39 4 soldering a printed circuit board

... assigned as well as all the packages (ie.: dipl4, axial 0.3, etc.) and make sure that all physical packages you are using exists in the PCB Library! Advantages of using a Netlist are; -mistakes are ... 12-KEEP ANALOGUE AND DIGITAL CIRCUITS SEPARATED In case your application involves a combination of analog and digital circuits it is recommended to keep these circuits physically separated on ... Design Seminar, Analog Devices 1990 3- Fundamentals of Printed Circuit Design and Manufacturing 1986 4- Printed Circuit Technical Manual 107, Bishop Graphics 1982 5- Protel Autotrax Manual 1988 6-...

Ngày tải lên: 14/08/2014, 11:20

... board This can happen if you use a warped board If the pattern i s bad, you may as well salvage the board by cleaning off the resist with lacquer thinner and cleanI ng/recoating (A warped board ... Lay the board flat and spray a light, continuous film (Sink marks will indicate poor board Drying the board in cleaning.) Sight along the board surface toward a dark cupboard your light; make ... pencil-lead stream of water If the water tends to pull away from the boards edges or Spray a thin, even coat Thick coats any point on the aboard, clean it may cause again If the board cannot pass this...

Ngày tải lên: 19/10/2013, 10:15

... board This can happen if you use a warped board If the pattern i s bad, you may as well salvage the board by cleaning off the resist with lacquer thinner and cleanI ng/recoating (A warped board ... Lay the board flat and spray a light, continuous film (Sink marks will indicate poor board Drying the board in cleaning.) Sight along the board surface toward a dark cupboard your light; make ... pencil-lead stream of water If the water tends to pull away from the boards edges or Spray a thin, even coat Thick coats any point on the aboard, clean it may cause again If the board cannot pass this...

Ngày tải lên: 19/01/2014, 20:20

... should always add a paste mask layer obstacle This obstacle should have the same size and shape as the top layer pad You place obstacles on the paste mask layer where you want solder paste Again, ... layers On these more complicated boards a padstack may have obstacles defined on one or more layers There is no rule that a padstack must have obstacles defined on all layers in a circuit board ... mask layer Note that all surface mount pads, through-hole pads, and vias have a corresponding obstacle on the solder mask layer and that the traces not When this circuit board is fabricated all...

Ngày tải lên: 18/04/2014, 12:29

... 1-1 An array of printed circuit boards in various sizes, form factors, and materials (a) A rigid 18-layer board for computer applications; (b) a flex board for cellular telephone applications; and ... National Association of Manufacturers 2005 Pro-Growth and Pro-Manufacturing Agenda Washington, D.C.: National Association of Manufacturers Available at http://www.nam.org/s_nam/doc1.asp?CID =4& DID=232 739 ... 13 ,43 6 1,019 3,820 3,638 Asia/Pacific Europe Middle East and Africa North America Other Americas World Total Asia/Pacific Europe Middle East and Africa North America Other Americas World Total...

Ngày tải lên: 12/02/2014, 19:20

Ngày tải lên: 25/08/2016, 19:32

... to learn English PERIOD 24 : READ FOREIGN LANGUAGE COUNCIL ACADEMY OF LANGUAGE NEW ENGLISH INSTITUTE BEGINNER INTERMEDIATE ADVANCED Advertisements  What are the advertisements about ?  What kind ... Language level : _ Time to start : _ What time can you go to your English class? Which level you choose ? When you want to start learning ?  Imagine you are a manager / head of a ... 827 787 for more information SCHOOLs CLASS TIME LANGUAGE LEVEL TIME TO START Morning ACADEMY OF advanced First week of afternoon November LANGUAGE evening 3rd FOREIGN LANGUAGE morning Beginner...

Ngày tải lên: 18/08/2013, 15:10

... reading a book reading a book writing a letter I’m _ writing a letter drawing a picture I’m drawing a picture singing a song I’msinging a song _ b.Ask and answer: ... I K E • read (v): đọc • write (v): viết • draw (v): vẽ • sing (v): hát • read (v): a • draw (v): b • write (v): c • sing (v): d Thu: What doing, Nam ? are you Nam: I’mreading a letterfrom ... 80 30 20 100 70 50 60 80 10 30 20 100 70 50 Points 40 Start End 100 Team A Team B Congratulations! Congratulations! End Do exercises 1, 2, page Workbook ...

Ngày tải lên: 30/09/2013, 03:10

... Play a game: Questions 4: Answer a, Is your school in the country or in the city? -It’s in the country -B, How many classrooms are there? -There are eleven -How many students are there? -There are ... school? This is Hoa This is her living room This is Hoa’s living room Thursday, October 14th, 2010 UNIT4: BIG OR SMALL? Lesson1: A1 -6- Where is your school? Ii- grammar * Possessive case:Sở hữu cách ... are three hundred and twenty-nine 1 Learn new words by heart Introduce about your school Prepare new lesson: B1,2 Thursday, October 14th, 2010 UNIT4: BIG OR SMALL? Lesson1: A1 -6- Where is your...

Ngày tải lên: 30/09/2013, 10:10

... country There are classrooms There are 20 classrooms There are 40 0 students There are 900 students Is many classrooms are in the in in the country Howyour school students areor there in are there ... country There are classrooms There are 20 classrooms There are 40 0 students There are 900 students Phong’s school is in the country It is small There are eight classrooms There are four hundred ... school Thereare nine hundred students in her school There are school twenty classrooms 4 Complete the table: …school in the in the country big small classes students city V Phong’s V 40 0 Thu’s...

