CentriDrive HDD Centrifuge

Identify HDD Motor Configuration: Delta vs Y

Brushless DC electric motor - Wikipedia

A brushless DC electric motor ( BLDC motor or BL motor), also known as an electronically commutated motor ( ECM or EC motor) or synchronous DC motor, is a synchronous motor using a direct current (DC) electric power supply.

https://en.wikipedia.org/wiki/Brushless_DC_electric_motor

3 Pins

If your motor has 3 pins, it's triangle topology: there is a coil between every pair of pins. This is the easy case: just solder the 3 wires of the ESC (the blue ones) to the 3 pins of the motor (a,b,c on the diagram) and call it a day.

4 Pins

In case there are 4 pins on the motor, you have a star topology. We will need to connect the ESC to points a,b,c on the diagram. To do this, we have to identify to which 3 of the 4 pins they correspond. To achieve this, we'll have to bust out the multimeter and measure the resistance between the pins. As we can see on the picture, 3 combinations give a resistance of 1 Ohm, while 3 others give 2 Ohms. 1 Ohm is the resistance of 1 coil (1 of the Z's on the diagram), while the 2 Ohms is the resistance of 2 coils in series.

Conclusion: the combinations where we measured 2 Ohms are the ones we need (a,b,c on the diagram)!

Hacked Hard-disc Centrifuge

Fast spinning hard drives in a solid aluminium housing are perfect for making small DIY centrifuges... GynePunkFuge Parametrized design by pin&dusjagr in OpenScad: File will be uploaded to thingyverse soon... Adding Font to the 3d object using https://github.com/brodykenrick/text_on_OpenSCAD GaudiFuge First GaudiLabs version of a hard drive centrifuge based on 3D printed tube holder.

https://hackteria.org/wiki/Hacked_Hard-disc_Centrifuge

Developing a Low-Cost Microcentrifuge Using E-Waste

Microcentrifuges are an essential piece of equipment in any biomedical laboratory. However, biomedical equipment like this is generally too expensive for most hobbyists to afford, so I developed this centrifuge to help lower the cost of a proper microcentrifuge. What is a Microcentrifuge?

https://create.arduino.cc/projecthub/kemfic/developing-a-low-cost-microcentrifuge-using-e-waste-04b525

https://www.instructables.com/DIY-Lab-HD-Centrifuge-Arduino-Based

10K RPM CentriDrive Concept and wiring test using drone ESC and servo tester:

CentriDrive Darin Edition

Arduino code and wiring

Simulator

Tinkercad | From mind to design in minutes

Tinkercad is a free, easy-to-use app for 3D design, electronics, and coding.

https://www.tinkercad.com/things/eLPsr1XO9R6-spectacular-gogo-kup/editel?sharecode=TIDGN-1beahcYQfqB2NostK1qouJDcdPJuZU6nBuuQM

Schematic

Real RPM tachometer

DIY Tachometer (RPM Meter)

In this project, I will show you how a 3€ IR distance sensor works and how we can use it to build a proper DIY tachometer that functions properly. Let's get started! Step 1: Watch the Video! Step 2: Order the Components! Step 3: Create the Circuit! Step 4: Upload the Code!

https://create.arduino.cc/projecthub/greatscottlab/diy-tachometer-rpm-meter-6d451a

Centrifuge Eppendorf Tube Holder STLs

Tinkercad | From mind to design in minutes

Tinkercad is a free, easy-to-use app for 3D design, electronics, and coding.

https://www.tinkercad.com/things/f0iECRffWKi-copy-of-8-sample-holder-centrifuge/edit?sharecode=Tsk0OaZzNr_xPMYtG63IfHnuLvim30oaRCfT5AImoDQ

6 sample holder with coupler by Louwrens

Tinkercad | From mind to design in minutes

Tinkercad is a free, easy-to-use app for 3D design, electronics, and coding.

https://www.tinkercad.com/things/dVzQdKx8epT-neat-bojo/edit?sharecode=pPGrAGSlIpBMlDqkdLEYJ-nu-iww4iOARv5P5yJb8Jk

gForce calculator

http://www.endmemo.com/bio/grpm.php

Other References

DremelFuge

DremelFuge is a printable rotor for centrifuging standard microcentrifuge tubes and miniprep columns. Full details at Thingiverse available here. The Dremelfuge is an example of open source rapid prototyping of OSAT project developed by Cathal Garvey in Ireland.

https://www.appropedia.org/DremelFuge

Here are some RCF values (g-forces) to expect when it is used with a standard 1.5ml microcentrifuge tube:

• @3000 rpm - 453 rcf

• @10000 rpm - 5,031 rcf

• @16,680 rpm - 14,000 rcf (The highest on a standard lab centrifuge I use every day!)

• @33,000 rpm - 51,520 rcf (Highest on a Dremel 300)

RT-LAMP Covid Test Kit