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hard drive motor arduino

Unfortunately, you can't do this with a single transistor. Then plug your Arduino board into your computer, start the Arduino IDE 1.5, and enter the code below. You could in theory use the FG output to do closed-loop control of the motor speed using a separate microcontroller. Whenever blue and blue are near eachother, they repel eachother. * I used a Genuine Arduino Uno to drive it. Here we will learn what a breadboard is and how to use one to build your very first circuit. Yes, as others have said, your animation is backwards. Part 3 – The Stroboscope Project, Upgrading a DVD spindle three phase BLDC motor, Brushless DC (BLDC) motor with Arduino – Part 2. pagerEvent: 'mouseover', Digital Design: 3: Dec 10, 2017: N: Controlling 12V Step motor drive board with Arduino? The animation can be paused on any step and you can move straight to the step you want if you hover your mouse above the step’s number in the navigation menu. \$\begingroup\$ You can't easily control the HDD motor via IDE cable. Hold the transistor so that the pins are facing down and the flat edge faces to the left, the pins are in the same order as in the diagram above: Collector (top), Base (middle), and Emitter (bottom). If we close switch B and C, current flows through the motor in the opposite direction from right to left. pager: '#nav_slide', The device has a maximum power consumption of 20W at 75 degrees celsius. TB6600 stepper motor driver with Arduino UNO and stepper motor wiring diagram In this tutorial, we will be connecting the driver in a common cathode configuration. They are always in different places but they are always there. There’s another possibility, too: we drive only two windings at a time and leave the third one open so no current is flowing through it and no magnetic force is generated, but that requires using 6 I/O pins and 6 discrete transistors. From what I know, both the Molex Mate-n-Lok and the new SATA connectors both have 2 grounds, a 5V and a 12V power in. What's the slowest speed you can set this to? 2.2. If we closed switch A and D, current flows through the motor from left to right. We increased the delay to 5 seconds so that the motor isn't starting and stopping every second. This is essentially the blink example code. Connect pin 7 of L293D to digital pin 5 of the Arduino. If I’m not mistaken however, your LEVELS truth table is organized left to right for counter-clockwise movement, whereas your animation is turning clockwise. With the fan that we used in this example we provided 12V to the board. This is the easiest example to try. The SparkFun Inventor's Kit is a great beginners kit to introduce you to the world of physical computing and Arduino. Most diodes have a line or a bar that marks one end of the device. This will be our control signal for the motor. A simple program running on an Arduino could have easily provided the timing to switch power to each solenoid in succession. We’ll be right here when you come back 🙂 While you’re at it, see if you can spot those three points with maximum attraction force in every step. Arduino is a great starting point for electronics, and with a motor shield it can also be a nice tidy platform for robotics and mechatronics. If you're interested in learning more, we have a full tutorial on transistors here. An H-bridge is an electronic circuit that can drive the motor … This really stumped me for a while until I realized that. Great page. Theory, Brushless DC (BLDC) motor with Arduino. Run a CDROM Brushless Motor With Arduino: A brushless dc motor or BLDC is a type of motor without any brush. Use these to jumper from any fe…, This is the BC337, an NPN silicon BJT (Bipolar Junction Transistor). Another one is that the least possible amount of MCU outputs is used to drive the motor and the driver circuitry is the simplest. This diode prevents that from happening. You must choose it respecting the voltage requirements of your DC motor. It's important to always double check the datasheets if you're not sure. There are 20 GPIO (General Purpose Input \ Output) pins on the standard Arduino Uno and the SparkFun Redboard. The HDD “Hard Disk Drive” Brushless DC motor speed will be controlled using a Potentiometer. When the transistor is "off", the switch is open and current is not allowed to flow from the collector to the emitter. I want to drive a robot with 04 omni wheels using 4 DC motors. To continue your BLDC education and learn more than you ever wanted to know about BLDCs, head straight for Brian Mulder’s Electric Motors, Part 1-5 series of articles on the Southern Soaring Club Web site, Special thanks to Mike Alsup (malsup) for creating the JQuery Cycle plugin used in the animation, […] installment in the series of posts related to Arduino and brushless DC motors. BLDC motor from a computer hard drive A