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Mr.Cricket
Joined: 20 Jan 2013
Posts: 2
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| Triac MOC3021 Driver |
 Posted: Sun Jan 20, 2013 11:06 am |
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Hi
I found this code on internet.
http://cboard.cprogramming.com/c-programming/136682-help-me-pls-thank-you.html
This is to control the speed of fan and intensity of light but the driver for triac moc3021 are missing. So I need drivers for moc 3021 one for fan and other for bulb.
The code is:
| Code: |
# include<16f72.h>
# use delay (clock=12000000)
# fuses hs, nowdt, protect
# use i2c(master, sda=PIN_c4, scl=PIN_c3)
# include <lcdb.c>
int temph , templ ;
int1 x=0 , y=0 ;
int m ;
# define zcd PIN_a4
# define pir PIN_B0
# define ldr PIN_a2
# define dim1 PIN_a0
# define dim2 PIN_a1
# include <temperature.c>
# include <dimmer1.c>
# include <dimmer2.c>
#INT_EXT Void main( )
{
Output_low(dim1) ;
Output_low(dim2) ;
X=0; Y=0;
Setup_adc_ports( NO_ANALOGS ) ;// All are digital only
temp_intit( ) ;
lcd_intit( ) ;
LCD_PUTC(“\f POWER SAVER”) ;
delay_ms(2000) ;
While(1)
{
If (! input(pir) )
{
output_high(dim1) ;
While(! input(pir) ){}
X=~x ;
LCD_PUTC(“\n PIR ON “) ;
Delay_ms(5000) ;
}
if(x == 0)
{
If(y == 1)
{
delay_ms(20000) ;
Y=0 ;
}
output_low(dim1) ;
output_low(dim2);
LCD_PUTC(“\n STAND BY “) ;
delay_ms (300);
}
if(x==1)
{
y=1;
temp_read ( );
if (templ==0x80) templ=5;
else templ=0;
printf(lcd_putc, ”\nTEMP: %02d.%d dc”, temph,templ) ;
if(temph>=27 && temph<=28 )
{
back25: if( ! input(zcd))goto back25; //waiting to get zero start
delay_ms(5);
output_high(dim2);
back26: if( ! input(zcd))goto back26; //waiting to get zero start
output_low(dim2);
delay_ms(5);
output_high(dim2);
back27: if( ! input(zcd))goto back27;
output_low(dim2);
}
if (temph>=29 && temph<=31 )
{
back20: if( ! input(zcd))goto back20; //waiting to get zero start
delay_ms(5); / / 161
output_high(dim2);
back30: if( ! input(zcd))goto back30; //waiting to get zero start
output_low(dim2);
delay_ms(5);
output_high(dim2);
back32: if( ! input(zcd))goto back32;
output_low(dim2);
}
if (temph>31 && temph<=33 )
{
back9: if( ! input(zcd))goto back9; //waiting to get zero start
delay_ms(5); // 161
output_high(dim2);
back10: if( ! input(zcd))goto back10; //waiting to get zero start
output_low(dim2);
delay_ms(5);
output_high(dim2);
back11: if( ! input(zcd))goto back11;
output_low(dim2);
}
if (temph>33 && temph<=35 )
{
back12: if( ! input(zcd))goto back12; //waiting to get zero start
delay_ms(3); / / 161
output_high(dim2);
back13: if( ! input(zcd))goto back10; //waiting to get zero start
output_low(dim2);
delay_ms(3);
output_high(dim2);
back14: if( ! input(zcd))goto back14;
output_low(dim2);
}
if (temph>35 && temph<=37 )
{
back15: if( ! input(zcd))goto back15; //waiting to get zero start
delay_ms(2);
output_high(dim2);
back16: if( ! input(zcd))goto back16; //waiting to get zero start
output_low(dim2);
delay_ms(2);
output_high(dim2);
back17: if( ! input(zcd))goto back17;
output_low(dim2);
}
if (temph>37) output_high(dim2) ;
if (input(ldr)) output_high(dim1) ;
if (! Input(ldr)) output_low(dim1) ;
}
}
}
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ckielstra
Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands
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| Posted: Mon Jan 21, 2013 4:04 am |
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Please get real! 
Did you even read the comments in the thread you linked to?
The code you posted is incomplete, not working and from another beginner in software who used a lot of bad habits (goto statements, to name one).
If you want to learn programming then start with the most basic project first: get a LED to blink.
Read the PIC datasheet
Read the CCS manual
Expand your LED blinking program in small steps that can all be tested:
- write to the LCD
- read temperature and display on LCD
- Add motor control
- Control motor speed based on temperature.
For each of these steps you can find example programs on this website and in the Application Notes on the Microchip website. Do one step at a time and only go to the next step when you have everything working. |
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Mr.Cricket
Joined: 20 Jan 2013
Posts: 2
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| Posted: Mon Jan 21, 2013 6:18 am |
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I have already starting learning programming.
But i m using triac as a dimmer and i need driver file for this i searched on google but didn't find one |
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SherpaDoug
Joined: 07 Sep 2003
Posts: 1640
Location: Cape Cod Mass USA
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| Posted: Mon Jan 21, 2013 6:34 am |
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What would you expect a "driver" for a Triac to do? I don't think there is a driver.
_________________
The search for better is endless. Instead simply find very good and get the job done. |
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Douglas Kennedy
Joined: 07 Sep 2003
Posts: 755
Location: Florida
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| Posted: Mon Jan 21, 2013 8:51 am |
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| The PIC needs code to make it work and a PC needs code as well. For PC coding little attention is made to hardware due to the driver layer provided by the PC manufacturer, the OS and the manufacturers of add on devices. The PIC is different it is very close to hardware so learning very much involves hardware. Take the need to control a triac. Learning is best done by building a simple circuit only involving a triac being switched on and off. Now you know what the pic will need to do. Assuming you learned with a PIC how to turn a simple led on or off the path ahead should now seem clear. |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19589
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| Posted: Mon Jan 21, 2013 9:08 am |
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Worth pointing out, that a TRIAC is just an on/off device. A pulse to the gate turns it on, and it then goes off at the next mains crossing, provided the gate is no longer driven. You can't turn it off (except for more exotic GTO devices). The way you 'dim', is by adjusting when you turn it on. Basically you need hardware to detect the zero crossing point on the mains cycle, and then all you do is adjust how long 'after' this, you send a pulse to the TRIAC to turn it on. Turn it on immediately after the zero crossing, and you have 'full power' leave turning it on till late in the mains cycle and you have a low power output.
Driving it is just down to adjusting the time. However you need the hardware to detect the mains cycle, to make it work.
Best Wishes |
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