Hi Matthias, Thanks for taking the time to show me this. Its starting to make some sense now. I have used google to search for information on how a triac works but have come up pretty short. Do you know of any links that give a pretty good description of their theory of operations I could review?
At 08:04 AM 2/13/03 -0800, Matthias Weingart wrote:
use courier font
+5V--R---+----+----
| |
zener |
| A2
----G Triac
| A1
C |
| |
GND------+----+----
zener cathode to +5V
C: 1nF
R: polyswitch
- on over-voltage a current of 10..50mA is flowing through zener->G->A1
(for a very short time)
- after firing of the triac, output voltage is 1-2 volts, the gate current
is zero, R is getting hot
- if the current is dropping below the hold current (10..200mA) the triac
is switching off, R is cooling down ...
M.
On Thu, Feb 13, 2003 at 06:14:03AM -0800, Robert Ritchey wrote:
> Hi Matthias,
> OK, I got the data sheet. Its still not clear to me if the zener goes
> between the gate and the 5V input or the gate and ground? Even
> with the data sheet I don't quite understand how a Triac works. I
> have looked through my books here and have not found a write-up
> on this. I don't understand how this is triggering using the zener.
> Thanks,
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