The second has the same pinning as the DRV8825. The A4988 is a complete microstepping motor driver with built-in translator for easy operation. 853. zip: 2023-04-04: 39. Also note that 2 amps is very much the upper limit for an A4988. 5 V. 5 milliseconds (ms), the servo will move to the neutral position (90 degrees). Add to cart. Output Drivers Load Supply Voltage Range VBB Operating 8 – 35 V Logic Supply Voltage Range VDD Operating 3. Package Dimensions : 5. Each BigEasyDriver (BED) can drive up to about 2A per phase of a bi-polar stepper motor. It has five different stepping resolution and has a wide operating voltage range from 8 volt to 35 volts and can deliver current upto 1 Amp. Unzip the download and you’ll have a folder called "grbl-master". The Big Easy Driver is designed around the Allegro A4988 motor driver. 7 = 2. Our Black Edition A4988 stepper motor driver carrier is a higher-performance drop-in replacement for the original A4988 stepper motor driver carrier. The picture shows the connection of A4988 motor drivers and Arduino CNC Shield V3. 1 Features of A4988. A. First of all, download Arduino Library for Proteus by clicking the below button: Arduino Library for Proteus. After installing the SSD1306 library from Adafruit, type “ GFX ” in the search box and install the library. Pololu A4988 stepper driver - A4988-based; equivalent to A4983-board but offers overcurrent protection. on. The DRV8825 would be a more suitable driver for your motor if you need the full torque. Checked with several batteries which show no problem, even had a friend check the motors via other different driver(YS-DIV268n) he had and the motors worked fine. L298N Module can control up to 4 DC motors, or 2 DC motors with directional and speed control. Pololu driver boards (8+8 pins): . nRF24L01 – How It Works, Arduino Interface, Circuits, Codes. Make sure to set the max current on the driver board to the motor limit (see below). Ramps 1. 35 V) than the A4988, allowing it to operate at higher voltages safely while lowering the possibility of LC voltage spike damage. I also connected the voltage of 5V (pins 4 y 6) and 12 v after transform it. 2 VPart 3A: Stepper driver settings (hold current and step interpolation) Hold current: this value is set from 0. Hope its possible to Drive stepper motor using DAQ (Digitial IO). e. The A4988 is a complete microstepping motor driver with built-in translator for easy operation. It is never a good idea to run electronic equipment close to its limit. The STEP and DIR pins are connected to Arduino digital pins 3 and 2 respectively. First I set the driver voltage to 12v (since Imax = Vref/(8Rs); Vref=1. The A4988 stepper driver, originally made by Pololu, will interrupt the current to the motor for a little while if the it gets too hot. By setting appropriate logic levels to those pins we will set the motors to at least one of the five-step resolutions. The A4988 driver allows for versatile operation of the motor, while the ESP8266 enables remote control. b) Compare step motor driver modules (1298,1293,a4998,drv8825,uln2003) c) Compare D1 and D2, write disadvangates. The problem is, I cannot adjust the A4988 to get. Clear. 0. Hello, To test one of your A4988 boards, you can just hook it up with some minimal connections and then measure the voltages on the motor outputs. Instead of using a joystick to control the stepper motor movements after Homing, we will be using the Serial Monitor window. h file of Marlin 2. If the current is too high for the heat sinking, the motors will pulse as the current is interrupted and restored. , Ltd. Please see the A4988 Stepper Motor Driver Carrier product page for more information about the driver. Ive read somewhere that the correct current limit on 28byj-48 is somewhere between 0. Operating Voltage: 35V Min. 508. This product is available in full, half, 1/4, 1/8 and 1/16 step modes operate bipolar stepper motors, output drive capacity of up to 35 V and ± 2 A. The A4988 stepper motor driver carrier is a breakout board for Allegro’s A4988 microstepping bipolar stepper motor driver. However if I adjust the current limit to around 0. Each package comes with three drivers with a small heatsink and header pins installed to be used with. The is a complete microstepping motor driver with built-in translator for easy operation. Remove the A4988, and remove the ms1 and ms2 jumpers (see photo). 