In this example I have the PWM pin connected to Arduino pin D3, and ground to ground. that is pre-made and can manually control (with a knob) the speed of the This will enable the throttle selection drop-down menu. For help interpreting the error flags, check out the Alltrax Toolkit Manual. As long as the circuit's current is kept below the motor controller's top rating, you should never have to worry about frying your control electronics. Now is time to make all of the connections from the controller circuit to the Arduino and Alltrax motor controller. Eagle library that includes a footprint for a 5A fuse, and one suitable This would be a problem because the voltage converter needs to be on in order to power the Arduino which is used for activating the contactor. Also note that there is a 20A fuse on this board. The next order of business is to connect a microcontroller to the motor controller board. However, should you be Connecting the board to an Arduino to get it to spin in one direction is rather simple. Speed of a brushless dc motor can be controlled by controlling the input dc voltage / current. Vary electrical flow to control speed, volume, and light intensity. This can be found under the "Throttle Settings" tab under the main screen. Wiring up a wheelchair motor to a DC speed controller is a little bit different because of the electronic brake attached to the back of the motor. This makes it suited for heavy duty applications. The second necessary component is a high current 250 ohm 10W pre-charge resistor connected across the high current contacts. Maintain speed automatically. range of power ratings. Therefore, it should not be surprising that we need to plug a servo extension cable into the Channel 1 header pin inputs (labeled "Ch1"), with the black, red and white wires lining up appropriately ("WRB" - as labeled). The arrangement of this system is as shown in the figure at right. Another thing that you should do before powering up your circuit and testing your throttle is to lower the motor's maximum speed by adjusting the Max Forward Motor Speed dial and setting it around 30%. This circuit board can control motors with a power supply of up to 24V and handle currents up to 10A continuous and brief surge current up to 12A. Units help operate universal, shaded pole, and PSC 1-phase AC motors used to run fans, blowers, pumps, vibratory feeders, and heating and lighting applications. Flux Control Method. In the same way, a long-life design is possible because a large aluminum electrolytic capacitor is … The … Following are the various methods of speed control of induction motor achieved from Rotor side: Cascade Operation of Induction Motor: This method is also called the tandem control and obsolete now. You’re seeing this ad based on the product’s relevance to your search query. KB Electronics Solid State Variable Speed Motor Control 6 Max amps 115 Volts. If we had an additional motor, we could also connect it to "Motor 2.". This armature control method is based on the fact that by varying the voltage across the required voltage. However, when you begin controlling motors of 100A or greater, these boards are typically only designed to control speed, and not reverse direction, such as the Alltrax 48300 controller. NEMA rated, these switches are protected from debris and washdowns. However, you shouldn't plan on running a motor with a 10A stall current off of this board. If we add resistance in series with the armature, the armature current (Ia) decreases and hence speed decreases. This software requires a PC running either Windows 8 or 10. Using hookup wire, the white wire from the servo extension cable should should then be connected to Digital Pin 9, and the black wire with the Arduino's ground pin. Adjustable AC speed controls from Grainger can operate on 60/50 Hz at plus or minus 10% rated line voltage. The direction pin receives either a high or low signal, and this controls the direction of rotation (more on this in the Reversing a Motor Lesson). Download. Add Tip Ask Question Comment Download. In simpler language, your main contactor will not be able to turn off, and power to your motor will be stuck turned on. Both of the fuse values were determined based on the datasheet, but 5A in particular is important because the solenoid drive pin has a 5A (peak) limit. We are going to start by configuring a 0-5K Ohm throttle, which is the most common type that you might encounter. Use a knife and cut the wire that connects the motor to the power source. This controller board can be controlled like a servo motor. Miniature electronic speed controls are used in electrically powered radio controlled models. Above you will see the complete circuit for controlling a motor using a 0-5K Ohm electromechanical throttle. In this example, we will be using an SPST on/off toggle switch, but you could use an actual key switch (more on that in the Further Considerations lesson). January 8, 2019 May 18, 2016 by admin. The last order of business is to connect the throttle. The code to get it to move at different speeds is just as straightforward as you can see below: The Alltrax 48300 motor speed controller is designed for really large motors, and have a continuous current rating of 210A and a momentary maximum current rating of 350A (for sudden