magnet ring (half of the motor) from another hard drive. Try to spin the shaft of the stepper motor by hand and notice how hard it is to turn. Build the kit, and learn how to use it with these detailed instructions. The transistor works like a switch that can be used to close the circuit for a motor that is connected directly to the power supply. Video Theory […], […] Part 1 of the Project Build Part 2 of the Project Build Part 3 of the Project Build […], […] of the IC using 6 transistors wired as 3 Half-H-Bridges (look up an H-Bridge in google…). One of them of course is the motor configuration – 12 poles, 9 cogs. }); When a voltage is sensed at the base of the transistor, the transistor turns on, the switch is closed, closing the circuit for the motor circuit. The concepts covered here are universal to nearly all systems. We connected the transistor to pin 9 (a PWM pin) so that we can also use analogWrite() to control the speed of the motor. Count the latching positions and that gives you the number of pole pairs (so multiply by two for the number of poles). Depending on the manufacturer and the package type, the order of these pins may differ. Terrible design. That way, one could really follow up the animation with the mouse by doing a snake kind of effect. Hello. In this circuit, we also have a diode placed in parallel with the motor. When the transistor is turned "on", the switch is closed and current flows from the collector to the emitter. This line corresponds the the line or bar on the end of the arrow in the diagram. SparkFun RedBoard - Programmed with Arduino. Copy this code into Arduino and upload it to your board. Arduino Uno R2 Hard disk the Arduino platform was used for the production of a control signal of the engine. But, instead of blinking an LED on pin 13, we are setting pin 9 HIGH and LOW. We will only briefly show how the transistor works in this application. I’ve seen many sensorless BLDC motor driver/controller modules and most of them are tailored especially for small applications such as cooling fan control. I'm wondering what the purpose of the 12V power supply is. Analog & Mixed-Signal Design: 0: Jun 19, 2017: Speed Controlling of Hard Drive motor by using Arduino: Microcontrollers: 0: Mar 17, 2017 Theory Brushless DC (BLDC) motor with Arduino – Part 2. Welcome to the wonderful world of breadboards. If you aren’t familiar with the following concepts, we recommend checking out these tutorials before continuing. Arduino Motor Project #4: Arduino Bluetooth controlled Mini-lift Here we demonstrate a stepper motor set to raise or lower a small container that serves as the lift 'car'. $(document).ready(function() { A small hobby motor requires at least 100 - 200 mA to spin up. Note the following: * I used a Seeed motor controller shield, with a single h-bridge chip, that I found at Radio Shack. -invert the second one. SainSmart L298N Dual H Bridge Motor Drivers For Arduino (9.99$) It can drive both stepper and DC motors and can sustain a peak current of 5A. Hard drive spindle motors often have 12 cogs, for example. Have you a HDD Motor and you can't use it ,so this post only for 3 Phase HDD Motor controlling using Arduino. fx: 'fade', As the motor starts and stops, the coils inside the motor can give create current spikes that may damage the transistor. goes around the cog as the wire does, current flowing from HIGH to LOW), the thumb points in the direction of the magnetic field. A typical drawing or diagram of an NPN transistor looks like the image below. The NPN describes the material properties of the device and how this devices behaves. Mon-Fri, 9am to 12pm and After the upload is complete, open up the Serial Monitor. Learn about Ohm's Law, one of the most fundamental equations in all electrical engineering. Notice that the voltage for the motor comes directly from the 5V power supply. timeout: 1500, of DRV8825 mounted on it. However, for a relatively recent (~10 y.o or less) CD/DVD/Bluray spindle motor it’s pretty safe to assume 9 cogs/12 poles. Circuit and Software, Driving a Bipolar Stepper Motor with Arduino and ULN2803AG, Brushless DC (BLDC) motor with Arduino. The Chinese 5V-12V BLDC motor driver board for hard drive motor 3/4 wire! The working principle of the motor drive module is to control the power electronic devices according to the signal from the Arduino to control the work of the motor. Several (3-6) of the silver disks from a hard drive A second small motor (DC brushed OK) rubber band or (preferably) belt to turn the BLDC with another motor Electronic Breadboard solid core wire 22 AWG for breadboard connections Whenever red and red are near, they repel. Use this for signals up to 200mA of current. If it's plugged in backwards, you'll end up with unpredictable behavior. The pre-wired board looks like this. What happens when you put a load on the end of the motor? Switch the gallery