1,500. This driver module has a built-in translator that means that we can control the stepper motor using very few pins from our controller. A 4 amp motor really needs a 5 or 6 amp driver. Quantity. // Include the AccelStepper library: #include. I used a 10K Potentiometer and connected it to the A0, analog pin of the Raspberry Pi Pico Board. Para tal, usamos um arduino Uno, um motor de passo. Bạn sẽ thấy hai tên file là *. Purchase this product now and earn 2 Robu Points! The A4988 driver Stepper Motor Driver is a complete micro-stepping motor driver with built-in converter, easy to operate. Easy to use and quick to get started. Acceleration is supported. tmc stepper driver. The difference is that when inserted into the plate, it is necessary to invert the top part, since both have potentiometers, but on different sides. OUTPUT DRIVERS Load Supply Voltage Range V BB Operating 8 – 35 V During Sleep Mode 0 – 35 V Logic Supply Voltage Range V DD Operating 3 – 5. The problem however seems to be in. The code I am using is: /* Simple Stepper Motor Control Exaple Code * * by Dejan Nedelkovski,. For the complete blog post visit: achieved this by using a Dasduino and a stepper motor with the associated A4988 driver. VCC, GND: This is the A4988 driver module power supply pins. The A4988 is a complete Microstepping Motor Driver with built-in translator for easy operation. Harga A4988 Reprap Stepper Motor Driver for CNC 3D Printer AH87. These two Proteus library zip files are named as: ArduinoTEP. 7amps. EGP 115. Esmacat is a powerful platform that can be used to develop DAQ sensor interfaces and motion control applications with hard real-time constraints. It has two voltage regulators (5 V and 3. 3V and 5V logic supply. For a AccelStepper::DRIVER (interface==1), this is the Step input to the driver. Make sure to set the max current on the driver board to the motor limit (see below). 100uF capacitor between GND - VMOT. The MS1 and MS2 pins must be pulled high in order for the TMC2208 driver to provide 256 subdivision effects. DMOS Microstepping Driver with T ranslator. Open your Arduino IDE and go to Sketch > Include Library > Manage Libraries. A4988. The A4988 is a complete microstepping motor driver with a built-in translator for easy operation with minimal control lines. Choose an option 1 20. switch the power on (the motors should be connected). This is the Voron Documentation site. Pricing and Availability on millions of electronic components from Digi-Key Electronics. 2- three A4988 Stepper drivers. 4. The key features are: This driver has 200 steps per revolution in full step (1. A4988 Stepper Motor Driver Pinout. So basically, think of the A4988 as a motor driver. AA4998 (American Airlines) - Live flight status, scheduled flights, flight arrival and departure times, flight tracks and playback, flight route and airport. A4988 Product details. How to drive a stepper motor easily using A4988 and Arduino. 8 degrees per step). DRIVER A4988. 14. 99. El driver Pololu A4988 permite controlar motores motores paso a paso bipolares de hasta 2A. pdf is a document that provides detailed information about the Pololu A4988 stepper motor driver carrier, a breakout board for Allegro's A4988 microstepping driver with translator and overcurrent protection. It also has pins M1-M3 to set the microstepping mode. Compare. CNC Shield V3 Engraving Machine. Power connections. The reference voltage is equal to the maximum motor current, multiplied by 8, and then by the current sensing resistance. Included hardware. 1" male header. 2. Code. Please slide to verify. With the jumper open, VCC will be 5V. O chip A4988 possui duas pontes H com transistores FET DMOS para fazer o controle de motores de passo Bipolares. You can also solder your motor leads and other connections directly to the board. 