Hola, buenos días.
Soy nuevo en el foro. Primero muchas gracias por dedicarle tu tiempo a ayudarme. Voy a tratar de ser lo mas sintético posible.
Estoy queriendo regular el voltaje de una fuente de 15v 3a por medio de un modulo driver Mosfet IRF520 conectado a un Arduino UNO.
Realizo la conexión como en esta imagen ( adjunto la encontraran tal cual lo tengo):
Estoy usando este código:
int MOSFET = 3; // LAMPARA en pin 3
int BRILLO;
int POT = 0; // potenciometro en pin A0
void setup(){
pinMode(LAMP, OUTPUT); // pin 3 como salida
}
void loop(){
BRILLO = analogRead(POT) / 4;
analogWrite(MOSFET, BRILLO);
}
Lo que me esta sucediendo es que al mover el potenciometro varia el voltaje de 14,78 a 15,13 ( Medido con voltimetro) Yo necesito que sea de 0v a 15v ( o de 2v a 15v, no necesariamente debe ser 0). Como logro eso? Estoy perdido.
Por la web encontré también que utilizan una librería, la HCMOTOR, ( IRF520 MOSFET Driver Module (HCMODU0083) - forum.hobbycomponents.com ) le cargue el ejemplo a arduino para probar y me sucede exactamente lo mismo ( Mismos valores de v). Dejo el código mas abajo.
Muchas gracias por su ayuda, la verdad estoy perdido.
DATE: 09/07/15
VERSION: 0.1
AUTHOR: Andrew Davies
This example uses the library to control a DC motor via a potentiometer connected
analogue pin A0. The motor should be connected to digital pin 7 on the Arduino
via a suitable transistor/driver module. Do not connect the motor directly as you
may damage your Arduino.
Note about driving more than one motor:
By default this library can drive up to 4 motors. However this can be increased by
editing the following line in the libraries HCMotor.h file:
#define MAXMOTORS 4 <-- change to match the number of motors you require.
If you are using less than 4 motors and your sketch is processor intensive you may
also want to reduce this value to match the number of motors you have attached as this
will free up processing cycles for your main loop.
You may copy, alter and reuse this code in any way you like, but please leave
reference to HobbyComponents.com in your comments if you redistribute this code.
This software may not be used directly for the purpose of selling products that
directly compete with Hobby Components Ltd's own range of products.
THIS SOFTWARE IS PROVIDED "AS IS". HOBBY COMPONENTS MAKES NO WARRANTIES, WHETHER
EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ACCURACY OR LACK OF NEGLIGENCE.
HOBBY COMPONENTS SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR ANY DAMAGES,
INCLUDING, BUT NOT LIMITED TO, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR ANY
REASON WHATSOEVER.
*/
/* Include the library */
#include "HCMotor.h"
/* Set the pin that will control the motor. Note that it doesn't have to be a PWM pin -
any digital pin will do! */
#define MOTOR_PIN 7
/* Set the analogue pin the potentiometer will be connected to. */
#define POT_PIN A0
/* Create an instance of the library */
HCMotor HCMotor;
void setup()
{
/* Initialise the library */
HCMotor.Init();
/* Attach motor 0 to digital pin 7. The first parameter specifies the
motor number, the second is the motor type, and the third is the
digital pin that will control the motor */
HCMotor.attach(0, DCMOTOR, MOTOR_PIN);
/* Set the duty cycle of the PWM signal in 100uS increments.
Here 100 x 100uS = 1mS duty cycle. */
HCMotor.DutyCycle(0, 100);
}
void loop()
{
int Speed;
/* Read the analogue pin to determine the position of the pot. The map
function takes this value which could be anywhere between 0 - 1024
and reduces it down to match the duty cycle range of 0 - 100 */
Speed = map(analogRead(POT_PIN), 0, 1024, 0, 100);
/* Set the on time of the duty cycle to match the position of the pot. */
HCMotor.OnTime(0, Speed);
}
