DIY Mini Desktop Ultrasonic Mist Cooler

by ahshanhabib2233 in Circuits > Electronics

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DIY Mini Desktop Ultrasonic Mist Cooler

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Introduction

​Beat the summer heat with this compact, eco-friendly, and ultra-portable DIY Mini Desktop Mist Cooler! Powered by a 5V USB interface, this project uses ultrasonic atomization transducers (mist makers) to convert water into a fine cool mist, providing instant relief at your workspace or study table. It’s an easy, low-cost project for makers, students, and hobbyists.

Supplies

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Components and Materials:


  1. ​Ultrasonic Atomization Transducers / Mist Maker Modules (1.5–3 MHz piezo discs) – 2 pcs
  2. ​USB Mist Maker Driver Board (5V DC USB powered)
  3. ​Plastic / PVC Board / Acrylic Box (for water reservoir and housing)
  4. ​5V Mini Cooling Fan (Optional, recommended for better airflow)
  5. ​USB Cable / Type-C Power Source
  6. ​Hot Glue / Waterproof Adhesive / Sealant
  7. ​Connecting Wires


​Tools:

  1. ​Soldering Iron & Solder Wire
  2. ​Hot Glue Gun
  3. ​Wire Stripper
  4. ​Hobby Knife / Cutter

Design and Prepare the Reservoir Box


  1. ​Take a small waterproof plastic container or cut PVC/foam boards to create a customized box (Dimensions approx. 10cm x 10cm x 6cm).
  2. ​On the front wall of the box, mark two circular spots for the ultrasonic mist transducers.
  3. ​Carefully cut or drill holes matching the diameter of the transducers' silicone sealing rings.
  4. ​Ensure the box is leak-proof using waterproof sealant or hot glue along the inside edges.

Install the Ultrasonic Transducers

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  1. ​Insert the ultrasonic piezo transducers into the rubber/silicone sealing rings to prevent water leakage.
  2. ​Push the transducers into the front holes of the box tightly.
  3. ​Apply hot glue around the back edges of the transducers on the inner side of the box to guarantee a 100% waterproof seal.

Wiring and Circuit Assembly


  1. ​Connect the red (positive) and black (negative) wires from each transducer to the output terminals on the USB Mist Maker Driver Board.
  2. ​If using two transducers, connect them according to the driver board's specifications (parallel output).
  3. ​Mount the driver board securely on the side of the box using hot glue, keeping the Micro-USB/Type-C power port accessible from the outside.
  4. ​(Optional) If adding a 5V fan, solder its wires to the 5V power input line so it turns on with the driver board.

Testing and Operation


  1. ​Fill the container with cold water (or add small ice cubes for an extra cooling effect).
  2. ​Make sure the water level touches the back of the mist transducers properly.
  3. ​Plug in a 5V USB cable (from a power bank, adapter, or PC USB port) to the driver board.
  4. ​Press the push-button on the board to start generating cool ultrasonic mist instantly!

Safety and Tips


  1. ​Water Leakage: Always test for leaks before connecting power. Keep electronics (driver board and USB port) dry.
  2. ​Optimal Cooling: Adding ice-cold water enhances the cooling sensation significantly.
  3. ​Cleaning: Regularly clean the water reservoir and transducers with fresh water to prevent mineral buildup.