5 × 20. I can code in C and C++ but I cant find useful library to control those stepper motors. A 'chopper' driver that will vary the voltage to keep a constant current, such as the A4988 or the DRV8825 chip, either direct or via a board/shield such as the Stepstick or Pololu. The driver features adjustable current limiting, overcurrent and overtemperature protection, and five different microstep resolutions (down to 1/16-step). S. Hi, First of all, i wanted to tell everyone that i am a mechanical student so don't know much about electronics. I have been trying to follow this tutorial: Besides the NEMA 17, Arduino UNO, and A4998 stepper, I'm also using the following 12V 2A power supply: However, I have been unsuccessful in getting any movement out of the stepper. The flight number or. This breakout board for Allegro’s A4988 microstepping bipolar stepper motor driver features adjustable current limiting, over-current and over-temperature protection, and five different microstep resolutions (down to. I am very new to the world of raspberrypi and I am probably making some beginner mistakes. A4988 Description. You'll another digital output to control the direction. You could also look into our DRV8825 Stepper Motor Driver Carrier, High Current, which is similar to the A4988 carriers in many ways, but can handle around 1. The A4988 is a complete microstepping motor driver with a built-in translator for easy operation with minimal. Si necesita controlar motores paso a paso más grandes como el NEMA 23, eche un vistazo al controlador de motor paso a paso TB6600. Onboard current-limiting adjustment potentiometer protects the module and motors. A4988. This library was tested with a typical bipolar NEMA-11 stepper motor with four wires: should work with any similar type motor. ) It is a chopper microstepping driver based on the Allegro A4988 driver chip. A4988 is a 16 pin driver as shown in following figure. To connect an A4988 Stepper Motor Driver to an Arduino, follow these steps: Connect the VDD pin and GND pin (next to VDD) on the A4988 to the 5V and Ground pins of the Arduino, respectively. It is designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35V and ±2A as per the datasheet. Integration with a server PC is available for. 6″ × 0. 3D Printing. 5 A – 320 430 mΩ Body Diode Forward Voltage V F Source diode, I F = –1. $7. Maybe you saw it somewhere but probably you didn't spotted these details, actually the name of the "A4988 Stepper Shield" firstly invented by inventors of Polulu Robotics & Electronics when first DIY CNC Machines appear since these Stepper drivers helps to easily driver the Steppers of CNC machines but the name itself comes from the. Additional information. Im using the driver A4988 together with stepper 28byj-48. It is intended to do the same job that the A4988 does. This breakout board for Allegro’s A4988 microstepping bipolar stepper motor driver features adjustable current limiting, over-current and over-temperature protection, and five different microstep resolutions (down to 1/16-step). The stepper motor library uses a timer which triggers an interrupt every 10us. 99 $ 9. Here are the steps: Plug the driver into the 3D printer board (beware the driver orientation, it is different for the A4988 and the DRV8825 stepsticks. The driver i am using is a a4988 Polulu with 2Amps maximum current. Depending on the manufacturer, the other dimensions of the motor may change, but the faceplate dimensions remains same. However if I feed it with 12 v there is a high frequence noise that wont go away untill I turn my powersupply down to around 9 v. a4998 motor driver. HiLetgo 5pcs A4988 Stepstick Stepper Motor Driver Module with Heat Sink for 3D Printer Reprap Suitable for Mendel Huxley Arduino. The A4988 includes a fixed off-time current regulator which has the ability. A. This device contains two sinusoidal DACs that. 8 degrees per step). The stepper motors used in earlier Anet A8-B (as bought in May 2016) are NEMA 17 SL42STH40-1684A produced by Guangzhou Shenglong Motor Co. The A4988 stepper motor driver carrier is a breakout board for Allegro’s A4988 microstepping bipolar stepper motor. . acroscene February 23, 2022, 11:11am 1. 1" male header. I have included it in response to several. SparkFun AutoDriver - Stepper Motor Driver (v13) Product Help and Resources. 5 V Output On Resistance RDSON Source Driver, IOUT = –1. Import package. Je reprends les gran. Como en la mayoría de los controladores de motores el componente fundamental es un puente-H. Je reprends les gran. What I am trying to accomplish is to allow for a stepper motor, (powered by an A4988 driver) to move with the push of a button. To use the A4988 you just set a pin HIGH or LOW for the direction, then toggle another pin to make it step. I would like to know if you already have or know where I can find an arduino code that lets me control the number of steps that the stepper motor turns, as. Calculating the Vref for the DRV8825 drivers is easy: VREF = current / 2. 