![]() The overall size of this device is important - so perhaps a slower motor is in order, but I want to learn as much as I can with the components and tools I have to-hand so I know what I need. You may find that the FQP30N06L, with its much lower on resistance, will provide the current that the motor needs.įair enough, hopefully that will be the case - do you think this would also impact the RPM though? I'm planning on reducing RPM and increasing torque with a DIY gearbox, but this is something else I'm new to. Enough of a resistor to limit the current to the motor. ![]() Since the MOSFET is not turned on it acts as a resistor. ![]() My next step is reading this post, but I've been busy working my way through Arduino lessons (just reached buzzers and creating melodies with tones). I wish I knew what this meant, or how to read it on the datasheet. At 3V gate voltage the MOSFET will dissipate 250W when trying to conduct 10A. the loop function runs over and over again forever the setup function runs once when you press reset or power the board There's nothing wrong with the circuit (I tried inverting the MOSFET connections which completes circuit and runs the motor - even without the sketch running, maybe not a good idea).Īny idea what the issue is? The motor? Something else? Any work-arounds?įYI - My ideal motor speed is in the vicinity of 72rpm, although I can go a little lower and 2 or 3 times higher potentially with my DIY gearbox (not pictured). When I plugged it all in and uploaded very simple code, nothing happened other than the MOSFET heating up (I quickly switched off). That 'other task' must be made non-blocking, so that you CAN tell the motor to step often enough. especially when the arduino is also doing other task. Diddling with the PWM frequency will be pointless. Using a PWM pin is not the correct solution. I'm not sure of the specs of the hobby motor, but here is the Amazon listing: the problem I have is doing it at the correct frequency. I'm using a 2N7000 N-channel MOSFET, so I think the same one as in the video. ![]() I've been following this video for advice: Arduino Motor Interfacing using MOSFET and PWM - YouTube My interest in Arduino comes from wanting to try a few things with analogue photography equipment.Īnyway, I've been trying to use a hobby motor with the Arduino so I can use Pulse Width Modulation to control and test the speeds. We’ll then look at an improved Arduino design to control our DC gearmotors.I'm a complete newbie (got my first Arduino two days ago) but loving the lessons so far. I will then “fine-tune” it to run a LOT more efficiently, and I’ll demonstrate its capabilities by driving a 10 Kg (22 lb) weight around the room! We’ll put our motor controller to the test and observe its performance. I’ll show you how to hook it up as well as how to code for it. It is a very easy controller to use with an Arduino. The Cytron MD10C is a single-motor H-Bridge controller that can support motors that draw up to 13 amperes continuous, with peaks of up to 30 amperes! Amazingly this device is not only cheap, it also is so efficient that it doesn’t even require a heatsink to source those impressive current levels. But there are a few inexpensive options, and I’ve got a great one for you today. Most large H-Bridge controllers are expensive, many cost as much or even more than the motor they are driving. We have used PWM to control small DC motors many times but what happens when you need to control a bigger motor? The L298N is the usual “go-to” motor controller but it doesn’t have the current capability to handle anything that draws over 3.5 amperes., so it won’t work with large motors. I’ll also show you how raising the PWM frequency can make your motor controller design far more efficient. Today I will show you an inexpensive and efficient H-Bridge motor controller - the Cytron MD10C. Pulse Width Modulation (PWM) is the ideal method of controlling large DC gearmotors, but driving these motors can often be challenging and expensive.
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