Inmojo dimmer issues

1

I have an inmojo dimmer v2.0
http://www.inmojo.com/store/inmojo-market/item/digital-ac-dimmer-module-lite-v.2/

I have been trying to run the demo code but can’t get it to work. Please help. Here’s the code:

/*
AC Light Dimmer - Inmojo 
AC Voltage dimmer with Zero cross detection

Author: Charith Fernanado http://www.inmojo.com charith@inmojo.com 
License: Released under the Creative Commons Attribution Share-Alike 3.0 License. 
http://creativecommons.org/licenses/by-sa/3.0
Target: Arduino

Attach the Zero cross pin of the module to Arduino External Interrupt pin
Select the correct Interrupt # from the below table

Pin | Interrrupt # | Arduino Platform

2 | 0 | All
3 | 1 | All
18 | 5 | Arduino Mega Only
19 | 4 | Arduino Mega Only
20 | 3 | Arduino Mega Only
21 | 2 | Arduino Mega Only

*/

int AC_LOAD = A0; // Output to Opto Triac pin
int dimming = 128; // Dimming level (0-128) 0 = ON, 128 = OFF

void setup()
{
pinMode(AC_LOAD, OUTPUT);	 // Set the AC Load as output
attachInterrupt(A1, zero_crosss_int, RISING); // Choose the zero cross interrupt # from the table above
}

void zero_crosss_int() // function to be fired at the zero crossing to dim the light
{
// Firing angle calculation :: 60Hz-> 8.33ms (1/2 Cycle)
// (8333us - 8.33us) / 128 = 65 (Approx)
int dimtime = (65*dimming); 
delayMicroseconds(dimtime); // Off cycle
digitalWrite(AC_LOAD, HIGH); // triac firing
delayMicroseconds(8.33); // triac On propogation delay
digitalWrite(AC_LOAD, LOW); // triac Off
}

void loop()
{
dimming = 128; 
delay(500);
dimming = 75;
delay(500);
dimming = 25;
delay(500);

}
2

Do you have the inmojo dimmer v2.0 or something else?

3

I have an inmojo dimmer v2.0
http://www.inmojo.com/store/inmojo-market/item/digital-ac-dimmer-module-lite-v.2/

I have been trying to run the demo code but can’t get it to work. Please help. Here’s the code:

/*
 AC Light Dimmer - Inmojo 
 AC Voltage dimmer with Zero cross detection
 
 Author: Charith Fernanado http://www.inmojo.com charith@inmojo.com 
 License: Released under the Creative Commons Attribution Share-Alike 3.0 License. 
 http://creativecommons.org/licenses/by-sa/3.0
 Target:  Arduino
 
 Attach the Zero cross pin of the module to Arduino External Interrupt pin
 Select the correct Interrupt # from the below table

 Pin    |  Interrrupt # | Arduino Platform
 ---------------------------------------
 2      |  0            |  All
 3      |  1            |  All
 18     |  5            |  Arduino Mega Only
 19     |  4            |  Arduino Mega Only
 20     |  3            |  Arduino Mega Only
 21     |  2            |  Arduino Mega Only
 
 */

int AC_LOAD = A0;    // Output to Opto Triac pin
int dimming = 128;  // Dimming level (0-128)  0 = ON, 128 = OFF

void setup()
{
  pinMode(AC_LOAD, OUTPUT);	      // Set the AC Load as output
  attachInterrupt(A1, zero_crosss_int, RISING);  // Choose the zero cross interrupt # from the table above
}

void zero_crosss_int()  // function to be fired at the zero crossing to dim the light
{
  // Firing angle calculation :: 60Hz-> 8.33ms (1/2 Cycle)
  // (8333us - 8.33us) / 128 = 65 (Approx)
  int dimtime = (65*dimming);      
  delayMicroseconds(dimtime);    // Off cycle
  digitalWrite(AC_LOAD, HIGH);   // triac firing
  delayMicroseconds(8.33);         // triac On propogation delay
  digitalWrite(AC_LOAD, LOW);    // triac Off
}

void loop()
{
  dimming = 128; 
  delay(500);
  dimming = 75;  
  delay(500);
  dimming = 25;  
  delay(500);

}
4

@letter4vishal,

please try to post your questions on one same thread as posting duplicate only makes it harder for the community to provide advice.

I have shifted your other posts over here and formatted your code for easy reading :wink:

1.) Did you ever get it working on other platforms?

2.) How are you hooking up the board to the spark core?

You need to connect 4 pins:

    dimmer --> core
       Vcc --> 3.3v
Zero-cross --> A1
    Dimmer --> A0
       GND --> GND
1 Like
5

Thankyou. Well no. I don’t have any other platform other than the spark. Although I’ve seen online that most people get it to work on their Arduinos.

Yes This is exactly how I hooked it up.

6

@letter4vishal, I noticed that the “dimming” is being used in both loop() and the ISR zero_crosss_int(). Ideally, it should be declared as “volatile int dimmer” to avoid any problems. Note also that delayMicroseconds() takes an integer value so a value of 8.33 will be taken as 8. :smile: