Does this decoy board work with any standard USB charger?

No, this board requires a charger or power bank that specifically supports Power Delivery (PD) or Quick Charge (QC) protocols. If you plug it into an old, standard 5V/1A USB charger, the board will only be able to output 5V, regardless of how you configure it.

Why use a decoy board instead of a standard step-up boost converter?

A decoy board is much more efficient and generates far less heat. Instead of taking 5V and artificially boosting it to 12V (which wastes energy as heat), the decoy board simply "talks" to the smart charger and asks it to natively supply 12V directly from the source.

How do I select the output voltage on this module?

The output voltage is selected by bridging specific solder pads or adjusting the micro-switch on the PCB (depending on the exact batch revision). The board is clearly labeled with 5V, 9V, 12V, and 20V markings to guide your configuration.

Can I bring my DIY cooling project to your store for testing?

Absolutely! We encourage makers to test their setups. You can bring your Peltier modules, fans, and power banks to Sun Cheong Computer Co. Ltd. in Sham Shui Po. Our technical staff will help you wire the decoy board and verify that your charger can handle the required current.

What happens if I set it to 12V but my power bank only supports 9V?

The board features a smart fallback mechanism. If it requests 12V but the power bank's PD profile maxes out at 9V, the decoy board will automatically negotiate for 9V (or 5V) instead of failing completely, keeping your project safely powered.

50mm Type-C PD Decoy Board | 5V-20V DIY Fan Trigger

Name: 50mm Type-C PD Decoy Board | 5V-20V DIY Fan Trigger
Brand: Sun Cheong Computer Company Limited
SKU: 21PS002635
Price: 29.0 HKD
Availability: InStock

Short Product Description

Need to power a 12V cooling fan or Peltier module using a modern Type-C charger? The Type-C PD/QC Decoy Trigger Board is a 50x50mm voltage module cleverly designed as a fan grill. It negotiates with your Power Delivery (PD) or Quick Charge (QC) power bank to output 5V, 9V, 12V, or 20V directly to your DIY electronics. Featuring a smart fallback function, it automatically drops to the next available voltage if your charger lacks the requested power profile. Need technical advice for your custom cooling build? Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) has 20 years of electronic component experience. Visit our Sham Shui Po physical store for instant pickup and expert DIY guidance!

Key Features

PD/QC Protocol Support: Tricks modern Type-C fast chargers into outputting higher voltages for DIY electronics.
Selectable Voltage Output: Easily configure the board to output 5V, 9V, 12V, or 20V based on your project's needs.
Smart Voltage Fallback: Automatically requests the next highest available voltage (e.g., drops to 9V if 12V is unavailable) to ensure continuous operation.
50mm Fan Grill Form Factor: Measures 50x50x2mm, allowing direct mounting onto standard 50mm cooling fans to save space.
Peltier Cooler Compatible: Engineered to handle the power requirements of 12702, 12703, and 12704 thermoelectric cooling modules.
Instant Store Pickup: Don't wait for shipping when you are mid-build; grab your components instantly at our Sham Shui Po location.

Full Product Description

Seamless Type-C Power for DIY Cooling

Powering custom electronics no longer requires bulky, dedicated AC adapters. The Type-C PD/QC Decoy Trigger Board allows you to extract specific voltages directly from standard USB-C fast chargers or power banks. Whether you are building a custom PC cooling loop, a portable mini-fridge, or a STEM robotics project, this module acts as a smart bridge, telling your charger exactly how much power to deliver to your components.

Adjustable Voltage & Smart Fallback

Safety and flexibility are built directly into this module's circuitry. The board supports selectable voltage outputs of 5V, 9V, 12V, and 20V to match your specific component requirements. Furthermore, it features an intelligent fallback mechanism. If you configure the board to request 12V, but your connected power bank only supports a maximum of 9V, the decoy board will automatically step down and request 9V or 5V instead, preventing charger overload and system crashes.

Innovative 50mm Fan Grill Design

Space management is crucial in compact DIY builds. Unlike traditional rectangular PCB modules that dangle loosely, this decoy board is shaped exactly like a 50mm x 50mm fan grill. You can mount it directly onto your 50mm cooling fans or the heatsink of a Peltier thermoelectric cooler (such as the 12702, 12703, or 12704 models). This integrated design saves space, improves airflow, and keeps your wiring incredibly neat.

💡 Pro Tip from Our Technicians

"When using this decoy board to power a Peltier module (like a TEC1-12704), remember that these coolers draw a massive amount of current! Always check the wattage rating of your Type-C power bank or wall charger first. If your charger is only rated for 18W, requesting 12V for a high-amp Peltier will trigger the charger's over-current protection and shut it down. You need a high-power 65W or 100W PD charger for stable cooling. Stuck on your DIY mini-fridge project? Bring your components to our Sham Shui Po store! Our team at Sun Cheong Computer Co. Ltd. loves helping makers debug their power delivery circuits."

Technical Specifications

Product Type: Type-C PD/QC Decoy Trigger Board
Supported Protocols: Power Delivery (PD) & Quick Charge (QC)
Adjustable Output Voltages: 5V, 9V, 12V, 20V
Safety Feature: Automatic downward voltage fallback
Dimensions: 50mm x 50mm x 2mm
Form Factor: Circular fan grill design with standard 50mm mounting holes
Input Interface: USB Type-C Receptacle
Compatible Applications: 12V/20V Cooling Fans, Peltier Modules (12702, 12703, 12704)

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

Does this decoy board work with any standard USB charger?No, this board requires a charger or power bank that specifically supports Power Delivery (PD) or Quick Charge (QC) protocols. If you plug it into an old, standard 5V/1A USB charger, the board will only be able to output 5V, regardless of how you configure it.
Why use a decoy board instead of a standard step-up boost converter?A decoy board is much more efficient and generates far less heat. Instead of taking 5V and artificially boosting it to 12V (which wastes energy as heat), the decoy board simply "talks" to the smart charger and asks it to natively supply 12V directly from the source.
How do I select the output voltage on this module?The output voltage is selected by bridging specific solder pads or adjusting the micro-switch on the PCB (depending on the exact batch revision). The board is clearly labeled with 5V, 9V, 12V, and 20V markings to guide your configuration.
Can I bring my DIY cooling project to your store for testing?Absolutely! We encourage makers to test their setups. You can bring your Peltier modules, fans, and power banks to Sun Cheong Computer Co. Ltd. in Sham Shui Po. Our technical staff will help you wire the decoy board and verify that your charger can handle the required current.
What happens if I set it to 12V but my power bank only supports 9V?The board features a smart fallback mechanism. If it requests 12V but the power bank's PD profile maxes out at 9V, the decoy board will automatically negotiate for 9V (or 5V) instead of failing completely, keeping your project safely powered.

Target Users / Applications

STEM Students & Educators: Building portable, battery-powered mini-fridges or temperature control chambers using Peltier modules for science projects.
PC Modders & Overclockers: Adding auxiliary 12V cooling fans to external GPU enclosures or custom ITX cases powered by a Type-C hub.
DIY Electronics Hobbyists: Creating custom 20V soldering iron stations or portable LED lighting rigs driven by high-capacity PD power banks.

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Type-C PD/QC Decoy Trigger Board | 50mm Fan Grill Voltage Module