current spikes). This is the green terminal with the set screw helpfully labeled "Motor 1." To control the motor simply turn the knob. There is no reason for allowing a current over 5A into the control circuitry. A 24V to 12V converter and barrel plug is also necessary because the Arduino requires a voltage of greater than 7V to be applied at its power jack. By the end of this lesson you should be more than confident to power up a brushed DC motor of nearly any (reasonably sane) size and control its speed, with or without an Arduino board. Again, if you are using a larger contactor than the one shown, check the datasheet for the appropriate size pre-charge resistor. It also helps to attach ring terminals to the 24V side of the converter. While we are at it, we may as well return to the main "Controller Settings" tab and configure the remainder of the motor controller settings. Select the throttle drop-down menu. Designing and manufacturing a PCB is not necessary. In case it was not clear, VIN stands for voltage-in. The connections to the Alltrax controller are the same as you would make for a KSI switch and 0-5V throttle.To see it in action, upload the following code: This code is about as simple as Arduino code gets. Motor_Speed_control_PWM.ino. As you probably have noticed, this circuit is operating primarily at 24V. This resistor allows voltage to bypass the contactor and charge the very large capacitors within the motor controller. Being able to quickly and visually identify a blown fuse will save you a lot of headaches and guesswork. However, the relay coil requires a little bit more current than the Arduino pins can provide, so it is being triggered with a TIP120 transistor. To control the motors, we need to connect the motor to the 10A motor 1 terminal. Make Offer - 4000W SCR Voltage Regulator Dimmer Motor Speed Control W/Fan AC110V to 220V. Induction motor speed control from stator side 1. However, before this throttle will work with the motor controller, the throttle-type needs to be reconfigured in the Alltrax Toolkit software. that they are typically unable to reverse the motor direction, and not The PWM pin receives a PWM signal from your microcontroller and this simply controls the speed of the motor. The easiest way to control a relatively low current 12-24V motor is by using a generic analog DC motor speed controller. $16.95. 5 out of 5 stars (3) 3 product ratings - KB Electronics Solid State Variable Speed Motor Control 6 Max amps 115 Volts. This is taking the place of the KSI switch.When pin 2 is high, Digital Pin 3 can be used to make a PWM signal which controls the throttle voltage (0 being off, and 255 being full throttle). For this interface circuit interface you will need the following materials:(x1) SPST Relay(x1) TIP120 transistor(x1) 1N4004 diode(x1) 1K resistors(x1) 5A / 58VDC fuse(x1) Fuse holder(x4) 2-pin 3.5mm terminal block. So by changing the supply frequency, the number of stator poles and slip we can change the speed of … However, this type of controller is typically best for The speed of a three phase induction motor is given by, N = N s (1-s) and N s = 120f/P This shows the speed of three phase induction motor depends upon synchronous speed (N s) and slip(s).The synchronous speed of induction motor depends upon supply frequency and the number of stator poles. Speed control of dc shunt motor can be easily achieved but in the case of the induction motor, it is difficult to achieve smooth speed control. When supply voltage (V) and armature resistance Ra are kept constant, the Speed is directly proportional to armature current (Ia). All models feature single-phase AC input and fully variable AC output. After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. "Those being: 0-5VA 0-5V throttle input controls the motor speed by using a voltage from 0 up to 5V. This is a special type of circuit that allows you to reverse the voltage polarity of a motor's power supply. The speed of a motor can be controlled by controlling the output voltage of generator G. The filed regulator is connected across the generator with a DC supply line to control the filed excitation. A throttle is a mechanical input which controls the speed of the motor, such as a foot pedal. The positive terminal of the battery bank, should be wired in series between the 250A fuse and the main contactor. If this happens, there is a chance you will overwhelm and eventually fry the motor controller and release its magic smoke!If you keep the electronic brake installed, it is important to connect the brake wires directly to the battery terminals. This is the terminal that the fuse cable is connected to. These types of controllers are typically used in electric vehicles which use external circuitry to reverse motor direction. The higher the voltage more is the speed. Free shipping. The switch must be turned on before the motor's speed is adjusted using the controller. Even if you want to reverse the motor, as you will see in the next lesson, all of this gets only a little bit more complicated. To begin, let's make all of the high current connections in the circuit. In this method, the magnetic flux due to the field windings is varied in order to … When the coil is not energized, the switch is reversed and no electricity can flow. Control the speed of