Electronic Components

Quick Link - Common Laboratory Components

Please see room Bannan 218 for parts not listed.

Capacitor   |   Crystal   |   Hobby   |   Linear   |   Logic   |   Microprocessor   |   Optoelectronic   |   Oscillator    

Overcurrent Protection   |   Potentiometer-Trimmer   |   Resistor   |  SMD Codes  |  SMD Socket Adapters   

 Test Clips  |  Transistor-FET   |   Thermal Heat Sink 
 

Logic 74xxxx Series

References:

• http://en.wikipedia.org/wiki/List_of_7400_series_integrated_circuits  
• http://en.wikipedia.org/wiki/7400_series 

Microprocessor

EDN microprocessor/microcontroller directory 

PIC16F84A Datasheet   >Get Started with your first PIC program<
  

Linear ICs, Transistors, Active Components

Hobby

ISD7000 Datasheet Single Chip Voice Record and Playback.

More similar products-datasheets | other fab 

This is a very basic hobby project and can take less than an hour.

Optoelectronics

LED Polarity 

7-Segment Display 

> Datasheet <

Other reference: http://en.wikipedia.org/wiki/Seven-segment_display  

Capacitors

Capacitors having a value of about 0.47 micro-farad or greater are often Electrolytic or Tantalum (polarized) types. This means that it is very important how they are connected. Polarized capacitors are almost always marked with the polarity on the body of the component. If the two capacitor leads are of different lengths then the longer of the two is usually the + (positive) terminal. Only non-polarized capacitors may be fitted to the breadboard or PCB either way, in the same way as resistors.

Surest way to damage an electrolytic capacitor is to reverse polarity at working voltage, self-destruction will occur and violent.

IMPORTANT: Capacitors with values below 100 pf may be marked two ways: Either with just two digits (22 pF = "22") or three digits (22 pF = "220",). In the latter case the third digit signifies the number of zeros following the first two digits. "220" = 22 pF, "221" = 220 pF, "222" = 2200 pF.

Resistors, Potentiometers, & Trimmers 

References: http://en.wikipedia.org/wiki/Resistors  

Through-Hole Resistors 

Four-color-band axial resistors
Main article: Electronic color code
Four-band identification is the most commonly used color coding scheme on all resistors. It consists of four colored bands that are painted around the body of the resistor. The scheme is simple: The first two numbers are the first two significant digits of the resistance value, the third is a multiplier, and the fourth is the tolerance of the value. Each color corresponds to a certain number, shown in the chart below. The tolerance for a 4-band resistor will be 1%, 5%, or 10%

5-color-band axial resistors
5-band identification is used for higher precision (lower tolerance) resistors (1%, 0.5%, 0.25%, 0.1%), to notate the extra digit. The first three bands represent the significant digits, the fourth is the multiplier, and the fifth is the tolerance. 5-band standard tolerance resistors are sometimes encountered, generally on older or specialized resistors. They can be identified by noting a standard tolerance color in the 4th band. The 5th band in this case is the temperature coefficient
 

Surface Mount Resistors (SMT)

SMT resistors
This image shows two surface mount resistors
Surface mounted resistors are printed with numerical values in a code related to that used on axial resistors. Standard-tolerance Surface Mount Technology (SMT) resistors are marked with a three-digit code, in which the first two digits are the first two significant digits of the value and the third digit is the power of ten (the number of zeroes).

For example:
"334" = 33 × 10,000 ohms = 330 kiloohms
"222" = 22 × 100 ohms = 2.2 kiloohms
"473" = 47 × 1,000 ohms = 47 kiloohms
"105" = 10 × 100,000 ohms = 1 megaohm

Resistances less than 100 ohms are written: 100, 220, 470. The final zero represents ten to the power zero, which is 1. For example:
"100" = 10 × 1 ohm = 10 ohms
"220" = 22 × 1 ohm = 22 ohms
Sometimes these values are marked as "10" or "22" to prevent a mistake.

Resistances less than 10 ohms have 'R' to indicate the position of the decimal point (radix point). For example: "R003" = 0.003 ohms. This is very small value, generally used in current sense applications.
"4R7" = 4.7 ohms
"0R22" = 0.22 ohms
"0R01" = 0.01 ohms
 

Precision resistors are marked with a four-digit code, in which the first three digits are the significant figures and the fourth is the power of ten. For example:
"1001" = 100 × 10 ohms = 1 kiloohm
"4992" = 499 × 100 ohms = 49.9 kiloohm
"1000" = 100 × 1 ohm = 100 ohms
 

"0", "000", and "0000" sometimes appear as values on surface-mount zero-ohm links, since these have (approximately) zero resistance.
 

Potentiometer - Trimmers

References: http://en.wikipedia.org/wiki/Potentiometer  

	Precision Multi-Turn

Crystals & Oscillators

References: http://en.wikipedia.org/wiki/Crystal_oscillator  

Manufactures: www.foxonline.com | www.ecsxtal.com  

Crystals 

Through-Hole	SMT

Oscillators 

Through-Hole	SMT

SMD Code Database

: http://embedeo.com/smd_codes/ 

SMD Socket Adapters & Test Clips

• www.ironwoodelectronics.com 
• www.tek.com 
• www.emulation.com 
• www.mill-max.com