Eight day

Today, we succeeded in running a brushless motor with an arduino, wich sent a PWM signal to an ESC both connected to the batterie and the motor (the signal varies acording to readigns from a potentiometer. The code used for this test is the following:

/*
Analog input, analog output, serial output

Reads an analog input pin, maps the result to a range from 0 to 255
and uses the result to set the pulsewidth modulation (PWM) of an output pin.
Also prints the results to the serial monitor.

The circuit:
* potentiometer connected to analog pin 0.
Center pin of the potentiometer goes to the analog pin.
side pins of the potentiometer go to +5V and ground
* LED connected from digital pin 9 to ground

created 29 Dec. 2008
modified 9 Apr 2012
by Tom Igoe

This example code is in the public domain.

*/

// These constants won’t change.  They’re used to give names
// to the pins used:
const int analogInPin = A0;  // Analog input pin that the potentiometer is attached to
const int analogOutPin = 9; // Analog output pin that the LED is attached to

int sensorValue = 0;        // value read from the pot
int outputValue = 0;        // value output to the PWM (analog out)

void setup() {
// initialize serial communications at 9600 bps:
Serial.begin(9600);
}

void loop() {
// read the analog in value:
sensorValue = analogRead(analogInPin);
// map it to the range of the analog out:
outputValue = map(sensorValue, 0, 1023, 0, 255);
// change the analog out value:
analogWrite(analogOutPin, outputValue);

// print the results to the serial monitor:
Serial.print(“sensor = ” );
Serial.print(sensorValue);
Serial.print(“\t output = “);
Serial.println(outputValue);

// wait 2 milliseconds before the next loop
// for the analog-to-digital converter to settle
// after the last reading:
delay(2);
}

Even though we can control motors, in order to optimize their functionality, ESC’s need to be programmed. Also, when not running, unprogrammed ESC’s emit a periodic sound (BIP!), pretty annoying thing.

The PCB board’s circuits have been printed succesfully.

Carlos started to work with an Arduino and his IMU sensor (freeIMU 3.5 MS) but couldn’t run the examples available in the libraries, that should be solved quickly, as if we don’t get the sensor to work, the whole project dies! D=

That’s all (for now), have a nice day and stay tuned!

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s