Tunnistaminen - Revision history

Syke: /* Resistor */

2009-11-20T11:03:42Z

‎Resistor

Syke: /* Resistor */

2009-11-20T10:58:30Z

‎Resistor

Syke: /* Resistor marking */

2009-11-20T10:57:58Z

‎Resistor marking

Syke: /* Resistor */

2009-11-20T10:57:12Z

‎Resistor

Show changes

Syke: /* Inductor */ + Resistor

2009-11-20T10:56:57Z

‎Inductor: + Resistor

Syke: /* Zener Diodes */

2009-11-20T10:10:26Z

‎Zener Diodes

Syke at 10:09, 20 November 2009

2009-11-20T10:09:56Z

Syke at 10:09, 20 November 2009

2009-11-20T10:09:19Z

Syke: /* Inductor */

2009-11-20T09:46:34Z

‎Inductor

Syke: /* Inductor */

2009-11-20T09:46:18Z

‎Inductor

@@ Line 1: / Line 1: @@
 ==Resistor==
 Source: Wikipedia [http://en.wikipedia.org/wiki/Resistor]
 === Resistor marking ===

@@ Line 1: / Line 1: @@
 ==Resistor==
-[http://en.wikipedia.org/wiki/Resistor]
+Source: Wikipedia [http://en.wikipedia.org/wiki/Resistor]
 === Resistor marking ===

@@ Line 2: / Line 2: @@
 [http://en.wikipedia.org/wiki/Resistor]
-== Resistor marking ==
+=== Resistor marking ===
 Most axial resistors use a pattern of colored stripes to indicate resistance. [[Surface-mount]] resistors are marked numerically, if they are big enough to permit marking; more-recent small sizes are impractical to mark.  Cases are usually tan, brown, blue, or green, though other colors are occasionally found such as dark red or dark gray.
@@ Line 8: / Line 8: @@
 Early 20th century resistors, essentially uninsulated, were dipped in paint to cover their entire body for color coding. A second color of paint was applied to one end of the element, and a color dot (or band) in the middle provided the third digit. The rule was "body, tip, dot", providing two significant digits for value and the decimal multiplier, in that sequence. Default tolerance was ±20%. Closer-tolerance resistors had silver (±10%) or gold-colored (±5%) paint on the other end.
-=== Four-band resistors ===
+==== Four-band resistors ====
 {{main|Electronic color code}}
@@ Line 50: / Line 50: @@
 There are many [[Electronic color code#Mnemonics|mnemonics for remembering these colors]].
-=== Preferred values ===
+==== Preferred values ====
 {{main|Preferred number}}
@@ Line 62: / Line 62: @@
 Earlier power wirewound resistors, such as brown vitreous-enameled types, however, were made with a different system of preferred values, such as some of those mentioned in the first sentence of this section.
-=== 5-band axial resistors ===
+==== 5-band axial resistors ====
 -band identification is used for higher [[Accuracy and precision|precision]] (lower tolerance) resistors (1%, 0.5%, 0.25%, 0.1%), to specify a third significant digit. The first three bands represent the significant digits, the fourth is the multiplier, and the fifth is the tolerance. Five-band resistors with a gold or silver 4th band are sometimes encountered, generally on older or specialized resistors. The 4th band is the tolerance and the 5th the temperature coefficient.
-===SMT resistors ===
+====SMT resistors ====
 [[Image:Zero ohm resistors cropped.jpg|thumb|This image shows four surface-mount resistors (the component at the upper left is a capacitor) including two [[zero-ohm resistor]]s. Zero-ohm links are often used instead of wire links, so that they can be inserted by a resistor-inserting machine. Of course, their resistance is finite, although quite low. ''Zero'' is simply a brief description of their function.]]
@@ Line 111: / Line 111: @@
 More recent surface-mount resistors are too small, physically, to permit practical markings to be applied.
-=== Industrial type designation ===
+==== Industrial type designation ====
 '''Format:'''''<nowiki>  [two letters]<space>[resistance value (three digit)]<nospace>[tolerance code(numerical - one digit)]

@@ Line 1: / Line 1: @@
 ==Inductor==
 Wikia article GFDL [http://howto.wikia.com/index.php?title=Howto_identify_inductor_markings]
@@ Line 114: / Line 118: @@
 *Inductor value = 47x10^0uH = 47uH
 **3rd band: silver = 10% tolerance
 ==Zener Diodes==

← Older revision		Revision as of 10:10, 20 November 2009
Line 119:		Line 119:


		+	===Markings on a circuit board===
		+	<gallery>
		+	Image:Zener diode symbol.svg
		+	Image:Zener diode symbol-2.svg
		+	</gallery>
		+
		+	{\|border="1"
		+	!Any diode
		+	!Specificly zener diode
		+	\|-
		+	\|D
		+	\|ZD
		+	\|-
		+	\|CR
		+	\|
		+	\|-
		+	\|
		+	\|
		+	\|}
		+
		+
		+	===Images===
		+	<gallery>
		+	Image:Zener diode photo.jpg
		+	Image:Zener diode photo2.jpg
		+	</gallery>
		+
		+	===Labeling on the diode===
		+	{\|cellspacing="10"
		+	!Part number labeled
		+	!Value Labeled
		+	\|-
		+	\|valign="top"\|
		+
		+	{\|border="1"
		+	!Label
		+	!Full part number
		+	\|-
		+	\|
		+	52<br />
		+	33<br />
		+	A
		+	\|1N5233A
		+	\|-
		+	\|
		+	1N<br />
		+	47<br />
		+	51
		+	\|1N4751
		+	\|}
		+	\|valign="top"\|
		+
		+	{\|border="1"
		+	!Label
		+	!Voltage
		+	\|-
		+	\|6.2
		+	\|6.2V
		+	\|-
		+	\|6•2
		+	\|6.2V
		+	\|-
		+	\|47
		+	\|47V
		+	\|}
		+	\|}

	==References==		==References==

@@ Line 114: / Line 114: @@
 *Inductor value = 47x10^0uH = 47uH
 **3rd band: silver = 10% tolerance
 ==References==
@@ Line 122: / Line 127: @@
 *[http://www.uoguelph.ca/~antoon/gadgets/coils/coils.html Inductor history]: includes color codes dot and striped
 [[Category:Alamonttu]]

← Older revision		Revision as of 10:09, 20 November 2009
Line 121:		Line 121:
	*[http://www.educypedia.be/electronics/datacomponent.htm Component codes]		*[http://www.educypedia.be/electronics/datacomponent.htm Component codes]
	*[http://www.uoguelph.ca/~antoon/gadgets/coils/coils.html Inductor history]: includes color codes dot and striped		*[http://www.uoguelph.ca/~antoon/gadgets/coils/coils.html Inductor history]: includes color codes dot and striped
		+
		+
		+	[[Category:Alamonttu]]

@@ Line 1: / Line 1: @@
 ==Inductor==
-[Wikia article GFDL http://howto.wikia.com/index.php?title=Howto_identify_inductor_markings]
+[[Wikia article GFDL http://howto.wikia.com/index.php?title=Howto_identify_inductor_markings]]
 [[Inductor]]s can be labeled with a number of different ways.  The most common are text codes and color codes.