5a with cooling. This provides, as well, two H-bridges like the A4988. A4988 Stepper Motor Driver Module A4988 เป็นโมดูลบอร์ด สำหรับควบคุม Stepper Motor โดยเฉพาะ และเป็นโมดูลที่ได้รับความนิยมสูงอีกด้วย สามารถควบคุม Stepper Motor แบบ Bipolar ซึ่งเป็น Stepper แบบ. CNC Shield V4. 5 mH Holding Torque: 12. 6W in total. This will act like a step down regulator (with the inductor being the motor winding) meaning the current drawn from the supply will be proportionally less than the. A4988 Stepper Motor Driver Module for Pololu RepRap 3D Printer StepStick (Pack of 2)Hoje vamos criar um programa capaz de controlar um Motor de Passo utilizando um Arduino e um Driver A4988. 508. 1. 00. Robin2 November 8, 2014, 12:54pm 1. It is capable of operating bipolar stepper motors in full step, half step, quarter step, eighth step, and sixteenth step modes. 8W per motor, hence 5. 3 VERR = [ (VREF/8) – VSENSE] / (VREF/8). 3 volt I will use 5v for the esp32 power supply and 12 volt for the stepper motor supply. 2. So, Vref should be (1. 4. : Table of Contents: Step 1: Parts Step 2: Setting Up the Motor, CNC Shield, and UNO Step 3: Writing Code and Running the Motor Full. 3V V 35V V 4 4. 0. 3. Manufacturer: List of Unclassifed Manufacturers. SKR 1. Well, right now a set of five Made in China A4988 stepper driver boards goes for around $6. Low to high transition means to step) [in] pin2: Arduino digital pin number for motor pin 2. Hi there, I recently got myself a set of TMC2208 stepper drivers to replace my A4988 driver for a project. I wanted my motors to be quieter. This module is based upon the HR4988 stepper motor driver and is ideal for use in 3D printer, CNC, and other applications where precise control of a stepper motor is required. OctagonStar A4988 Driver CNC Shield Expansion Board for Arduino V3 Engraver 3D Printer. 0 to 1. Backorder. 2A with 2A peak current. 4-Motor GCODE controller - Type "G00 X10 Y25" to move the first motor 10 steps, and the second one 25 steps. Standard Package. There is no 16 subdivision calculation for the primary control MCU's pulses 4988 and 2208. . When combined with an Arduino UNO microcontroller, the. The DRV8825 has a larger maximum supply voltage (45 V vs. The width of the pulses determines the position of the output shaft. This means we need only two signals for each driver. The code basically sets the direction of the motor with one pin, and writes high then low on the step pin to move the motor one step. The A4988 Driver Module is used to control the speed and direction of stepper motors mainly used in robotics, toys, 3D printers for motion control. 3 volt I will use 5v for the esp32 power supply and 12 volt for the stepper motor supply. Excellent, thanks Jim! RossW October 13, 2015, 1:02am #4. The A4988 is a complete Microstepping Motor Driver with built-in translator for easy operation. As. The logic voltage can be supplied from an external source, such as that powering the logic of the rest of the system, or by jumpering the output of the 5 V or 3. The headers can be soldered in for use with solderless breadboards or 0. 5mm mm. Description. Hello, To test one of your A4988 boards, you can just hook it up with some minimal connections and then measure the voltages on the motor outputs. Minimum logic voltage: 3 V. 99. PARTS USED EasyDriver Stepper Driver Amazon usa Amazon canada. cpp","contentType":"file"},{"name":"A4988. DMOS Microstepping Driver with Translator and Overcurrent Protection A4988 Allegro MicroSystems, Inc. 00 for 2 item (s) Add all to cart. LIB. また Arduino 向けの. Allowable continuous current per phase without. A4988 is a complete microstepping motor driver with built-in translator for easy operation. When powered, the motor simply flickers and stutters, but moves at a negligible speed. 19 KiB: StepperDriver-1. Arduino, RAMPS, and other popular controller boards used in the 3D printing community. wokwi-7segment. Acceleration is supported. Do you know any library which need 3 pin (Step, direction, enable) and can drive stepper motors with acceleration and deceleration. 