USB-C PD Trigger Tester – Digital Voltmeter & Ammeter 5V–20V

USB-C PD Fast Charging Trigger Device with Digital Voltmeter & Ammeter

Take full control of your USB Power Delivery setup with this versatile Type-C PD Fast Charging Trigger Charger. Whether you're a DIY electronics enthusiast, a professional tester, or simply want to unlock the full output of your PD charger, this compact device lets you select precise voltage outputs (5V, 9V, 12V, 15V, 20V, and PPS) while displaying real-time voltage and current readings on a crisp digital nixie-tube display. Made in Mainland China.

Key Features

• PD 2.0 & PD 3.0 Protocol Support — Compatible with both PD 2.0 and PD 3.0 charging standards for broad charger compatibility.
• Multiple Voltage Gears — Manually select 5V, 9V, 12V, 15V, or 20V, or use PPS (Programmable Power Supply) step-voltage mode for fine-tuned control.
• PPS Step Voltage Regulation — Adjust output in 20mV, 100mV, or 1V steps for precision power delivery testing.
• Real-Time Digital Display — High-resolution nixie-tube display shows voltage (0.01V resolution) and current readings at a glance.
• Power-Off Memory — Remembers your last selected voltage gear and PD mode so you're always ready to go.
• Auto PD Trigger Mode — "Loop trigger" mode cycles through all supported gears automatically — ideal for batch testing and burn-in testing of PD charger manufacturers.
• Dual-Button Interface (K1 & K2) — Intuitive short-press and long-press controls for switching displays, adjusting voltage, and toggling the auto-trigger function.
• Display Sleep Mode — Long-press K1 for 5 seconds to turn off the nixie tube and indicator lights; any button press wakes the display.
• Phone Charging Monitor Mode — Disable PD auto trigger to monitor the actual charging voltage and current being delivered to a connected device.

Specifications

• Voltage Resolution: 0.01V
• Supported Protocols: PD 2.0, PD 3.0, PPS
• Voltage Output Options: 5V / 9V / 12V / 15V / 20V / PPS
• PPS Step Gears: 20mV, 100mV, 1V
• Display Type: Digital Nixie Tube
• Battery Included: No
• Country of Origin: Made in Mainland China

How to Switch the Display

In the main interface, short-press K1 to cycle through voltage, current, and combined display modes. Long-press K1 for 5 seconds to put the display to sleep; any key wakes it up. Long-press K1 for 10 seconds to toggle the PD auto-trigger function on ("pdon") or off ("PDOF").

How to Adjust the Voltage Gear

1. Short-press K2 to enter the voltage regulation interface — the current gear flashes on the display.
2. Short-press K2 (upshift) or K1 (downshift) to select your desired voltage gear.
3. The display shows the gear number (e.g., "P7-1") followed by the voltage value for that gear.
4. No key press for 5 seconds, or long-press K1 for 2 seconds, to return to the main interface.

Note: The last gear "L" activates loop/sequential trigger mode — all supported gears are triggered in turn. Useful for batch charger testing.

Applications

• Power external devices (routers, optical modems, set-top boxes, laptops) directly from a PD charger at the correct voltage.
• Batch testing and burn-in testing for PD charger manufacturers and electronics labs.
• Verify and monitor the output voltage and current of any USB-C PD charger or power bank.

Package Includes

• 1× USB-C PD Fast Charging Trigger Device
• 1× Screwdriver
• 1× USB Cable

For more information on USB Power Delivery standards and safe electronics practices, visit the U.S. Consumer Product Safety Commission – Electrical Safety.

Frequently Asked Questions

Q: What is a USB-C PD trigger device and what does it do?

A: A USB-C PD (Power Delivery) trigger device communicates with a compatible PD charger using the PD 2.0 or PD 3.0 protocol to request a specific output voltage (e.g., 5V, 9V, 12V, 15V, or 20V). It allows you to use a PD charger as a variable power supply for other electronics, or to test and verify a charger's actual voltage and current output.

Q: Does this device work with all USB-C chargers?

A: This device works with USB-C chargers that support the PD 2.0 or PD 3.0 protocol. If a charger does not support PD, the display will show "----" indicating the protocol is not supported. Standard 5V-only USB chargers without PD will not respond to the trigger function.

Q: Can I use this to charge my phone while monitoring the output?

A: Yes. By disabling the PD auto-trigger function (long-press K1 for 10 seconds until "PDOF" is displayed), the device operates in pass-through monitor mode, showing the real-time voltage and current being delivered to your connected device during charging.

Q: What is PPS mode and how is it different from standard PD voltage gears?

A: PPS (Programmable Power Supply) is an advanced feature within PD 3.0 that allows fine, continuous voltage adjustment within a range — in steps of 20mV, 100mV, or 1V — rather than fixed voltage steps. This gives more precise control over the output voltage for advanced testing or powering sensitive equipment.

Q: Will the device remember my settings if unplugged?

A: Yes. This device features a power-off memory function that stores your last selected voltage gear and PD mode, so it returns to the same settings the next time it is powered on.