low-voltage permanent-magnet DC motors. This input typically uses a mechanical input which turns a potentiometer to change the resistance. The throttle's green wire should be connected to the J5 terminal on the motor controller. Therefore, before we can attach a throttle, we need to first configure the software on the motor controller for the throttle we are using. Additionally, many AC controls have a single phase input so this allows you to run 3 phase motors in facilities that don’t have 3 phase power available. The concept of speed regulation is different from the speed control. This is different to speed regulation – where the speed is trying to be maintained (or ‘regulated’) against the natural change in speed due to a change in the load on the shaft. in one direction. These controllers are typically meant for golf carts, but can be used to build a host of different kinds of electric vehicles. Different speed control methods of induction motor are explained below. Speed Control of BLDC Motor. Stepper Motors offer high torque and smooth low speed operation. Once done, be sure to save the changes by pressing the "Set" button on the left-hand side. The final circuit should look something like the circuit pictured above.Before you fire it up, you may want to consider somehow clamping your motor down to your workbench. The yellow wire from the voltage converter should go the red input wire on the throttle. If you power the motor without releasing the brake, you will stall the motor (keep it from spinning) and force the wheelchair motor to draw its maximum current. When an electromagnet within the main contactor is energized, a solenoid inside of it toggles a switch which allows high current DC electricity to flow to the motor. All of this data can even be recorded into timed log files for later review. In the armature control method, the speed of the DC motor is directly proportional to the back emf (Eb) and Eb = V- IaRa. As you will notice, with this type of controller, your motor will only ever rotate in one direction. About: My name is Randy and I am a Community Manager in these here parts. The enclosed version comes with a rugged housing, power on/off switch, power on indicator lamp, front access fuse, as well as convenient input and output cords and plugs. A servo extension cable is then used for controlling the board via Arduino. removing an electric brake from a wheelchair motor, Parallax DHB-10 Dual H-Bridge 10 Amp Motor Controller, Cytron 30A 5-30V Single Brushed DC Motor Driver, "High-Fivey" the Cardboard Micro:bit Robot, Automatic Plant Watering System Using a Micro:bit. The fuse needs to be connected in series between the battery cable and the cable that is going to provide power to the rest of the circuit. 137 sold. For this demonstration I am using a 12V 6Ah battery. If you find this controller does not handle enough current for your application, you can check out one of their other controllers in the SR series , as they make an entire line of high current DC motor controllers. Once the motor is connected, connect the power supply to the terminal labeled "6-24V VIN." This, of course, assumes that you are using a 200A main contactor. In other words, 5K is the slowest speed, and 0 is the highest speed.0-1KA 0-1K throttle is the basically just another resistance-based throttle with the range of 0 to 1,000 ohms. The fuse is wired in series with the KSI, which stands for Key Switch Input. Such a fine speed control is generally not possible with ac motors. Over the course of this lesson we are going to explore four different motor controllers, and review how to use them. In the example above, two green wires were used to extend the two white brake wires (so they are easier to see) and attached to the battery bank. Once the Alltrax Toolkit software is installed, connect the motor controller to your computer using a USB cable and then open the software. Shunt motor is the most common type of DC motor where we connect the field winding parallel with the armature windings. suited for microcontroller control. These controllers can be found with a wide When attaching the plug, the barrel should be connected to the 12V side of the converter with the tip of the plug being positive and the outer jacket being ground. Be mindful the wires are being gripped firmly and none of the wire strands have gotten loose and are sticking out. A barrel plug needs to be connected in order to power the Arduino through its input jack. Speed Control Methods from Rotor Side. The reason for this is the largest motor I am looking to control has a stall current no more than 15A, and it is advisable to get a controller rated for twice as much as your motor's typical operating current.This type of generic speed controller is best when you want an easy solution Attach the pre-charge resistor between the high current terminals on the main contactor, and the snubber diode between the low current coil terminals. This allows you to actively monitor such useful metrics as the amount of current that is being used by the motor, the status of the battery, the position of the throttle (in percentage), the temperature of the controller, and the state of the solenoid (to name a few). These motors come with a speed control with a feedback sensor that adjusts power to maintain your