![]() ![]() You can download the gerber files from below. For version V2.0 now all the problems are fixed and the big tracks are exposed so I could fill those with solder for more current. The V1.0 had some errors such as some bad GND connections, wrong pin for the Buzzer and also the power tracks were covered by the soldermask. In the photo below you can see the first version of the PCB in red but also the final version with black soldermask. We also have the ATmega328 microcontroller, the CH340 programmer so we could upload codes with the USB connector and a few more extra components such as buzzer, LEDs and pads. This inputs will be used to detect the position of the rotor and know when to switch to next step of the rotating sequence. This project needs 3 H-bridges and 2 L298 PCBs. So for that, using some resistors of 10K and 33K we lower the voltage so the analog input of the ATmega328 could read that. Half of H-bridge is used to connect to each coil of brushless motor: Look inside L298 IC, it is possible to flow current from half H-bridge to another half H-bridge: 4. The voltage from the motor will be higher than the maximum voltage that the ATmega328 could tahe as input, in this case 5V. Each of these MOSFETs has a driver control with the IR2101 which is a dual driver so it could control both the high and low sides of the bridge. This article will look at controlling the speed of a Sensorless BLDC outrunner motor, often used in drone construction, using an ESC (Electronic Speed Controller) and an Arduino board. These are 6 MOSFETs in a bridge configurations that are used to energise the coils of the motor. The next block is the triple phase bridge. ![]() The main input could be from 11 to 18V but this block will aloways give 5V. Brushless motors are still challenging to be properly driven and control due to their complex and mostly expensive controlling demands they require But this article is aiming to instruct you through an easy and affordable path for driving your Brushless motor using ARDUINO and SOLO. This is a buck converter circuit that will give 5V for all the digital parts. First things first, we have a power block. Now the schematic might look complicated but is not. Interrumprions and internal comparator of ATMEGA328 The schematic and why we need each part So this is a sensorless brushless motor speed controller since it uses no sensor to detect the rotor position. 252 20K views 2 years ago Arduino Tutorials This is an example that demonstrates how to control a brushless motor with a potentiometer and the Arduino Uno. In this tutorial we will see how to control the rotation, the speed, detect the BEMF and by that know when to make the switch to the next step of the sequence. It has to conmutate very fast and by taht rotate the rotor of the motor. To control this input, the ESC must apply a special sequence of LOWs and HIGHs signals in a predefined order. ![]() The setup is identical to the schematic I uploaded except I'm using an Arduino Nano, a different gyro sensor (which in this case doesn't matter as I'm only dealing with the motors), a 14.8V LiPo battery, and the correct ESCs for the battery.So what is an ESC? Well, electronic speed controllers are used to control brushless motors, in thisc ase the motor has a triple phase input. The issue I've been having is that when I upload the code to the Arduino the motors both go full throttle instantaneously despite the 5 second delay in setup() and the fact that I have the potentiometer set to a 1000 microsecond pulse width which shouldn't allow the motors to move. So, I wrote a very basic program to take input from a potentiometer and map it to a range of 1000 to 1050 microsecond PWM signal and send it to each motor. Recently I've been having trouble with the control of the motors. Over the last few months I've been building a self-leveling PID system with 2 brushless DC motors connected to basically a teeter totter. ![]()
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