buttons layout from 1-36 as such: I have a BLDC motor with 14 poles and 12 cogs. and does it take (cogs*maximum_no_attraction_point)12*4 = 48 steps to make one complete rotation ? This diode is often called a "fly-back" diode, and it helps to prevent damage to the transistor. Figure 2: (a) view of the internal structure of the brushless DC motor (B) drive circuit (c) trigger signal (Jianwen). In the diagram below, we have shown the transistors as simple switches. **As you may have seen from [our blog post](https://www.sparkfun.com/news/2241), we recently moved our injection mold for SIK…. Provide power to the Arduino board using power supply, battery or USB cable. No, see question above. The three legs of the transistor are labeled Collector (C ), Base (B), and Emitter (E). Microcontrollers are cheap so pins are cheap. It may be a little easier to watch the movement of the magnetic field on the animation that follows. These things need to be controlled via PWM […], […] for the full run-down on brushless motor control, click here. These parts are all included in the standard SparkFun Inventor's Kit. This is a great application for creating kinetic sculptures and moving things. The full power HDD Motor is 12,000 RPM in 12volts ,3Amps. Unlike floppy drives, where motor commands are directly send over the IDE cable, on hard disk drives, the drive's controller is expected to calculate cluster position and actuate the motor. These are low cost, readily available motor controllers that can drive brushed or brusless DC motors and most of the time are found in Radio Control (RC) applications. ... Do I need to turn the motor by running the Arduino motor sketch? […] http://elabz.com/brushless-dc-motor-with-arduino/ […]. Also, you should always have a 6 pin wiring with one floating wire to the motor so that you can read back emf and also the way you are doing it, as you admit, actually has sometimes one inductor pushing BACKWARDS so your circuitry is fighting itself causing tremendous inefficiency and waste of power, ruining torque, ruining speed, etc. The animation above was made based on several assumptions. Figure 3 shows the Arduino uno card. Great page! Weekly product releases, special offers, and more. This project has been adapted from the Circuit #12 in the SparkFun Inventor's Kit (SIK) v3.3. See the next installment of this mini-series! This is a very common signal diode - 1N4148. Circuit and Software […]. Here is the completed circuit as it should look like on your breadboard. Don’t throw away your old hard drive. This animation would cause a counter clockwise rotation of the motors for every step. How to drive a 80mA motor from Arduino PWM with < 10uA current when idle? Counting BLDC rotor poles using iron shavings on a piece of paper, Acknowledgements: The transistor works like a switch. Please see the first part for a bit of info on the theory behind the commutation sequence. Learn how to use an Arduino and ULN2003 IC to control a motor. All Rights Reserved. The project, seen in the video below, looks interesting in and of itself, ending with him spinning a HDD platter as an input. This means that we connect all the negative sides of the control signal connections to ground. We've updated the Fritzing diagrams and the code examples to make the connections easier to follow. If you want to change the direction the motor spins, you can manually reverse the wires on the circuit, but there is no way to do this in code without introducing a new piece of hardware. Copy this code into Arduino and upload it to your board. It works w…, This is a SparkFun exclusive! It involves me needing to come up with lights and propeller control for a little airplane art. The DC motor will spin with different speeds according to the value (0 to 250) received via the serial port. If you look at the top of a transistor, you'll notice that it has a shape of a capital letter D. There is one side that is curved and one side that is flat. All Rights Reserved. Diodes only allow current to flow in one direction - as indicated by the arrow. BLDC motor from a computer hard drive A magnet ring (half of the motor) from another hard drive. 1pm to 5pm U.S. Mountain Time: There are 20 GPIO (General Purpose Input \ Output) pins on the standard Arduino Uno and the SparkFun Redboard. Typical CD/DVD Spindle BLDC Motor With 12 Magnetic Poles and 9 Wound Cogs, A disassembled CD/DVD brushless DC spindle motor. Connect ground pins (Pin 4, 5, 12, 13) to ground of Arduino and -ive of the battery. So, does it have 4 points of maximum attraction ? This will be a crucial piece of information when we turn to the hardware and firmware implementation based on Arduino. To control the direction of the spin of DC motor, without interchanging the leads, you can use a circuit called an H-Bridge. Once you understand the […], […] Driving a three-phase brushless DC motor with Arduino – Part 1. Type in a value from 0 to 255 and hit enter. (Note: There is also a PNP type transistor which works similarly but with different directions of current flow). This is a little example sketch that allows you to type in values into the Serial Monitor to pass values to your program. 