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the design and construction of an electrophoresis machine
the design and construction of an electrophoresis machine

... of water (electroosmosis) associated with the movement of the clay particles. These observations are considered to be the origins of what we now call electrophoresis. In 1816 Porret quantified the flow of water (electroosmosis) through filter paper impregnated with egg albumin. Within a few years of ...
Pengolahan Sinyal Digital (Digital Signal Processing)
Pengolahan Sinyal Digital (Digital Signal Processing)

... values.[3] These values represent the information that is being processed. In the vast majority of cases, binary encoding is used: one voltage (typically the more positive value) represents a binary '1' and another voltage (usually a value near the ground potential, 0 V) represents a binary '0'. Dig ...
led high power
led high power

led high power - Mouser Electronics
led high power - Mouser Electronics

... moisture sensitive product is important to ensure the reliability of the product. The package is sealed: The LEDs should be s tored at 30°C or less and 85%RH or less. And the LEDs are limited to use within one year, while the LEDs is packed in moisture-proof package with the desiccants inside. The p ...
PSPICE Tutorial
PSPICE Tutorial

... • Now start placing components and connecting them (this part is quite similar to what you have done in last semester’s lab) Add a library as per the requirement for eg. here analog library has been added ...
Series wiring means that the devices are connected in such a way
Series wiring means that the devices are connected in such a way

... receives current as if the other were not present. This results in the equivalent resistance being less than either resistance R1 or R2. 1/RP = 1/R1 + 1/R2 + etc. ...
capacitors1 (1)
capacitors1 (1)

Circuits with Troubleshooting
Circuits with Troubleshooting

chapter26_2class
chapter26_2class

... circuit, electrons are transferred from the left plate of C1 to the right plate of C2 through the battery As this negative charge accumulates on the right plate of C2, an equivalent amount of negative charge is removed from the left plate of C2, leaving it with an excess positive charge All of the r ...
Assemble Manual - DIY, audio, electronics
Assemble Manual - DIY, audio, electronics

... while the negative is usually round. On the capacitor, the negative side is usually printed and the positive lead is longer than the negative. Solder C2 (for the +5V supply). 6. Solder the diodes in place. The diodes are for overshoot protection of the speaker outputs. These diodes are surface mount ...
Resonant circuits – measuring inductance
Resonant circuits – measuring inductance

... We will use C = 2.2 nF and R = 24.9 kΩ. The output signal u2 will be quite small when the frequency is far from f0. But if you vary the frequency with a modest speed it is not difficult to find the interesting frequency interval to study. Carry out the measurements and calculate the actual inductanc ...
The Background of an Electrocardiogram
The Background of an Electrocardiogram

Skill Sheet 7-A Using an Electric Meter
Skill Sheet 7-A Using an Electric Meter

... 8. You suspect that a wire is defective but can't see a break in it. Explain how measuring the resistance of the wire can tell you if it has a break. ...
High Temperature Specific Components
High Temperature Specific Components

Fisher 500C Capacitor Board
Fisher 500C Capacitor Board

... over the board. The exposed parts with start to dissolve. The emulsion is green and it will wash away exposing the copper underneath. This is the tricky part. The board must be removed when all the emulsion is off the exposed areas. If the board is removed too soon, the emulsion won’t be completely ...
T ; DC P
T ; DC P

... 4. The idea of equivalent resistance is that, as viewed from the external terminals, a circuit consisting of a number of interconnected resistors can be replaced by one equivalent resistor having a value equal to the combined effect of all the original resistors. At the external terminals, this equi ...
  Owner’s Manual – Revision 1.4  for  µSC ‘Micro String Controller’ Version 1 
  Owner’s Manual – Revision 1.4  for  µSC ‘Micro String Controller’ Version 1 

... Revision 1.4 – 8/10/2014                                                                                                                Back to Contents  ...
ACT45B - EPCOS
ACT45B - EPCOS

... varnish agent that is used has a negative effect on the wire insulation, any plastics that are used, or on glued joints. In particular, it is possible for washing varnish agent residues to have a negative effect in the long-term on wire insulation. Washing processes may damage the product due to the ...
PCB Layout Tips
PCB Layout Tips

PCB Layout Tips
PCB Layout Tips

... from Vcc to Gnd (remember, to an AC signal, both Vcc and Gnd are AC gnd). • Use 10 - 100 uF for bulk decoupling. • Use 0.01 - 0.1 uF at each power pin (determined by switching frequencies used in design). • Select a voltage rating higher than Vcc. • Don’t go overboard with too many caps, it will inc ...
Evaluates: MAX4200/MAX4201/MAX4202 MAX4201 Evaluation Kit ________________General Description ____________________________Features
Evaluates: MAX4200/MAX4201/MAX4202 MAX4201 Evaluation Kit ________________General Description ____________________________Features

... 4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1998 Maxim Integrated Products ...
Type CHR high resistance precision chip resistors
Type CHR high resistance precision chip resistors

Electric Circuits Lab 2
Electric Circuits Lab 2

wd7s productions high voltage power supply board hv-2
wd7s productions high voltage power supply board hv-2

INMP405 - Shop the InvenSense Store
INMP405 - Shop the InvenSense Store

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Surface-mount technology



Surface-mount technology (SMT) is a method for producing electronic circuits in which the components are mounted or placed directly onto the surface of printed circuit boards (PCBs). An electronic device so made is called a surface-mount device (SMD). In the industry it has largely replaced the through-hole technology construction method of fitting components with wire leads into holes in the circuit board. Both technologies can be used on the same board for components not suited to surface mounting such as large transformers and heat-sinked power semiconductors.An SMT component is usually smaller than its through-hole counterpart because it has either smaller leads or no leads at all. It may have short pins or leads of various styles, flat contacts, a matrix of solder balls (BGAs), or terminations on the body of the component.
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