4 amps. Std Edition. Rp11. Ive read somewhere that the correct current limit on 28byj-48 is somewhere between 0. For a 3. Description. ino into your Arduino UNO. I was already in possession of two stepper motors a NEMA 17 "103H5210-4240" and a NEMA 23 "103H7123-0140" both engines are from 1A per phase and a minimum of 24v power. If the boards get too hot, they will interrupt the current until it cools a bit. 5A8*0. Its pinnout is compatible with the StepStick design. Plug the shield into an Arduino board and load the GRBL Firmware following the steps bellow: Download the GRBL source code. Each pin present on the board has two connection points. The driver features adjustable current limiting, overcurrent protection, and five different microstep resolutions. The A4988 stepper motor driver carrier comes with one 1×16-pin breakaway 0. Included hardware. I wrote a very simple program to demonstrate stepper control using a Polulu A4988 stepper driver. The NEMA17 stepper motor with A4988 Driver & Raspberry Pi Pico can be controlled using Potentiometer as well. 6 x 3. Code: a look at a sketch designed for controlling a A4998 stepper driver. Using Arduino Motors, Mechanics, Power and CNC. There is a built in translator which allows only two pins from the. This breakout board for TI’s DRV8825 microstepping bipolar stepper motor driver features adjustable current limiting, over-current and over-temperature protection, and six microstep resolutions (down to 1/32-step). These drivers have become. 5000; Device Operation. S. Windows Application for manual control of focuser. 5 A – 320 430 mΩ Sink driver, I OUT = 1. The A4988 stepper motor driver carrier is a breakout board for Allegro’s easy-to-use A4988 microstepping bipolar stepper motor driver and is a drop-in replacement for the A4983 stepper motor driver carrier. Stepper Motor interfacing with PC16F877A microcontroller. It features a four-layer PCB for better thermal performance, allowing the A4988 microstepping bipolar stepper motor driver to deliver approximately 20% more current than our two-layer (green). Basado en el chip Allegro A4988. 9j. Optional push buttons for manual. Our Black Edition A4988 stepper motor driver carrier is a higher-performance drop-in replacement for the original A4988 stepper motor driver carrier. DMOS Microstepping Driver with Translator And Overcurrent Protection A4988 Allegro MicroSystems, LLC 7 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U. The A4988 stepper motor driver carrier comes with one 1×16-pin breakaway 0. 3 and 5 V compatible logic supply Thermal shutdown circuitry Datasheet searchWith that in mind you could put your multimeter on its 10 amp setting between the driver and the motor and see what current flows when the driver is enabled and the motor is stationary. A4998 Datasheet, A4998 PDF. It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per. 2156-A4988SETTR-T. At the heart of the A4988 driver you will find a chip made by Allegro MicroSystems: the A4988 DMOS Microstepping Driver with Translator and Overcurrent Protection. Description. You don't really need a library for that. The A4988 driver is a versatile stepper driver for controlling stepper motors for various applications. Then, if the motor vibrates or click, it may be one of these problems: You didn't connect the motor properly. 853. g. The A4988 is a complete microstepping motor driver with built-in translator for easy operation. The first section of this sketch is the same as in example 1, but the setup and the loop are different. 19 $ 10. The A4988 Driver is very cool, as it works with. Description: MG90S servo, Metal gear with one bearing. This breakout board for Allegro’s A4988 microstepping bipolar stepper motor driver features adjustable current limiting, over-current and over-temperature protection, and five different microstep resolutions (down to 1/16-step). A4988 Stepper Motor Driver - 2A Max. 5pcs A4988 Stepstick Stepper Motor Driver Module with Heat Sink for 3D PrinterStepper motor driver Allegro’s A4988 DMOS Micro-stepping Driver with adjustable current limiting, overcurrent and overtemperature protection, and five different micro step resolutions (down to 1/16-step). The A4988 stepper motor driver carrier comes with one 1×16-pin breakaway 0. The motor interface type must be set to 1 when using a step and direction driver. 7A x . It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per. It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per coil with sufficient additional cooling). on hold. FREE delivery. 853. S. Flight history for AA4998. Driving a 12V 28BYJ-48 Stepper With the A4988 Stepstick (in Full-step Mode). 