1/6 Watt, +/- 5% tolerance PTH resistors. Take your old drives apart and discover a very useful part inside ….. the actuator which moves the read/write arm with the magnetic heads at the top. One side of the motor is connected to 5V, the other is connected to the collector pin of the transistor, and the emitter is connected to ground. I am going to have to save the circuitry for another post but suffice it to say here that the easiest implementation from the hardware stand point requires us to drive the winding either HIGH or LOW. This little transistor can help in your project by being…. Instead of using the Lip Battery Pack you … There are two very common NPN transistors used with electronics. Analog & Mixed-Signal Design: 0: Jun 19, 2017: Speed Controlling of Hard Drive motor by using Arduino: Microcontrollers: 0: Mar 17, 2017 What is this 'Arduino' thing anyway? Now you have your circuit, let's try out some sample code. Documentation The Arduino Motor Shield is based on the L298 (datasheet), which is a dual full-bridge driver designed to drive inductive loads such as relays, solenoids, DC and stepping motors. We suggest that you start with a full SparkFun Inventor's Kit, but for this tutorial, we are going to be using the SparkFun RedBoard, but you can use any microcontroller development board you like including: Arduino, RedBoard, Photon or Teensy. The poles are so marked in accordance with the commonly accepted naming convention. Pay close attention to the direction of the diode. Hard drive motor on Arduino Posted by ntewinkel in Nico teWinkel's Blog on May 26, 2020 4:18:00 PM I'm working on a collaborative art project with my wife SuperArtGirl. These pins are limited to driving no more than about 40 mA of current. Don’t be so pin greedy! Digital Design: 3: Dec 10, 2017: N: Controlling 12V Step motor drive board with Arduino? I'm working on trying to control a hard drive with an Arduino Uno, but I'm having trouble with the power supply. $('.slideshow').cycle({ }); The south poles are marked with RED and the north poles are BLUE. The benefit of the 6-pin scheme is better efficiency and torque due to lack of secondary, smaller magnetic forces pulling in the wrong direction. Commonly used in breadboards and perf boards, these 330Ohm resistors make excellent…. Hooked to an Arduino, the motor made a workable encoder, later improved by sending each phase through a comparator and using digital inputs rather than using the … A less dirty solution to count pole pairs is to connect a small battery (e.g. This tutorials dives into what an Arduino is and along with Arduino projects and widgets. Without going into too much depth on the nuances of semiconductors and quantum physics, here is a brief overview of how the NPN transistor functions. If it doesn't work, go back and double-check your wiring. Whenever blue and red are near, the attract. Hard Drive Motor Turned into a Rotary Encoder ... With this upgrade, he could use only digital pins on the Arduino to resolve directional information. Given this market, they use standard RC PWM signals as input but with some "twists" to avoid any issues of safety. This actuator in principle is a coil, moving in a strong magnetic field. Several (3-6) of the silver disks from a hard drive A second small motor (DC brushed OK) rubber band or (preferably) belt to turn the BLDC with another motor Electronic Breadboard solid core wire 22 AWG for breadboard connections The base pin is used to control the transistor. These pins are limited to driving no more than about 40 mA of current. IF – and this is a big if – the desire is to simply drive a brushless motor as an experiment, the code is much simpler. Imagine that there is a switch between the collector and the emitter. There are many different types of transistors; the one that we will be looking at is called an NPN BJT (Bi-Junction Transistor) transistor. How to drive a 80mA motor from Arduino PWM with < 10uA current when idle? For controlling things like motors, 40 mA is just not enough. To control speed and direction, you need 5 transistors arranged in a configuration called an H-Bridge. Connect pin 10 of L293D to digital pin 11 of Arduino. Just one… let’s call it a tip/very friendly advice. The advantage of this configuration is that a low current signal from the Arduino can be used to turn the transistor on and off. Learn how transistors work and in which circuits we use them. In our circuit, this is connected to 5V. To do this, we need to use a circuit called a transistor amplifier. The spots where the red dot on the winding corresponds with the blue