Ngày tải lên: 11/10/2013, 03:11

... America (BSA) is a youth 2.Read It builds character, encourages good citizenship and organization personal fitness Scouting began in England in 1907 Two years later an America businessman, William Boyce, ... Scouts of America): The Boy Scouts of America celebrated its one-hundredth anniversary on February 8, 2010 Scouts Association: A scout parade in Oxford,20 04 The coeducational Camp Fire Boys and Girls: ... clean social voluntary activities such as: collecting the beaches and thecleaning the beaches roads in the city as garbage for recycling, well as in the countryside / as in the and the roads...

Ngày tải lên: 17/10/2013, 03:11

... BRI interface The string in parenthesis is the legal abbreviation that can be used in IOS command to represent the interface 4- 4 CCNA 2: Routers and Routing Basics v 3.0 - Lab 4. 1 .4 Copyright ... prompted for a password, enter class If “class” does not work, ask the instructor for assistance Router>enable At the privileged EXEC mode, enter the command erase startup-config Router#erase startup-config ... type of router as well as how many interfaces the router has There is no way to effectively list all of the combinations of configurations for each router class What is provided are the identifiers...

Ngày tải lên: 04/11/2013, 16:15

... of evaluating user data management options based on organizational needs and the current and planned environment Categorizing User Data Management Needs Identifying Available User Data Management ... user data management in the areas of data availability, data accessibility, and data protection and security Data Availability By using RUPs and Folder Redirection technologies, users can have immediate ... not store data locally Module 4: Designing a User Data Management Strategy 15 Identifying Available User Data Management Options Topic Objective To identify available user data management options...

Ngày tải lên: 10/12/2013, 15:15

... 24 Activity 4. 4: Creating a Future-State Usage Scenario Exercise 1: Creating a Future-State Use Case (30 minutes) ! Create a future-state use case Participate in small groups as assigned ... this space to create the future-state use cases Activity 4. 4: Creating a Future-State Usage Scenario Exercise 2: Creating a Future-State Usage Scenario (30 minutes) ! Create a future-state usage ... and Bardell, Inc case study Review the current-state use cases and usage scenarios Create future-state use cases for the client billing process by using the current-state use case as a template...

Ngày tải lên: 10/12/2013, 16:16

... Logical Data Design Logical Data Design Module 4: Deriving a Logical Data Design Entities and Attributes Activity 4. 2: Creating a Logical Data Model Entity/Relationship Modeling Data Relationships ... Need for a Logical Data Design Slide Objective To discuss the reasons why a logical data design is necessary " A logical data design: $ Translates conceptual data needs into real data requirements ... at their cardinality and existence 78 Module 4: Deriving a Logical Data Design Overview of Data Relationships Slide Objective To introduce data relationships Lead-in Data relationships are an...

Ngày tải lên: 21/12/2013, 06:18

... identify the cardinality and existence characteristics of the relationships ! Assign students to small groups and have them create an ER diagram with labeled relationships Then lead a class discussion ... Try to anticipate all the alternative answers that the students might derive Activity 4. 2: Creating a Logical Data Model In this activity, students identify relationships between entities, and then ... Module 4: Deriving a Logical Data Design Activities Activity 4. 1: Deriving Entities and Attributes from Data Requirements This activity provides students with a real-world example of use case requirements...

Ngày tải lên: 17/01/2014, 09:20

... be deactivated Only objects that have been added after installation can be deactivated Classes and Attributes Are Not Deleted, but Deactivated ! Lead-in Classes and Attributes Can Be Reactivated ... class Alternatively, derive a new child class from an existing class, and then add any additional attributes that you need You may also create an auxiliary class with the additional attributes, and ... You cannot deactivate default schema objects You can only deactivate objects that have been added to the schema after schema installation ! You cannot deactivate attributes that are in use by a...

Ngày tải lên: 17/01/2014, 09:20

... Step Start HyperTerminal program a Turn on the computer and router b From the Widows taskbar, locate the HyperTerminal program: Start > Programs > Accessories > Communications > Hyper Terminal Step ... Step Name the HyperTerminal Session a At the “Connection Description” popup, enter a name in the connection Name: field and select OK Step Specify the computers connecting interface a At the ... warning popup appears, select Yes 3 -4 CCNA 2: Routers and Routing Basics v 3.0 - Lab 2.2 .4 Copyright  2003, Cisco Systems, Inc c The computer will then ask if the session is to be saved Select...

Ngày tải lên: 18/01/2014, 04:20

... Step Name the HyperTerminal Session a At the “Connection Description” popup, enter a name in the connection Name: field and select OK Step Specify the computers connecting interface a At the ... 9600 Data Bit: s Parity: None Stop bits: Flow control: none 2 -4 CCNA 2: Routers and Routing Basics v 3.0 - Lab 2.2 .4 Copyright  2003, Cisco Systems, Inc Then select OK b When the HyperTerminal ... warning popup appears Select Yes 3 -4 CCNA 2: Routers and Routing Basics v 3.0 - Lab 2.2 .4 Copyright  2003, Cisco Systems, Inc c The computer will then be ask if the session is to be saved Select...

Ngày tải lên: 18/01/2014, 04:20