J
Jerry Girard
- Jan 1, 1970
- 0
Okay, so I asked anyone a few months ago for a schematic of a Christmas
light crossfader using discrete components. Instead, I took several
people's advice and built it using a PIC chip. I did it for the capability
of added features. Anyway, I have the circuit functioning except for one
problem. Please see link to schematic:
http://www.lillyct.com/fader.gif
There are two channels that crossfade back-and-forth between each other
evenly. When cross fading, I am getting cross firing of the adjacent triac
which is causing a random flicker. When I disable one triac or pull off its
load, the other fires perfectly at a nice steady fading rate. With both
loads enabled, I get random flicker. They seem to be doing it on the
negative phase cycle.
I am using Teccor L4004L3 sensitive gate triacs. In the code, I either
tri-state of logic-high the port pins to fire. My layout seems sound. Are
there some additional components I should be using to prevent cross talk?
Thanks.
light crossfader using discrete components. Instead, I took several
people's advice and built it using a PIC chip. I did it for the capability
of added features. Anyway, I have the circuit functioning except for one
problem. Please see link to schematic:
http://www.lillyct.com/fader.gif
There are two channels that crossfade back-and-forth between each other
evenly. When cross fading, I am getting cross firing of the adjacent triac
which is causing a random flicker. When I disable one triac or pull off its
load, the other fires perfectly at a nice steady fading rate. With both
loads enabled, I get random flicker. They seem to be doing it on the
negative phase cycle.
I am using Teccor L4004L3 sensitive gate triacs. In the code, I either
tri-state of logic-high the port pins to fire. My layout seems sound. Are
there some additional components I should be using to prevent cross talk?
Thanks.