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Powerful desktop "bladeless" fan that uses a brushless motorMaker/DIY
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This is a replica of a popular "bladeless" fan that utilizes a unique airfoil-shaped ramp to increase airflow. It uses a 1100KV brushless motor and a 12 V DC PSU.
Materials and methods
- 1 x 1100KV Brushless Motor or similar. I used a Turnigy.
- 1 x standard ESC. The one I used is 20 A.
- 1 x Digispark ATtiny85 or any other Arduino that fits.
- 1 x potentiometer (6 mm shaft diameter) of 1 to 100 KOhm range. I used a 100 KOhm Alpha.
- 1 x female 12 mm 12 V socket.
- 4 x 8 mm round adhesive bumpers.
- 12 x M2 x 6 mm screws (9 of them are countersunk).
- 4 x M3 x 6 mm screws.
- Some small gauge wire.
- Silicone, superglue or similar.
- 12 V DC PSU (2 - 3 A).
You will have to upload the following program to the Digispark ATtiny85 in order to make it work:
- The Digispark ATtiny85 must be powered with 12 V DC (Vin and GND pins).
- The ESC must be powered with 12 V DC too (in parallel).
- The potentiometer outer terminals must be connected to the 5 V DC rail of the Digispark ATtiny85.
- The potentiometer wiper terminal must be connected to P2 of the Digispark ATtiny85.
- The ESC signal input wire must be connected to P0 of the Digispark ATtiny85.
- Connect the three motor phases and swap two if the direction of rotation is wrong.
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