You're right, A DC voltage applied to the gate will allow the TRIAC to
conduct in both directions as long as the applied voltage gets over
the threshold voltage. I guess I have just never used one like that
and did not think through the analogous SCR circuit well enough (duh).
That would mean that the output would always have a notch out of the
of the applied voltage waveform and that notch height would be equal
to the threshold voltage. The notch location would be determined by
the value of the DC gate voltage up the limit of 10V.
Is that right?
--- In Electronics_101@..., "Curtis Sakima" <csakima@m...>
wrote:
I dunno. If I recall correctly, a DC signal should work just fine.
You
just won't be using one of the quadrants that "every other Joe"
usually uses
(the negative MT/negative gate). You'd be using the negative
MT/POSITIVE
gate quadrant.
Curtis
Dazzle Mom this coming Mother's Day season with flowers!
----- Original Message -----
From: manifold <manifold_1@y...>
No, A DC gate signal will not 'turn on the TRIAC' it will only
rectify the
current to the load if the power source is from the AC mains. A
TRIAC is the
same as two reverse parallel SCRs. If a DC gate signal is applied,
only one
of the 'SCR halves' will ever turn on.
