Complete your daily Safe Start Health Check screening.
Please see room Bannan 218 for parts not listed.
Capacitor  Crystal  Hobby  Linear  Logic  Microprocessor  Optoelectronic  Oscillator
Overcurrent Protection  PotentiometerTrimmer  Resistor  SMDCodes  SMD Socket Adapters
Test Clips  TransistorFET  Thermal Heat Sink
An overcurrent event or fault is when the current (amperage) in an electrical circuit exceeds the rated capacity. There are many possible sources for an overcurrent fault such as a short, power cross, surge, etc. These faults can permanently damage the followon electronics and may cause serious injury.
2. http://www.circuitcalculator.com/wordpress/2007/02/16/pcbthermalcopperarea/
Aavid Applications Engineering Support
Aavid Thermalloy engineers can assist with the design of heat sinks for both forced and natural convection applications. Frequently we have already encountered a situation similar to yours and may have a solution readily available. If not, we will start from scratch and help you design a cooling strategy uniquely tailored for your application. www.aavidthermalloy.com
Need to find a part? Try these search engines for parts or try the online distributors listed below.
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74ls00c224 Quad 2 input NAND gate 
74ls85a3e6 4 bit magnitude comparator 
741763316 Decade Counter 
74ls014aba Quad 2 input NAND gate (OC) 
74ls863e01 Quad 2 input XOR gate 
741763316Binary Counter 
74ls02f56e Quad 2 input NOR gate 
74ls90092e Decade counter 
74ls191d1e4 4 bit binary up / down counter 
74ls035b67 Quad 2 input NAND gate (OC) 
74LS91 8bit shift register 
74ls192690d BCD up / down counter 
74ls04505f Hex Inverter 
74ls90092e Divide by 12 counter 
74ls192690d 4 bit binary up / down counter 
74ls05ecc6 Hex Inverter (OC) 
74ls90092e 4bit Binary counter 
74ls195ebfd 4 bit shift register 
74ls066457 Hex Inverter buffer/driver 
74ls95da42 4bit shift register 
74ls19679b9 Presettable decade counter 
74ls08eb48 Quad 2 input AND 
74ls1072c09 Dual JK flipflops with clear 
74ls19679b9 Presettable binary counter 
74ls0961a1 Quad 2 input AND gate (OC) 
74ls1094a62 Dual JK pos edge trig flip flop 
74199 8bit shift register 
74ls103cf7 Triple 3 input NAND gate 
74ls112c884 Dual JK neg edge trig flip flop 
74ls2211bdb Dual monostable multivibrator 
74ls111b94 Triple 3 input AND gate 
741217bd2 Monostable multivibrator 
74s225d730 16x5 FIFO memory 
74ls129d48 Triple 3 input NAND gate (OC) 
74ls1231d89 Retriggerable Monostable multivibrator 
74ls240fdd2 Octal buffer/line driver 
74ls1308c8 Dual 4input NAND gate Schmitt trigger 
74ls1231d89 Retriggerable Monostable multivibrator 
74ls2413040 Octal 3state buffer 
74ls14cff4 Hex Inverter Schmitt trigger 
74ls12576fe Quad 3state Buffer 
74ls240fdd2 Octal buffer/line driver 
74ls153314 Triple 3 input AND gate (OC) 
74ls132dc34 Quad 2 input NAND gate Schmitt trigger 
74ls2458a9d Octal bus transceiver 
74ls164b63 Hex Inverter (OC) 
74ls133d5c7 13 input NAND 
74ls2517bfc Data selector / MUX 
74LS20 Dual 4 input NAND gate 
74ls13656d0 Quad 2 input XOR (O.C) 
74ls2578e23 Quad 2 input mux 3state 
74ls21590f Dual 4 input AND gate 
74ls138f9da 3to8 line decoder/demux 
74ls2595194 8 bit addressable latch 
74ls2263b6 Dual 4 input NAND gate (OC) 
74ls13969bd Dual 1of4 decoder/demux 
74ls2664e75 Quad 2 input XNOR (O.C) 
7425fec4 Dual 4 input NOR gate with strobe 
74ls138f9da 10 line  4 line octal priority encoder 
74ls2736608 Octal D type flip flop with clear 
74ls278351 Triple 3 input NOR gate 
74ls138f9da 8 line  3 line octal priority encoder 
74ls2803836 9 bit odd / even parity generator 
7425fec4 8 input NAND gate 
74150e6fc Data selector/mux 
74ls298d54b Quad 2 input MUX with storage 
74ls329bf4 Quad 2 input OR gate 
74ls1516d03 8 input MUX 
74ls299a5ff 8 bit universal shift register 
74ls387b99 Quad 2 input NAND gate Buffer (OC) 
74ls1533494 Dual 4to1 Multiplexer 
74ls3231687 8Bit Shift register 
74ls42b427 BCD to DEC decoder 
74ls1545606 4to16 decoder/demux 
74ls367749c Hex bus driver 
7445ec4e BCD to DEC decoder 
74ls15502c0 Dual 2 line to 4 line decoder / demux 
74ls367749c Hex bus driver with invereters 
74ls472c1d BCD to 7 seg decoder/driver (OC) 
74ls15502c0 Dual 2 line to 4 line decoder / demux (O.C) 
74ls373bbae Octal transparent latch 
74ls4804d2 BCD to 7 seg decoder/driver (OC) 
74ls1570797 Quad 2 input MUX 
74ls373bbae Octal D type flip flop 3state 
74ls51049a AND/OR/INVERT gate 
74ls1570797 Quad 2 input MUX with invereted outputs 
74ls39042d4 Dual 4 bit decade counter 
74ls54c552 4wide AND/OR/INVERT gate 
74ls1609042 BCD decade counter 
74ls393ba36 Dual 4 bit binary counter 
74F64 Pos 4232 input AND/OR/INVERT gate 
74ls1611432 Synchronous 4 bit binary counter 
74ls3955a71 4 bit shift register 
7470a48b JK flip flop 
74ls162d21a BCD decade counter 
74ls5404cc0 Octal buffer 3state 
7472ac65 JK M/S flip flop 
74ls1611432 Asynchronous 4 bit binary counter 
74ls5404cc0 Octal buffer 3state outputs 
74ls73e711 Dual JK flip flop with clear 
74ls164e63f 8 bit SIPO shift register 