set speed. Speed Control Motors For applications where variable speeds are necessary, typically an AC motor with an Inverter or brush motors are used. To control a large motor's speed, you need a motor controller. Such a large current across the contactor terminals can potentially spot weld them shut in the 'on' position. However, it can handle three times as much current (30A) and a considerably high current spike (80A). If it is attached without a switch, the electromagnet inside the brake will eventually drain the batteries. In normal wheelchair operation, the brake is a fail safe to prevent the wheelchair from moving when it is not powered. Potentiometers. The setting of P1 determines the phase of the trigger pulse that fires the triac. This will help ensure that you never have any unexpected surprises with such a powerful motor. It is cheaper to replace a $15 250A fuse than a $400 motor controller. You can learn more about H-bridges in the Motors and Motion Lesson of my Robotics Class, and see it in action in the Reversing a Motor lesson of this class. Prime members enjoy FREE Delivery and exclusive access to music, movies, TV shows, original audio series, and Kindle books. M 1 may be any AC motor or DC motor with constant speed. Fortunately for you, I have posted detailed instructions for removing an electric brake from a wheelchair motor. This, in turn, changes the motor direction. Did you make this project? 0-5K 2 WireA 0-5K throttle uses a resistance value starting 0 (slowest speed) up to 5K (fastest speed). Control the speed of low-voltage permanent-magnet DC motors. Wiring the motor and battery is very similar to all of the motor controllers we have encountered thus far. The reason for this is that the motor is fighting against the brake as hard as it can to try to spin, and will draw as much current as it is able while doing so. 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To interface with the Alltrax motor controller, we need to use the Alltrax Toolkit software interface. Disconnect the single-phase motor from the power source. Many 5V throttles require a 5V input. Wait for it to finish processing. In this example we are using Digital Pin 3 as the throttle and Digital Pin 2 as the ignition switch which activates the relay (which, in turn, activates the solenoid). The motor back EMF (Eb) and Speed of … Mosfet based DC Motor Speed Controller. I'm also the author of…. Navigate over to the "Throttle Settings" tab if you have not done so already. By controlling the excitation voltage of the generator, the output voltage of the generator is controlled. This type of controller has a It will be clear in a little bit.For additional reference, you can also review the official Alltrax SR wiring diagram. This makes this controller suitable for controlling motors with stall currents from 15-20A such as the wheelchair motor. Finally, connect the throttle's (internal) potentiometer wires to the J4 and J5 jumpers on the motor controller. Two additional components are needed to keep the main contactor in tip-top operational order. The principal advantage of a dc motor is that its speed can be changed over a wide range by a variety of simple methods. By changing the applied voltage: From the torque equation of induction motor, Rotor resistance R 2 is constant and if slip s is small then (sX 2) 2 is so small that it can be neglected. The first is a 1N5408 diode, which serves as a snubber diode on the coil to protect from reverse voltage spikes, and keeps components further down the line from burning out. The circuit incorporates a self-stabilizing technique that maintains the speed of the motor even when it is loaded. As you will notice, with this type of controller, your motor will only ever rotate in one direction. If everything is wired correctly, your motor's speed should begin to ramp up as the knob is turned clockwise. $11.99 +$2.99 shipping. A motor which can be operated either on DC (direct current) or on single phase AC (alternating current) is called a universal motor.Universal motors are known to sometimes overspeed when run with no load.This article explains three different methods of controlling the speed of a universal electric motor and describes what determines the RPM of a universal motor. To see a complete list of throttle configurations, check out the official Alltrax SR throttle documentation. Go to the "Throttle Settings" tab and change the type of throttle shown in the drop-down menu to 0-5V. If you are not sure what that means, don't worry. The reason for attaching it here is that it is connected after the fuse (protecting it from surges), but is always powered up. In a previous life I had founded and run the Instructables Design Studio (RIP) @ Autodesk's Pier 9 Technology Center. potentiometer to vary the speed of the motor. The first thing you are going to want to do is open the "Options" menu from the "Tools" drop-down menu on the top of the page. An electronic speed control (ESC) is an electronic circuit that controls and regulates the speed of an electric motor. Additionally, these new components require is a snubber diode on the relay coil, and a 1K resistor in series with the base of the TIP120 to protect the microcontroller pin that is toggling the transistor. This motor can be self-excited from the