Easy Driver stepper motor driver. An Open Source. Hardware Stepper Motor Drive Project. L298 - Dual Full Bridge Driver, L298HN, L298N, L298P, L298P013TR, STMicroelectronics. ROB-09457: The TB6612FNG motor driver can control up to two DC motors at a constant current of 1.2A (3.2A peak). Two input signals (IN1 and IN2) can be used to contro. ![]() Please don't support. Easy Drivers. Spark Fun. This page mainly describes the latest version of the. Easy. Driver board. Description: Bruce Shapiro got me to design. UBW (USB Bit. Whacker) project to solve his problem of disappearing parallel. The UBW design has exceeded all of my expectations. But there was. still a problem! Bruce traditionally used the UCN5. B stepper motor. driver chip for his Egg. Bot. classes because it is easily breadboardable and very simple to. Unfortunately, they are now $1. Bruce wondered if I could design and build a replacement. And so now we have the Easy. Driver design. There is now an official Egg. Bot. that you can purchase! It uses an Ei. Bot. Board, which I. designed and consists of a UBW + 2 Big. Easy. Drivers. The Ei. Bot. Board is. now available for purchase at Spark. Fun. and Evil Mad. Scientists. Knock- Off Easy Drivers. Over the years, the Easy Driver has become popular enough that. I am. flattered, truly I am. And this is open source hardware after all. The. license that the Easy. Driver is released under requires at least. These knock- off manufacturers will normally.
![]() It appears that Electronics DIY has decided to build. Easy Drivers, taking off the . This is in violation of the. There are lots of others too - all of the very. Easy. Drivers that are now on EBay, Amazon, and. Aliexpress are knock- offs. None of them support me in any way, but. I end up fielding tech support for their boards because people. So please help support OSHW and buy. Spark. Fun or Seeed. Studio. They are fantastic and not only. OSHW but actively support designers like. Quick Specs. Each Easy. Driver can drive up to about 7. A per phase of a bi- polar. It defaults to 8 step microstepping mode. For the complete specs of the design, read. A3. 96. 7 datasheet. It has a variable max current from about. A/phase to 7. 50m. A/phase. It can take a maximum motor drive. V, and includes on- board 5. V regulation, so only. The best part - low cost. The parts cost is. Quick Pin Description. Please see the Allego A3. The Easy Driver is basically just a breakout. However, if all you need is a. GND : There are three GND (Ground) pins on the Easy Driver. Connect the. negative side of your power supply, as well as from any other. Easy Driver to one or more of. GND pins. M+ : This is the power input to the Easy Driver. Connect this. to the positive power supply lead. This should be a 6. V to 3. 0V. 2. A (or more) power supply that is clean (low ripple). A and B : (four pins) These are the motor connections. See. below diagrams for how to hook these up. A and B are the two. Make CERTAIN. that this connection to the motor is solid, and NOT through a. STEP : This needs to be a 0. V to 5. V (or 0. V to 3. V if you've. set your Easy Driver that way) digital signal. Each rising edge. DIR (Direction) : This needs to be a 0. V to 5. V (or 0. V to 3. V. if you've set your Easy Driver up that way) digital signal. The. level if this signal (high/low) is sampled on each rising edge. STEP to determine which direction to take the step (or. That's it - those are the only signals that you absolutely need. All the rest below are optional - in other. Easy Driver sets them to reasonable default values. MS1/MS2 : These digital inputs control the microstepping mode. We default it to slow decay mode, but you can. If you cut jumper APWR (SJ1). V pin as a VCC input to the Easy Driver. VCC supply. Oh, so awesome: where can I buy one! This design is open source hardware. It was developed in. Spark. Fun, and they manufacture and sell it. If you do. decide to manufacture the Easy. Driver for yourself or for sale. I can continue. to provide support to Easy Driver users, so contact me. Spark. Fun DOES sell Easy. Driver. boards and they're only $1. Also, please note that a Bigger, Badder, and all around Better. Easy Driver has been designed. It's called the Big. Easy Driver (BED). You can read all about it at the Schmalz Haus Big Easy Driver. News: (0. 8/1. 8/2. Added a new. section to the FAQ below about the two jumpers on the Easy Driver. See the results. lower down this page, under Question 1. Xavier wrote a great tutorial on using Easy. Drivers with Arduino.(0. My. DIYCNC is. now using Easy Drivers in some of their products, and is even. Check out their cool CNC. New Easy. Driver and Big Easy Driver Examples page - with Arduino code. It had no problem running down to. V (this is with a factory fresh Easy Driver 4. And, it ran. really cool. Note that you'll need a very low coil resistance motor. Very minor update to schematic and BOM for Easy. Driver. v. 4. 4 - C3 is now 4. F. It was. previously listed as 1. F.)(0. 8/1. 9/1. 1) We now have an Eagle. Easy. Driver v. 4. Easy. Drivers on their board.