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[9] [10] According to Bill Gutzwiller, the terms "SCR" and "controlled rectifier" were earlier, and "thyristor" was applied later, as usage of the device spread internationally. [ 11 ] SCRs are unidirectional devices (i.e. can conduct current only in one direction) as opposed to TRIACs , which are bidirectional (i.e. charge carriers can flow ...
The most common application is in dimmer switches for domestic lighting control. For industrial applications previously, extremely expensive and heavy multi-tapped transformers were used as the supplies for such elements, with the corresponding winding tap being connected to the element to produce the desired temperature. This limited the ...
This current is indicated in Figure 3 by a dotted red line and is the reason why a TRIAC needs more gate current to turn on than a comparably rated SCR. [3] Generally, this quadrant is the most sensitive of the four. This is because it is the only quadrant where gate current is injected directly into the base of one of the main device ...
A common dual dimmer module used in stage lighting A dimmer. A dimmer is a device connected to a light fixture and used to lower the brightness of the light.By changing the voltage waveform applied to the lamp, it is possible to lower the intensity of the light output.
AS 1103.2-1982 - "Diagrams charts and tables for electrotechnology, Part 2: Item Designation" (Superseded by AS 3702-1989.) AS 3702-1989 - "Item designation in electrotechnology". (Equivalent to IEC 60750 Edition 1.0, 1983.) IEC 113 (Superseded by IEC 750, i.e. IEC 60750.) IEC 750-1983 (AS 3702 is equivalent, but provides extra information.)
Many opto-TRIACs come with zero-cross circuits built in. They are often used to control larger, power TRIACs. In this setup TRIAC turn-on delays compound, so quick turn-on times are important. The corresponding phase-angle circuits are more sophisticated and more expensive than zero-cross circuits.
Wire crossover symbols for circuit diagrams. The CAD symbol for insulated crossing wires is the same as the older, non-CAD symbol for non-insulated crossing wires. To avoid confusion, the wire "jump" (semi-circle) symbol for insulated wires in non-CAD schematics is recommended (as opposed to using the CAD-style symbol for no connection), so as to avoid confusion with the original, older style ...
Typically a dimmer has a starting address that represents the lowest-numbered dimmer in that pack, and the addressing increases from there to the highest-numbered dimmer. As an example, for two packs of six dimmers each, the first pack would start at address 1 and the second pack at address 7. Each slot in the DMX512 packet corresponds to one ...