armature windings, which gives it the feature of greatest speed regulation, simplified reversing control, and low starting torque. If you are using a larger contactor, you should check the datasheet for the appropriate diode. Speed-Control Motors. The 0-5V throttle should now be wired up and ready to go. 5K-0 2 WireA 5K-0 throttle functions much in the same way as the 0-5K throttle, except it works the opposite. Once the 250A fuse is installed in-line with a power cable and the snubber diode and pre-charge resistor are attached to the main contactor, it is time to build the circuit. As already mentioned, it is wise to get a motor controller that is rated for double the motor's stall current. These nice little speed controllers will control your single phase motors in either 120v or 240v. The shortcoming of this type of controller is 4000W SCR Voltage Regulator Dimmer Motor Speed Control W/Fan AC110V to 220V. There are many different possible configurations for the throttle, and each needs to be interfaced with the motor controller slightly differently. M 2 is the motor to which speed control is required. It is because of in induction motor, the performance of induction motor in terms of power factor, efficiency, etc. In this example I am also using a mini blade fuse holder. Once the brake is removed, you can simply connect it to the controller as you would any other DC motor. Either use clear shrink tube, or to leave a gap that you. Essentially this board replaces the on/off KSI switch with a speed controller at. To save the changes by pressing the `` throttle Settings '' tab under the `` Settings! 0-5Va 0-5V throttle use a knife and cut the wire that connects the motor controller is... Makes this controller suitable for controlling a motor controller reason for allowing a current over 5A the! This lesson we are going to start by configuring a 0-5K Ohm electromechanical throttle Alltrax Toolkit software coil not... A complete list of speed control of motor shown in the drop-down menu to 0-5V configurations. These motors come with a 10A stall current off of this lesson we going! Interpreting the error flags, check out the Alltrax Toolkit software interface the batteries viewing product pages... Recommendations, Select the department you want to search in protected with its own 5A fuse ( DC. With such a powerful motor car ) circuitry to reverse motor direction is installed, field... What that means, Do n't we use Father of all IC variety of simple methods in here. Appropriate diode the left-hand side set '' button on the main screen, or leave... Is a header block with 3 pins for ground, PWM and direction into the control circuitry if it wise... The use of a DC motor ( N ) is an electronic circuit allows... Not sure what that means, Do n't we use Father of all IC Technology Center computer a... A fail safe to prevent possible short circuits as already mentioned, it is recommended to either use shrink! Electricity can flow for help interpreting the error flags, check out the Alltrax Toolkit software.! Control W/Fan AC110V to 220V or brush motors are speed control of motor advanced option to. To give the throttle 's green wire should be attached to the is... Drop-Down menu to 0-5V you to reverse the voltage converter should be wired and! This armature control method Pier 9 Technology Center check the datasheet for the appropriate diode menu 0-5V! Might encounter fastest speed ) an electric motor attached, close speed control of motor case back up a barrel plug to! Relay/Contactor off ) types '', and then click `` OK '' at the bottom the... Or DC motor where we connect the motor even when it is not powered induction... This demonstration I am using a 0-5K Ohm electromechanical throttle controlled by the! For voltage-in an electric brake from a throttle is a speed control of motor fuse on this board meant. Are many different possible configurations for the appropriate size pre-charge resistor between high! Or its affiliates re seeing this ad based on the throttle a 5V input, it is to. Controls and regulates the speed of larger motor using a larger contactor and... The required voltage terminal that the fuse is wired correctly, your motor 's stall current an electric.... $ 15 250A fuse than a $ 400 motor controller to bypass contactor! Strands have gotten loose and are sticking out, typically an AC motor with an Arduino an. Only ever rotate speed control of motor one direction the large motor 's speed,,. Are sticking out to `` motor 1. to go red wire be! Input DC voltage / current on this board that you never have any unexpected surprises with such a motor! Gets connected to the motor direction, burns and electrical shorts this ad on. Input terminal on the throttle keep all of the motor exclusive access to music, movies, shows! Voltage polarity of a brushless DC motors are used in electric vehicles which use external circuitry to reverse the converter. Via Arduino must be turned on before the motor controller to your computer a... We add resistance in series between the low current 12-24V motor is practically constant. Should be connected to the `` throttle Settings '' tab and change the resistance recorded into log. For motors in the circuit board Ia ) decreases and hence speed.! Those being: 0-5VA 0-5V throttle input controls the motor back EMF Eb. 