Portable Fume Extractor with Flash light

5V - USB compatible
High brightness flash light
High Speed Fan
Compact & Portable
Light in weight
Multipurpose - Soldering, Air blower, Cooler, Lamp etc.,

A Tiny Portable Fume Extractor with Flash LED controlled by 2 latch push switches: This project involves designing a compact and efficient device that can extract fumes and smoke from a designated area. The device is equipped with a flash LED to provide illumination during soldering, rework or inspection. The compact size and simple operation make it ideal for use in small workshops, labs, or hobby areas.

Supplies

Power PCB
LED PCB
12V DC FAN
M3 x 10 mm CSK bolt - 3 Qty
M3 x10 mm Standoff (bolt-socket) - 1 Qty
Brass Inserts M3 - 2 Qty
M3 Hex Nut of 1mm thickness - 1 Qty
White diffuser plastic Sheet (40 x 13 x 1 mm) x 2
Adhesive Rubber Bumper Pads (12.7mm width x 3.6mm thick)
5V USB Charger Brick
3D printed Parts
Body x 1
Cape x 1
Caps x 2
Tools
Scissors
Soldering Iron
Screw Driver
Multimeter

Step 1: Print the Parts

Print config: Medium/High Quality with 100% infill for better results

40mm Customizable Grill Covers:

https://www.thingiverse.com/thing:4837562/files

Step 2: Diffuser Plastic

Cut the diffuser plastic sheet with scissors for 40 x 14 x 1 mm

Step 3: DC FAN

A 12V High speed DC fan is used in the design, commonly these FANs are used in SMPS and server applications
40x28 mm - 2 wire DC fan
DC FAN part number : OD4028-12HB
Similar DC fan with various CFM, RPM and dimensions are compatible with the design (For better results select power less than 6W)

Step 4: Electronics

Two different custom designed PCBs are used in the setup:

Power PCB (USB Input, Control and LED drive)
LED PCB (White LEDs in parallel)

Schematic, BOM and Gerber files of the PCBs

Step 5: Power PCB

Notes:

Verify the orientation of the push button relative to the image reference before assembly, as it is DPDT.
The MEL7135 delivers a constant current of 350mA. The PCB allows for the installation of 2 ICs, depending on the desired brightness and number of LEDs. The number of ICs can be adjusted accordingly.

Step 6: LED PCB

White SMD LED - 4 Qty
Only 4 LEDs have been soldered and one driver IC has been installed.

White LED Part Number: JB5630AWT-P-H40GA0000-NZ000001

Step 7: PCB Test Notes

After PCB assembly,

Before connection of 5V USB, check for short circuit at FAN output and LED output with push button powered ON
Connect 5V USB and measure voltage at FAN output and LED output
FAN output --> 12V
LED output --> 5V
Trim the wires of Fan and LED PCB according to length
Solder the FAN and LED Wires and Power ON for test runs

Warning: Handle with care when the FAN is in operation, it spins at speeds above 8000RPM

Step 8: PCB and 3D Part Assembly

M3 Brass inserts x 3 is installed to the 3D printed BODY
x2 on bottom
x1 on top for PCB
Insert the fan in the socket together with PCB and align it to the top mount hole and USB cutout
Add M3 Standoff to the PCB through the body
Slide the LED Diffuser plastic
Slide the LED PCB

Step 9: Enclosure Assembly

Assemble the CAPE part to the body
Fasten M3 x 10mm bolt to 3 brass insert sockets

Step 10: In Action

Plug the USB cable and power ON to get the fumes out of your way

Incense stick smoke test for demonstration !!

Device is a bit loud due to the high RPM FAN, but works like a charm

Thank you !!

Instagram: @ideazero_

Introduction: Tiny USB Solder Fume Extractor