Multiple Ac dimmer with Zero crossing

I have problem I used this 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 = 3; // 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(0, 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 :: 50Hz-> 10ms (1/2 Cycle) // (10000us - 10us) / 128 = 75 (Approx) int dimtime = (75*dimming); delayMicroseconds(dimtime); // Off cycle digitalWrite(AC_LOAD, HIGH); // triac firing delayMicroseconds(10); // triac On propogation delay digitalWrite(AC_LOAD, LOW); // triac Off }

void loop() { dimming = 128; delay(100); dimming = 75; delay(100); dimming = 25; delay(100);

}

It work with 1 Module of dimmer but when I connect another dimmer and i develop this code I cant control 2 dimmer in the same time How can i control 2 dimmer with different firing angle time of triac in the same period of time

thank you all

i develop this code I cant control 2 dimmer in the same time

What happens when you try?

Attaching the triac to the other external interrupt pin isn't going to help (assuming a UNO or other 328-based Arduino).