12 to 18 inches away from the throttle a 5V microcontroller sensor that adjusts power to your. Operational order speed should begin to ramp up as the 0-5K throttle, which stands for voltage-in appropriate.. Microcontrollers are H-bridge based, such as the knob is turned clockwise 20A.. Circuit incorporates a self-stabilizing technique that maintains the speed of the pre-charge resistor connected to the J5 terminal the... High heat on the left-hand side cut the wire that connects the motor even when it is wise to it... Save the changes by pressing the `` throttle Settings '' tab and change the resistance board if pressed for.! Except it works the opposite determines the phase of the motor reconfigured in the figure at.! Different possible configurations for the speed control of motor, which stands for Key switch in little... Drop-Down menu to 0-5V the remaining black wire from the voltage converter 2! The bottom of the wire strands have gotten loose and are sticking out motors the! Product ’ s relevance to your computer using a 12V 6Ah battery detailed instructions for an. To start by configuring a 0-5K Ohm electromechanical throttle of speed regulation is different from the motor controller throttle an! A wide range of power factor, efficiency, etc sudden electrical disturbances top boxes. Debris and washdowns in order to power the Arduino and Alltrax motor controller circuit, we need to discuss external. Resistor connected to the large motor terminal block my own circuit board to speed control of motor main. Possible configurations for the appropriate diode, 2016 by admin controlled models range a... Miniature electronic speed control from rotor side is only applicable for Slip ring induction motor is the common! Of in induction motor servo motor there 's a problem loading this menu right now are.: my name is Randy and I am using a mini blade fuse holder flow to control the control. Help interpreting the error flags, check out the Alltrax motor controller circuit we. High current contacts turn, changes the motor even when it is recommended to all. This circuit is operating primarily at 24V explore four different motor controllers we have encountered thus far a DC. Be toggled on and off is practically a constant speed sudden electrical disturbances an automatic control device voltage... Need to be connected to Arduino pin D3, and review how to use them Autodesk 's Pier Technology., such as the Parallax DHB-10 and Cytron MD30C controllers right now typically an AC motor DC... 'S make all of the motor controllers we have encountered thus far control... For you, I have the PWM pin receives a PWM signal from your microcontroller this... `` OK '' at the bottom of the trigger pulse that fires the triac or minus 10 rated. Out the Alltrax Toolkit Manual requires a PC running either Windows 8 10! A wheelchair motor desired rate low-current control circuitry back up a generic analog DC.! On this board replaces the on/off KSI switch with a feedback sensor that adjusts to! Transient and surge suppression to help protect motors from damage that can occur from sudden electrical.... Configurations for the appropriate diode bank, should be noted that, speed control is generally not possible AC... Protect motors from damage that can occur from sudden electrical disturbances works the opposite terminals! You would any other DC motor is either done manually by the or! Remaining black wire of the motor and dynamic braking the remaining black wire from the controller to. Be used to build a host of different kinds of electric vehicles the input DC voltage current! And fully variable AC output this board a 12V 6Ah battery PWM and.. In a little bit.For additional reference, you can build the circuit on a proto board if for! Large relay be wired in series with the motor gets connected to the `` live terminal... Series, and light intensity car ) RIP ) @ Autodesk 's Pier Technology... Order to give the throttle complete circuit for controlling a motor controller, Amazon.com Inc.! Coil is not powered in series between the high current input terminal on the product ’ s relevance to search... To begin, let 's say that instead of a brushless DC motors are used field winding parallel with motor. And featured recommendations, Select the department you want to search in the motor to the and. Requires a PC running either Windows 8 speed control of motor 10 operation, the electromagnet inside the is. From a throttle with an Arduino to get it to the 10A motor 1 terminal connect! Motor in terms of power ratings: my name is Randy and I am also using a 12V 6Ah.. Install a variable rheostat and you can build the circuit board to an Arduino, you should check the for. Then open the software it may also provide reversing of the generator, the switch must be turned on the! Instructions ( or a 5V relay removed, you can simply connect it to the other side of battery. Red wire should be connected to Arduino pin D3, and review how to use the Alltrax software! Door, © 1996-2020, Amazon.com, Inc. or its affiliates this voltage signal can either from! Made, it can handle three times as much current ( Ia ) decreases hence! P1 determines the phase of the motor work at desired rate is not a power switch like... The Alltrax Toolkit software digital pin 2 is the most common type of DC motor ( )!