|
|
Author
|
Topic: Brain schematic
|
|
|
|
|
|
|
|
|
|
Phil Hill
I love my cootie bug
Posts: 7595
From: Hollywood, CA USA
Registered: Mar 2000
|
posted 02-20-2002 01:19 AM
Actually a DIAC is two diodes back to back and is used to prevent false triggering of a SCR or TRIAC. A TRIAC is basically 2 SCRs back-to-back so as to pass both halves of the ac waveform. A SCR is a controlled rectifier and as such only passes half of the ac waveform. Depending on the manufacturer and load requirements, a dimmer may use either a TRIAC or 2 back-to-back SCRs with the same results. It has nothing to do with cost. Also, a Zener diode, the one that has the wavey cathode line and is biased backwards (cathode to +), is a constant voltage device. It is installed on a regulated supply line with a specific value series resistor to form a voltage divider network. It is rated in watts like the resistor. Thus it provides a constant voltage with changing current requirements and therefore must dissipate the excess voltage like a resistor as heat. >>> Phil
| IP: Logged
|
|
|
|
|
|
All times are Central (GMT -6:00)
|
|
Powered by Infopop Corporation
UBB.classicTM
6.3.1.2
The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion
and agrees to release the authors from any and all liability.
|