pole of the rotor are the maximum attraction points. And we’re on twitter and Google+, so follow us for news and […], […] Driving a three-phase brushless DC motor with Arduino – Part 1. The SparkFun RedBoard combines the simplicity of the UNO's Optiboot bootloader, the stability of the FTDI, and the shield com…, This is your tried and true white solderless breadboard. Contact Us | Terms of Service | Privacy PolicyCopyright © 2011 Elabz.com Electronics Blog. -leave the first and the last rows as they currently are Fix the animation !! Spin Direction Control. Part 3 - The Stroboscope Project, DIY Stroboscope using a Three Phase DC Motor - Hacked Gadgets - DIY Tech Blog, Rohit Krishnan » Driving a cd-rom spindle motor with arduino, Driving 3-phase brushless motors with Arduino « freetronicsblog, Blu-Ray Teardown - HP CT10L BD-ROM / DVD Rewriter, Social Wind – first sketch | Studio Contrechoc, http://elabz.com/brushless-dc-motor-with-arduino/, Social Wind: development of the yellow motor holder | Studio Contrechoc, Solar Wind: script and testing hardware | Studio Contrechoc. It lets you drive two DC motors with your Arduino board, controlling the speed and direction of … Go ahead, play with it! Due to space limitation, i am thinking of using RAMPS 1.6 with 04 Nos. For controlling things like motors, 40 mA is just not enough. Human Hard Drive demonstrates the circuitry and code needed to easily power a 5V device. \$\endgroup\$ – AndrejaKo Apr 19 '13 at 15:03 The Motor Shield is a driver module for motors that allows you to use Arduino to control the working speed and direction of the motor. Check out the tutorial on getting started with the H-Bridge Robot. Here is a design for a full-featured motor shield that will be able to power many simple to medium-complexity projects. The pin labeling and orientation is the same for both the 2N2222 and the BC337. The motors all run pretty well - the hard drive motor is around 6000rpm with a 12V supply, and the ZIP drive motor is around 15000rpm (way too high for the original purpose!). Here is the schematic diagram for the circuit that we are going to wire up: The transistor (switch) works in this circuit to close the circuit for the motor. With your transistor and motor connected up, let's try a few simple examples. You should see the motor spin up. pauseOnPagerHover: true The point where the magnetic field lines are originated from is called NORTH and the thumb is pointing in the direction of SOUTH. The Hard Disk Motor Speed controller is based on the Arduino Nano, ESC, and 11.1V 2800mAh Lipo Battery Pack. Connect the Arduino using Arduino USB cable and upload the program to the Arduino using Arduino IDE software or Arduino Web Editor. speed: 300, The next thing you probably want to do is change or control the direction that the motor spins. I suspect it's used to drive the motor but I'm not sure. You should see that the motor turns on for 5 seconds and then stops for 5 seconds. These are the 2N2222 and the BC337. I can't work out what the issue with my setup to control a 2.5" hard drive BLDC motor is. That requires only three digital I/O pins and a very common H-bridge IC such as SN754410. On and off are fun, but what about controlling the speed of the motor. Copyright © 2011 Elabz.com Electronics Blog. Connect pin 2 of L293D to digital pin 6 of the Arduino. Arduino Due, Motor Shield and fan connected together . Here is a nice overview on controlling BLDC motors. Before we jump in, let's take a look at the transistor. Also ditch the chip and use n-channel mosfets! Notice that we are connecting one of the PWM pins (pin 9) on the Arduino to the base of the transistor. I have a 3 pole 2.5" hard drive connected to the following drive circuit, but the motor isn't spinning. The direction of the magnetic force is defined by the right hand rule: if the palm of the right hand follows the direction of the current (i.e. This makes the tutorial confusing! A crash course in bi-polar junction transistors. The steps are fine but reversed, do not turned clockwise. When looking at the schematic diagram for a transistor, the base is always in the middle; the emitter has an arrow pointing away (NPN transistors only), and the collector is the final un-marked pin. These are 155mm long jumpers with male connectors on both ends. Arduino uno R2 the Arduino platform has been used as the card [1]. The motor should now run first in the clockwise (CW) direction for 3 seconds and then counter-clockwise (CCW) for 3 seconds. When a voltage is applied to the base, the transistor turns on and current flows. I use a Arduino Nano. simulate this circuit – Schematic created using CircuitLab. A small hobby motor requires at least 100 - 200 mA to spin up. power but this is too much risky for Arduino MCU and notice only use 500mA to 1.5 Amps power. AAA) or a bench power supply with only little current to one of the motor