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IRF520 MOSFET Driver Module (HCMODU0083) 
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Joined: Sun Aug 05, 2012 4:02 pm
Posts: 650
Post IRF520 MOSFET Driver Module (HCMODU0083)
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This little module (HCMODU0083) is a breakout board for the IFR520 MOSFET transistor. The module is designed to switch heavy DC loads from a single digital pin of your microcontroller. Its main purpose is to provide a low cost way to drive a DC motor for robotics applications, but the module can be used to control most high current DC loads. Screw terminals are provided to interface to your load and external power source. An LED indicator provides a visual indication of when your load is being switched.

If you are intending to use this module with an Arduino then please check out our HCMotor library. Links are below.



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Model number: HCMODU0083
Weight: 10g
Size: 33.5 x 25.5mm
Max load (drain) current: <5A
Output load voltage :0-24V
Input Voltage: 3.3V, 5V

Applications: LED lights, DC motors, miniature pumps, solenoid valves.




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Example Application:


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Code:
/* 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);
}



The above example demonstrates the use of the module and an Uno to control the speed of a DC motor via a potentiometer. See the links below for a library and example sketch.


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Attachment:
IFR520_Datasheet.pdf


The HCMotor Arduino library and example sketch can be downloaded from the software section of our support forum here: viewtopic.php?f=58&t=1870


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Tue Jul 14, 2015 10:47 am
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Joined: Thu Nov 24, 2016 4:28 pm
Posts: 2
Post Re: IRF520 MOSFET Driver Module (HCMODU0083)
Hello,

I've build the example, but it drops the voltage considerably when I add a little fan...

Without the fan attached, the voltage is 16V, but when connecting the fan, it drops to a little over 2V. Any ideas why? Without the MOSFET, the fan runs just fine on the power supply.

Thanks!


Thu Nov 24, 2016 4:34 pm
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Site Admin

Joined: Sun Aug 05, 2012 4:15 pm
Posts: 649
Post Re: IRF520 MOSFET Driver Module (HCMODU0083)
Quote:
Without the fan attached, the voltage is 16V, but when connecting the fan, it drops to a little over 2V.


In both cases where are you measuring the voltage? Also, on the module do you see an LED illuminated when the fan is connected?

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Fri Nov 25, 2016 11:07 am
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Joined: Thu Nov 24, 2016 4:28 pm
Posts: 2
Post Re: IRF520 MOSFET Driver Module (HCMODU0083)
Hi Andrew,

Thought I deleted my post, guess not ... :|

Build another setup with another board - that worked fine - it was the board. All working fine now, monitoring the temp in my AV closet, turning on the fans, as well as resetting my router each week to clear it out.

Thanks!


Fri Nov 25, 2016 4:08 pm
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Joined: Thu Jul 27, 2017 11:12 am
Posts: 2
Post Re: IRF520 MOSFET Driver Module (HCMODU0083)
I have 3 of these to power an LED strip. The strip has 4 pins. +12v and R, G and B which need to be pulled down to 0V to power each colour. Do you guys have a circuit diagram of the board you can share so that I can work out how to connect it? I would expect to supply +12 directly to the LED power bus and then connect each FET Source to the R, G, B pins to draw current through the LEDs, but I cannot work out how to achieve this with your boards...

Thanks,
Andy.


Thu Jul 27, 2017 11:20 am
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Site Admin

Joined: Sun Aug 05, 2012 4:15 pm
Posts: 649
Post Re: IRF520 MOSFET Driver Module (HCMODU0083)
I've added a schematic to the first post. Hopefully this will help you work out how you can connect your LED strips. I don't know anything about your strips as we don't stock them so take my suggestion with caution, but it looks to me that you will need to connect the R, G, or B of your strip to the V- on the module and GND of your supply to GND of the module. Then you can turn on the LEDs by pulling the SIG pin high.

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Thu Jul 27, 2017 3:07 pm
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Joined: Thu Jul 27, 2017 11:12 am
Posts: 2
Post Re: IRF520 MOSFET Driver Module (HCMODU0083)
Perfect :-) thanks for your help


Thu Jul 27, 2017 8:44 pm
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