4-Motor GCODE controller - Type "G00 X10 Y25" to move the first motor 10 steps, and the second one 25 steps. (fast, powerfull, silence, dont skip steps, but I have to cool the driver with a fan) I do not understand why EasyDriver is working well, because based on datasheets and forums EasyDriver current capacity is much smaller, what. It is designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2 A. 508. It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per coil with sufficient. , STEP and DIRECTION. It has 200 steps per revolution, and can operate at at 60 RPM. 2V which is less than your supply voltage, so the drivers will use PWM to limit the current to what you set on the potentiometer. Designing the Micro_step driver "A4988" for the stepper motors in proteus. You can use this diagram as a starting point, though you can just tie STEP and DIR to ground and leave the motor disconnected. 3. Maximum operating voltage: 35 V. StepperDriver. /* Example sketch to control a stepper motor with L298N motor driver, Arduino UNO and AccelStepper. There are no phase sequence tables, the high. 2 V Sink Diode, IF = 1. You can use the TB6600. 2 V to 45 V and can deliver up to approximately 1. 1- three NEMA17 stepper motors. A4988 Stepper Motor Driver is a carrier board or breakout board for Allegro’s A4988 DMOS Microstepping Driver with current limiting and overcurrent protection. 1. Conclusion. 8) or 1. A. Internal under voltage lockout. Device Control A4988, DRV8825 and generic two-pin stepper motor driver library. A4988 Stepper Motor Driver Module The A4988 stepper motor driver carrier is a breakout board for Allegro’s A4988 micro-stepping bipolar stepper motor driver. ステッピングモータ A4988モータドライバ A4988ドライバですがいろいろ出回っているみたいで・・、A4988を入手したと思っていたのですが印字がHR4988となってました。A4988 Stepper Motor Driver. 2 v. 2 A at 4 V, allowing for a holding. 5 A per phase continuously without a. That library is not compatible with the A4988. In this video we will go over how to use the A4988 Stepper Motor Controller with Arduino UNO and NodeMCU. It is designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2 A. 5 Inductance/Phase: 2. Microstepping is supported. Problem: I can not drive the motors with A4998 and DRV8825 but with EasyDriver4. It operates from 8 – 35 V and can deliver up to 2 A per coil. Minimum operating voltage: 8 V. Edit this page. 5 V) to be connected across the VDD and GND pins and a motor supply voltage (8 – 35 V) to be connected across VMOT and GND. AFAIK none of the stepper motor drivers that can provide 3. (So if your motor is 200 full steps per revolution, you would get 3200 steps/rev using the Big Easy Driver. A. NEMA 17 is a hybrid stepping motor with a 1. Ampliamente utilizado con placas de control de impresoras 3D y Máquinas CNC Open Source, como: RAMPS y CNC Shield. Each pulse represents a step (or micro-step) taken by the stepper. Ive read somewhere that the correct current limit on 28byj-48 is somewhere between 0. The driver features adjustable current limiting, overcurrent protection, and five different microstep resolutions. Posts: 182. A4988SETTR-T – Bipolar Motor Driver DMOS Logic 28-QFN (5x5) from Allegro MicroSystems. 508. Device Operation. The newer A4988 offers overcurrent protection and has an internal 100k. A4988. Pololu-2128. 4 + Arduino Mega), a small philips screwdriver, a multimeter and a couple of crocodile clips. I have so far tested with a few stepping motors (uni- / bipolar) + L298N driver / ULN2003 Driver and everything always worked without problems. (see Allegro website for datasheet) This library diverges from others that are around, in that it assumes that the MS1, MS2, and MS3 pins are connected to gpio pins on the Arduino, allowing control over. The A4988 driver allows for versatile operation of the motor, while the ESP8266 enables remote control over WiFi. You can use this diagram as a starting point, though you can just tie STEP and DIR to ground and leave the motor disconnected. Just use the PWM express VI for myRIO to output a pulse. This driver is to be able to control a A4988 stepper motor driver in java. . 0, cover the jumper cap to the pin header represents high level, do not cover the. Nevertheless, if the PM is too low or too high, the. Order today, ships today. Be aware that the DRV8825 has the potentiometer. 620-1343-2. It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per coil with. 4 Overcurrent protection (OCP) is tested at TA = 25°C in a restricted range and guaranteed by characterization. 5 V. First connect all the parts based on the circuit layout as shown in the image.