TRIAC self-trigger

J

Jony130

Active Member

• Aug 1, 2010

• #1

I have this circuits



And the problem is in triac self-trigger when fridge turns on or off, the fluorescent lamp in the fridge will shine for a split second.
How can i fix this problem ?

 

Last edited: Aug 1, 2010

C

canadaelk

Active Member

• Aug 1, 2010

• #2

Where you in the fridge when you noticed that?
Maybe a small C (10 to 100 nF) after R3?

 

C

canadaelk

Active Member

• Aug 1, 2010

• #3

My bad:
Propably a resistor (10k-100k?) between pin 4 of OC1 and pin 2 of (I assume) JP1 should fix that problem. The gate of the triac is floating when the OC is off and any small static charge could trigger the triac, E

 

J

Jony130

Active Member

• Aug 2, 2010

• #4

Well I put this resistor between pin 4 of OC1 1K and nothing change.
I even install snubber RC but with now result.