Difference between revisions of "Resistors"

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[[Image:Resistors.jpg|thumb|Examples of resistors.]]
 
[[Image:Resistors.jpg|thumb|Examples of resistors.]]
 
== Identification ==
 
== Identification ==
−
Resistors' values are shown on the resistor in a  
+
Resistors' values are shown on the resistor, coded in a series of colored bands.
 +
 
 +
The resistors in labs here in Pratt are almost all 5% resistors or 1% resistors. That is, their actual values are either are guaranteed to be within 5% or 1% of the nominal, or labeled value.
 +
 
 +
The 5% resistors have three bands showing their value: two significant figures, and then the number of zeros.
 +
 
 +
The 1% resistors have four bands showing their value: three significant figures, and then the number of zeros.
 +
 
 +
 
 +
 
 +
{| class="wikitable"
 +
!Color!!1<sup>st</sup> band!!2<sup>nd</sup> band!!3<sup>rd</sup> band (multiplier)!!4<sup>th</sup> band (tolerance)
 +
|- style="background:black; color:white"
 +
| <font color=white>Black</font> ||0||0||&times;10<sup>0</sup>||
 +
|- style="background:#654321; color:white"
 +
|<font color=white>Brown</font>  ||1||1||&times;10<sup>1</sup> ||±1% (F)
 +
|- style="background:#e02410; color:black"
 +
|<font color=black>Red</font>    ||2||2||&times;10<sup>2</sup> ||±2% (G)
 +
|- bgcolor = "#FF7F00"
 +
|Orange                          ||3||3||&times;10<sup>3</sup> ||   
 +
|- bgcolor = "#FFFF00"
 +
|Yellow                          ||4||4||&times;10<sup>4</sup> ||
 +
|- bgcolor = "#228b22"
 +
|Green                          ||5||5||&times;10<sup>5</sup> ||±0.5% (D)
 +
|- style="background:#0000CD; color:white"
 +
|Blue                            ||6||6||&times;10<sup>6</sup> ||±0.25% (C)
 +
|- style="background:#9400D3; color:white"
 +
|Violet                          ||7||7||&times;10<sup>7</sup> ||±0.1% (B)
 +
|- style="background:#808080; color:white"
 +
|Gray                            ||8||8||&times;10<sup>8</sup> ||±0.05% (A)
 +
|- bgcolor = "#FFFFFF"
 +
|White                          ||9||9||&times;10<sup>9</sup> ||     
 +
|- bgcolor = "#D4AF37"
 +
|Gold                            || || ||&times;10<sup>-1</sup>||±5% (J) 
 +
|- bgcolor = "#C0C0C0"
 +
|Silver                          || || ||&times;10<sup>-2</sup>||±10% (K)
 +
|-
 +
|None                            || || ||                      ||±20% (M)
 +
|}
  
  
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|}
 
|}
  
−
5% resistor Standard Values
+
5% Resistor Standard Values
−
{|
+
{|class="wikitable"
 
|-
 
|-
−
10 ||11 ||12 ||13 ||15 ||16 ||18 ||20 ||22 ||24 ||27 ||30||
+
|10 ||11 ||12 ||13 ||15 ||16 ||18 ||20 ||22 ||24 ||27 ||30
 
|-
 
|-
−
33 ||36 ||39 ||43 ||47 ||51 ||56 ||62 ||68 ||75 ||82 ||91||
+
|33 ||36 ||39 ||43 ||47 ||51 ||56 ||62 ||68 ||75 ||82 ||91
 
|}
 
|}
  
 +
1% Resistor Standard Values
 +
{| class="wikitable"
 +
|-
 +
|100 || 102||  105||  107||  110 || 113||  115||  118
 +
|-
 +
|121 || 124 || 127 || 130||  133 || 137||  140 || 143
 +
|-
 +
|147 || 150||  154||  158 || 162 || 165 || 169 || 174
 +
|-
 +
|178 || 182 || 187 || 191||  196 || 200 || 205||  210
 +
|-
 +
|215||  221||  226||  232 || 237 || 243 || 249 || 255
 +
|-
 +
|261 || 267 || 274 || 280 || 287||  294 || 301 || 309
 +
|-
 +
|316 || 324||  332 || 340 || 348 || 357 || 365||  374
 +
|-
 +
|383 || 392||  402||  412 || 422 || 432||  442||  453
 +
|-
 +
|464||  475 || 487||  499||  511||  523||  536 || 549
 +
|-
 +
|562||  576 || 590 || 604 || 619||  634 || 649||  665
 +
|-
 +
|681||  698||  715 || 732 || 750||  768 || 787||  806
 +
|-
 +
|825||  845||  866||  887 || 909||  931 || 953 || 976
 +
|}
 
== Use ==
 
== Use ==
  

Revision as of 21:34, 16 February 2009

Resistors are passive electronic components.

Examples of resistors.

Identification

Resistors' values are shown on the resistor, coded in a series of colored bands.

The resistors in labs here in Pratt are almost all 5% resistors or 1% resistors. That is, their actual values are either are guaranteed to be within 5% or 1% of the nominal, or labeled value.

The 5% resistors have three bands showing their value: two significant figures, and then the number of zeros.

The 1% resistors have four bands showing their value: three significant figures, and then the number of zeros.


Color 1st band 2nd band 3rd band (multiplier) 4th band (tolerance)
Black 0 0 ×100
Brown 1 1 ×101 ±1% (F)
Red 2 2 ×102 ±2% (G)
Orange 3 3 ×103
Yellow 4 4 ×104
Green 5 5 ×105 ±0.5% (D)
Blue 6 6 ×106 ±0.25% (C)
Violet 7 7 ×107 ±0.1% (B)
Gray 8 8 ×108 ±0.05% (A)
White 9 9 ×109
Gold ×10-1 ±5% (J)
Silver ×10-2 ±10% (K)
None ±20% (M)


Color 1st band 2nd band 3rd band (multiplier) 4th band (tolerance) Temp. Coefficient
Black 0 0 ×100
Brown 1 1 ×101 ±1% (F) 100 ppm
Red 2 2 ×102 ±2% (G) 50 ppm
Orange 3 3 ×103 15 ppm
Yellow 4 4 ×104 25 ppm
Green 5 5 ×105 ±0.5% (D)
Blue 6 6 ×106 ±0.25% (C)
Violet 7 7 ×107 ±0.1% (B)
Gray 8 8 ×108 ±0.05% (A)
White 9 9 ×109
Gold ×10-1 ±5% (J)
Silver ×10-2 ±10% (K)
None ±20% (M)

5% Resistor Standard Values

10 11 12 13 15 16 18 20 22 24 27 30
33 36 39 43 47 51 56 62 68 75 82 91

1% Resistor Standard Values

100 102 105 107 110 113 115 118
121 124 127 130 133 137 140 143
147 150 154 158 162 165 169 174
178 182 187 191 196 200 205 210
215 221 226 232 237 243 249 255
261 267 274 280 287 294 301 309
316 324 332 340 348 357 365 374
383 392 402 412 422 432 442 453
464 475 487 499 511 523 536 549
562 576 590 604 619 634 649 665
681 698 715 732 750 768 787 806
825 845 866 887 909 931 953 976

Use

Questions

Post your questions by editing the discussion page of this article. Edit the page, then scroll to the bottom and add a question by putting in the characters *{{Q}}, followed by your question and finally your signature (with four tildes, i.e. ~~~~). Using the {{Q}} will automatically put the page in the category of pages with questions - other editors hoping to help out can then go to that category page to see where the questions are. See the page for Template:Q for details and examples.

External Links

References

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