(0. It appears that there are two different types of current. Easy. Driver v. 4. If you. have one with the squarish white box of a pot (as per the v. MIN and MAX silkscreen. The previous version of the pot (see v. MIN and MAX silk screen. I don't know why the pot vendors. Note, the board is identical, it's only that one. Note that v. 4. 3 and v. MIN and MAX words backwards on the board. So if you have a small. CAREFUL! The likely result is that you will set it to MIN. A will go through your motor, and it will get quite. There will be a new v. Version 4. 3 has now been released to Spark. Fun - only. difference being two mounting holes.(1. After a very long process (due to my procrastination and. Easy. Driver! In very close collaboration with. Spark. Fun, I'm happy to release version 4. This new. version has several very nice new features, and still has the same. Thanks Spark for making this design available to. Thanks Daniel! NOTE: Many people attempt this setup without connecting the grounds. Easy. Driver and Arduino (or other pulse source). It tends to not work that way! So make sure you always. Added project files for V3 design.(4/6/0. Initial webpage created. Documents V1, V2, and V3. Easy. Driver board. Easy Driver downloadable design files: Version Notes: Easy. Driver V1 - This was the first attempt. I had two boards. Batch. PCB (Very. The design worked fine but because the board was. Also did not have variable. V regulator. Easy. Driver V2 - This was the second attempt. I had some boards. Futurlec. without solder mask or silkscreen. The board was twice the. V1, and routed to dissipate heat much better. The 5. V. regulator was added. I have since modded the completed boards to. Easy. Driver V3 - A refined version of V2, with the variable. I. have not had any of these boards fabbed yet, as I'm confident in. V2 boards. Here are the. V3: Every I/O pin on the driver chip now comes out to headers. K resistors. This. You can change MS1 and MS2 to do full step, half. You can put the chip to. This allows. interfacing with things like 3. V Arduinos or other processors. V. If you want to supply your own logic power to the. Easy. Driver, cut jumper SJ1, and supply 3. V or 5. V into pin 1. JP4. If you want the Easy. Driver to power some small circuit, you. V (or 3. 3. V) coming from pin 1 of JP4. How much. current can you pull from here? Well, feel the regulator. If. it is uncomfortably hot, then you're using too much. How hot. it gets depends upon what voltage you supply to the. Easy. Driver. TP1 allows you to put a meter on the VREF signal as you turn. Measuring this voltage allows you to. I. never do this myself - I adjust the pot until things 'feel'. The value of the bulk cap is listed at 1. F on the. datasheet, but 4. F is all that is really necessary. The. bigger the better - but the Allegro datasheet says 4. F is. fine. Spark. Fun may use 4. 7u. F caps on their boards and that's. OK. Easy. Driver V4. Exactly the same as V4. Easy. Driver V4. 4 - Exactly the same as V4. MIN/MAX. silk screen error has been fixed (well, not really, since the. See note Q9 below. Easy. Driver v. 4. Major change from v. STEP and DIR as well as. STEP and DIR. This helps prevent damage during. Common Questions and Answers: Q1) My motor says it can only take. V at 2. A. Will the Easy. Driver (running from up to 3. V) blow up my. motor or damage it in any way? A1) Nope. You're safe. But what. we are concerned with is maximum current. The voltage spec of the. Easy. Driver. Then it will cut the power to the coil until the. Any motor that's rated for 1. A/coil. (or more) will work with the Easy Driver just fine, no matter what. Note that if your motor is rated for less than. A/phase, you should adjust the current set pot on the Easy. Driver. to dial down the maximum coil current to match your motor. Q2) So. shouldn't I run the power to the Easy. Driver at the voltage that my. V as per the above example)A2) No. The voltage rating. DOES NOT MATTER. Trust me on this. At least to. a point. You want to run the Easy. Driver with as high a voltage as. Lower voltages produce a lot less heat. ED and the motor) but produce lower maximum speed and. Higher voltages (up to 3. V) get you more torque at higher. ED will get much hotter. You make the decision. Most people. are perfectly happy running their ED at 1. V, and there are tons of. V and are cheap. The technical. Easy Driver is acting like a switching. It is stepping down the voltage and stepping up the. The coil of the motor is basically like the inductor in a. The chopper circuit switches the coil voltage on and. Note that you can run the Easy. Driver with a supply voltage of as low. V. This does NOT mean that you will get good stepper motor. I can almost guarantee you. However, even at 7. V or 9. V, the torque on most stepper. Where you really need the. Another important point that a lot of people don't realize is that. For example, the small stepper motor. Spark. Fun (https: //www. V of input to the Easy Driver and the current adjustment turned all. A/coil. In other words, you probably don't have. Try it in your system first - you may be. Q3) How. much current does my power supply need to produce? A3) The max that the. Easy. Driver can shove into the motor is 7. A/coil. With 2 coils per. A. So your power supply needs at least 1. A to be. completely safe.
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