Transformation: GP39-2 From Shiny Brass to Grimy Green
#37
tomustang Wrote:Aren't the 0603 LEDs bluish? You have to watch that with LEDS since they won't resemble prototype lighting well.

The number indicates the physical device size, not a specific color, so you can get 0603 SMD LEDs in every color. 0603 is about .063" x .031" (yes, for whatever reason the specs are in English not Metric).

Copied from the wiki entry:

01005 (0402 metric) : 0.016" × 0.008" (0.4 mm × 0.2 mm) Typical power rating for resistors 1/32 watt
0201 (0603 metric) : 0.024" × 0.012" (0.6 mm × 0.3 mm) Typical power rating for resistors 1/20 watt
0402 (1005 metric) : 0.04" × 0.02" (1.0 mm × 0.5 mm) Typical power rating for resistors 1/16 watt
0603 (1608 metric) : 0.063" × 0.031" (1.6 mm × 0.8 mm) Typical power rating for resistors 1/16 watt
0805 (2012 metric) : 0.08" × 0.05" (2.0 mm × 1.25 mm) Typical power rating for resistors 1/10 or 1/8 watt
1206 (3216 metric) : 0.126" × 0.063" (3.2 mm × 1.6 mm) Typical power rating for resistors 1/4 watt
1210 (3225 metric) : 0.126" × 0.1" (3.2 mm × 2.5 mm) Typical power rating for resistors 1/2 watt
1808 (4516 metric) : 0.177" × 0.063" (4.5 mm × 1.6 mm)
1812 (4532 metric) : 0.18" × 0.12" (4.5 mm × 3.2 mm) Typical power rating for resistors 1/2 watt
2010 (5025 metric) : 0.2" × 0.1" (5.0 mm × 2.5 mm) Typical power rating for resistors 1/2 watt
2512 (6332 metric) : 0.25" × 0.12" (6.35 mm × 3.0 mm) Typical power rating for resistors 1 watt

--Randy
Modeling the Reading Railroad of the 1950's in HO

Visit my web site to see layout progress and other information:
http://www.readingeastpenn.com
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