• Full view of the 5V and 3.3V digital logic test pen with DuPont wires.
  • Dimensions of the logic test pen showing 102mm length and 15.5mm width.
  • Back view of the printed circuit board for the logic tester pen.
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V/3.3V Digital Logic Test Pen | Fast Circuit Debugging Tester

V/3.3V Digital Logic Test Pen | Fast Circuit Debugging Tester

🔥 4 sold•✓ In stock
$83.00 TWD
$83.00 TWD
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Short Product Description

Stop slowing down your workflow with a bulky multimeter! The 5V/3.3V Logic Test Pen is a handheld, essential tool for instant digital circuit debugging. Featuring a spring-loaded probe and a clear three-color LED display (Red, Green, Blue), it instantly identifies high, low, and high-impedance states. Perfect for DIY electronics, STEM learning boards, and professional PCB repairs.

Key Features

  • Instant Visual Feedback: Three-color LED system (Red/Green/Blue) instantly identifies High, Low, and High-Impedance states without needing a multimeter screen.
  • Dual Voltage Support: Compatible with both standard 5V and modern 3.3V logic systems, making it highly versatile for various microcontrollers.
  • Spring-Loaded Precision Probe: Features an elastic tip that ensures stable, non-slip contact with IC pins and solder pads while preventing mechanical damage to the board.
  • Compact & Ergonomic: Measuring just 102mm x 15mm, it handles like a standard pen, preventing hand fatigue during prolonged debugging sessions.
  • Direct DuPont Power: Draws power directly from your target board (VCC/GND) via included DuPont wires, requiring no external batteries.

Full Product Description

Debug Digital Circuits Faster and Smarter

When you are deep into prototyping or troubleshooting a printed circuit board (PCB), constantly shifting your eyes to a multimeter screen breaks your concentration. The 5V/3.3V Digital Logic Test Pen is engineered to streamline your workflow. It provides instant visual feedback right at the probe's tip, allowing you to test logic levels intuitively and efficiently.

 

Intuitive Three-State LED Indicator

No more guessing or interpreting fluctuating numbers. This tester uses a straightforward traffic-light system to indicate circuit states at a glance:

  • Red Light (High Level): Indicates voltage above 2.4V (in 5V mode).
  • Green Light (Low Level): Indicates voltage below 0.6V (in 5V mode).
  • Blue Light (High Impedance): Indicates an open circuit or floating voltage (0.6V - 2.4V), a crucial feature for identifying disconnected pins or faulty traces.

 

Built for Convenience and Precision

Designed with the maker and engineer in mind, this logic probe features an ergonomic, compact PCB body that feels natural in the hand. The built-in elastic (spring-loaded) pogo-pin probe ensures solid electrical contact without slipping or damaging delicate surface-mount components.

 

Plug-and-Play Compatibility

Powered directly via standard DuPont jumper wires, it seamlessly integrates with your existing breadboards, Arduino, Raspberry Pi, or custom development boards. Simply connect it to your board's VCC and GND, and you are ready to diagnose.

Technical Specifications

  • Dimensions: 102 mm (L) × 15.5 mm (W)
  • Operating voltage: 5 V DC or 3.3 V DC
  • Connection type: Standard DuPont wire headers (VCC, GND)
  • 5 V logic thresholds:Low: < 0.6 VHigh: > 2.4 VHigh-Z: 0.6 V – 2.4 V
  • 3.3 V logic thresholds:Low: < 0.39 VHigh: > 1.49 VHigh-Z: 0.39 V – 1.49 V
  • Indicators:Red: HighGreen: LowBlue: High impedance / open circuit

Delivery Options

  • Local delivery within Hong Kong and in-store pickup.​
  • Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.​
  • Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).​
  • Estimated delivery time: 1–3 business days after dispatch (Hong Kong).​
  • In-store pickup details (location and time) will be confirmed by email or phone message.​
  • Delivery times are estimates and may be affected by weather or unforeseen circumstances.​

FAQ Section

Q. Why should I use this instead of a standard multimeter?
A. While multimeters are great for exact voltage readings, they are slow for checking binary logic states. This pen allows you to keep your eyes on the board and instantly see if a pin is HIGH, LOW, or floating, speeding up troubleshooting by up to 10x.

Q. Does this tester require batteries?
A. No. The pen is powered directly from the development board you are testing. Simply connect the included DuPont wires to the VCC and GND pins of your circuit.

Q. Is it safe to use on delicate Raspberry Pi or Arduino boards?
A. Yes! The pen supports both 5V (Arduino standard) and 3.3V (Raspberry Pi/ESP32 standard) logic levels. The elastic probe also ensures you don't apply too much physical pressure to sensitive components.

Target Users / Applications

  • Electronic Engineers: For rapid PCB prototyping and logic gate verification.
  • STEM Students & Educators: A visual, easy-to-understand tool for teaching digital logic concepts.
  • DIY Makers & Hobbyists: Perfect for debugging Arduino, Raspberry Pi, and ESP32 breadboard projects.
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