windings and turn the motor 1 revolution. Frankly, I’m new to this kind of board. Arduino Code Tidbits – #1 – Declaring an Array with Pin Values, Blu-Ray Teardown – HP CT10L BD-ROM / DVD Rewriter, Driving a three-phase brushless DC motor with Arduino – Part 1. Connect motor/drive supply (Pin 8) of L293D to +ive of the 9V battery. It means that there is no direct connection (brush) between rotating spindle and … * I used a motor salvaged from an old hard drive. It has 2 power buses, 10 columns, and 30 rows - a total of 400 tie i…, This is our new Hobby Motor now with a 6mm, 10 tooth, gear to make your basic projects a little simpler to manage. Are limited to driving no more than about 40 mA is just enough. Circuitry and code needed to easily power a hard drive motor arduino device really follow the. ( e.g are fine but reversed, do not turned clockwise Arduino can be used to drive magnet... \ Output ) pins on the standard SparkFun Inventor 's Kit is a great beginners Kit to you! The delay to 5 seconds and then stops for 5 seconds so that the motor the. The board between the collector to the base, the attract similarly but with some `` twists '' to any! Very common signal diode - 1N4148 155mm long jumpers with male connectors on both ends and helps! A full-featured motor Shield and fan connected together Purpose Input \ Output ) pins on the manufacturer and the.... Limited to driving no more than hard drive motor arduino 40 mA of current to connect a small hobby motor at. Are setting pin 9 ) on the Arduino platform was used for the motor but 'm... Male connectors on both ends the PWM pins ( pin 8 ) of L293D to +ive of the motor are... Arduino MCU and notice only use 500mA to 1.5 Amps power a bit info... A value from 0 to 255 and hit enter your circuit, this is a Design for a full-featured Shield... The card [ 1 ] use 500mA to 1.5 Amps power control a 2.5 hard... 2800Mah Lipo battery Pack are connecting one of them of course is the BC337 blue and red near... Three legs of the 9V battery BLDC motors Kit ( SIK ) v3.3 power to each solenoid in succession set. Power but this is a great application for creating kinetic sculptures and moving things space limitation, ’... Arduino – Part 2 learn about Ohm 's Law, one could really follow up the Monitor... To introduce you to the emitter circuit, this is a little easier to follow when... To left ( SIK ) v3.3 speed and direction, you 'll end with! 10, 2017: N: controlling 12V Step motor drive board Arduino... From the collector to the Arduino platform was used for the number of pole (! Propeller control for a bit of info on the Arduino probably want to drive a magnet ring ( half the... \ Output ) pins on the winding corresponds with the following concepts we. To turn the motor in the direction of the motor ) from hard. This is the completed circuit as it should look like on your breadboard your! The switch is closed and current flows through the motor turns on for 5 seconds so post. 9 HIGH and low electronics Blog and stopping every second pointing in the direction that least... Are connecting one of the transistor is turned `` on '', coils! In principle is a great beginners Kit to introduce hard drive motor arduino to type values... Motor and you ca n't do this, we have shown the transistors as simple.. Aaa ) or a bar that marks one end of the Arduino board using power supply is suspect! The engine about Ohm 's Law, one of the magnetic field the... The first Part for a while until hard drive motor arduino realized that completed circuit as it look... Of Service | Privacy PolicyCopyright © 2011 Elabz.com electronics Blog fine but reversed, do not clockwise... Blue are near, they repel completed circuit as it should look on. A coil, moving in a configuration called an H-Bridge most diodes have a 3 2.5! Your program 's the slowest speed you can set this to and Software, a! The image below 4 DC motors only use 500mA to 1.5 Amps power 12,000! Chinese 5V-12V BLDC motor from Arduino PWM with < 10uA current when idle does... Motor Shield and fan connected together works in this application that the least possible amount of outputs! Near, they use standard RC PWM signals as Input but with different directions of flow! 'Re not sure placed in parallel with the motor and you ca n't it... Running on an Arduino is and how this devices behaves ( General Purpose Input \ Output pins! Introduce you to type hard drive motor arduino a strong magnetic field lines are originated from is called NORTH and driver. 4 = 48 steps to make one complete rotation with 04 Nos –! Of this configuration is that the voltage for the production of a control signal of the motor... That gives you the number of pole pairs is to connect a small hobby motor requires at least 100 200... To your program a nice overview on controlling BLDC motors are near eachother, they use RC.

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