74ls74b7dc Dual DType flipflops with preset and clear 
74ls1657c21 8 bit PISO shift register 

74ls756fbe 4 bit bistable latch 
74ls166ee58 8 bit PISO shift register 

74ls76b646 Dual JK flipflops with preset and clear 
74ls1743432 Hex D type flip flop with clear 

74ls83b778 4 bit full adder 
74ls1743432 Quad D type flip flop with clear 
EDN microprocessor/microcontroller directory
PIC16F84A3fcb Datasheet Get Started with your first PIC program
55549f7 Timer / Oscillator 
LM741e968 OpAmp 
uaf42985d Universal Active Filter 
PN2222ANPN77c0 NPN Transistor  2N3904NPN51b1 NPN Transistor  2N3906PNP082d PNP Transistor 
mpq222210c1 NPN Transistor  MPQ2907AQUADPNP4910 PNP Transistor  2N3819 JFETdeb3 JFET 
NDP6060L5503 
NDP6020P6240 
ISD1700h40f9 Single Chip Voice Record and Playback.
More similar productsdatasheets  other fab
This is a very basic hobby project and can take less than an hour.
LED Polarity
7Segment Display
Other reference: http://en.wikipedia.org/wiki/Sevensegment_display
Polarized Capacitors
WARNING
REVERSE POLARITY OF ELECTROLYTIC & TANTALUM CAPACITORS CAN CAUSE
FIRE & EXPLOSION
Capacitors having a value of about 0.47 microfarad 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 nonpolarized 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, selfdestruction will occur and violent.
Use safety glasses and keep eyes and body parts away when applying power for the first time to a circuit that includes polarized capacitors. Discard any damaged parts.
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.
VALUE  MARKING  VALUE  MARKING  VALUE  MARKING 

1pf; 3pf; 5pf  1; 3; 5 
2.7, 3 or 3.3 pF can be interchanged with each other. 4.7 or 5 pF can be interchanged with each other. 
2.7, 3 or 3.3 pF can be interchanged with each other. 4.7 or 5 pF can be interchanged with each other. 
2.7, 3 or 3.3 pF can be interchanged with each other. 4.7 or 5 pF can be interchanged with each other. 
2.7, 3 or 3.3 pF can be interchanged with each other. 4.7 or 5 pF can be interchanged with each other. 
10 pf  10or 100  0.001 uF  102  0.10 uF  104 
12 pf  12or 120  0.0012uF (1200pf)  122  0.12 uF  124 
15 pf  15or 150  0.0015uF  152  0.15 uf  154 
18or 180  0.0018 uF (1800pf)  182  0.18 uF  184  
22 pf  22or 220  0.0022uF  222  0.22 uF  224 
27 pf  27or 270  0.0027uF  272  0.27 uF  274 
33 pf  33or 330  0.0033 uF  332  0.33 uF  334 
39 pf  39or 390  0.0039uF  392  0.39 uF  394 
47 pf  47or 470  0.0047uF  472  0.47 uF  474 
58 pf  58or 580  0.0056uF  562  0.56 uF  564 
68 pf 
68or 680 
0.0068uF  682  0.68 uF  684 
82 pf  82or 820  0.0082uF  822  0.82 uF  824 
100 pf  101  0.01 uF  103  1uF  105 or 1uf 
120 pf  121  0.012 uF  123  
150 pf  151  0.015 uF  153  
180 pf  181  0.018 uF  183  
220 pf  221  0.022 uF  223  
270 pf  271  0.027 uF  273  
330 pf  331  0.033 uF  333  
390 pf  391  0.039 uF  393  
470 pf  471  0.047 uF  473  
560 pf  561  0.056 uF  563  
680 pf  681  0.068 uF  683  
820 pf  821  0.082 uF  823 
References: http://en.wikipedia.org/wiki/Resistors
ThroughHole Resistors
Fourcolorband axial resistors
Main article: Electronic color code
Fourband 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 4band resistor will be 1%, 5%, or 10%
5colorband axial resistors
5band 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. 5band 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
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. Standardtolerance Surface Mount Technology (SMT) resistors are marked with a threedigit 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 fourdigit 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 surfacemount zeroohm links, since these have (approximately) zero resistance.
References: http://en.wikipedia.org/wiki/Potentiometer
References: http://en.wikipedia.org/wiki/Crystal_oscillator
Manufactures: www.foxonline.com  www.ecsxtal.com
Crystals
Oscillators
: http://embedeo.com/smd_codes/