zero crossing signal problem

nopes sir it didnt helped...i used bc547 npn transistor instead 3904 in zero circuit. this can be reason also..?

Zero crossing is used for phase shift control not PWM.

[/quote1352667653]

Good evening sir!

I'm having a similar problem with my zero crossing as it doesn't seem to work proper in Proteus. Seems like you are familiar with the program, and I've uploaded the sketch and code. Regards, Tor

Here is the code for the 8bit:

$regfile = "m8def.dat"
$crystal = 4000000

Config Pinb.0 = Input
Config Pinb.1 = Output                                      ' Gate Triac
Config Pind.7 = Input                                       ' Key Up
                                       ' Key Dn

Config Int0 = Rising
On Int0 Int0_int                                            ' Initialise the INT0 Interrupt


Enable Interrupts
Enable Int0


Dim E As Eram Byte
Dim B As Byte
Dim D As Byte

If E >
 9 Then E = 9
B = E
D = 0
Set Portb.1

Do

If Pind.7 = 0 Then
 If B >
 0 Then Decr B
 Waitms 10
 E = B
End If

If Pinb.0 = 0 Then
 If B < 9 Then Incr B
 Waitms 10
 E = B
End If



Loop

End                                                         ' end program

Int0_int:

Set Portb.1
For D = 0 To B
 Waitus 200
Next D
Reset Portb.1

Return

[Digital Dimmer]

i didnt get the code language...help me abt my code..where m doing mistake.

@TOR34:i didnt get the code language...help me abt my code..where m doing mistake.

@TOR34:i didnt get the code language...help me abt my code..where m doing mistake.

lucky6772

Code language isn't the problem, but connections in Proteus for this kind of solution

I'm having a similar problem with my zero crossing as it doesn't seem to work proper in Proteus. Seems like you are familiar with the program, and I've uploaded the sketch and code. Regards, Tor

Tor84

I think the problem is with Proteus and the shared grounds with live mains.
In the real circuit the mains neutral should not be connected to the circuit ground.
I suggest you use an opto isolator on your output.

I separated out the AC mains parts for testing, and your circuit /code works.

@expermentuk: sirr plz helpp mee withh myy codee nn circuitt also

ExperimenterUK,majoka: help me with my code and circuit also plz..!

Here's a simulation using the Fairchild's H11B1 as suggested by ExperimenterUK

can anybody tell me is my code approach is right or wrong.