

Package Includes

• 1 × FNIRSI DSO-TC3 Handheld Tester

• USB Type-C Charging Cable

• Test Leads

• User Manual

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