bistable multivibrator using 555 timer ppt
IC 555 - Timer và những ứng dụng
Ngày tải lên :
06/11/2013, 22:15
... hãng CMOS
sản xuất .Sau ñây là bảng thông số của 555 có trên thị trường :
+ ðiện áp ñầu vào : 2 - 18V ( Tùy từng loại của 555 : LM555, NE555, NE 7555 )
+ Dòng ñiện cung cấp : 6mA - 15mA
+ ðiện ...
IC 555 - Timer và những ứng dụng
555 là một loại linh kiện khá là phổ biến bây giờ với việc dễ dàng tạo ñược xung ... chỉ là những thông số cơ bản của 555. Còn những thông số khác các pác tham khảo datasheet!
1 : Giới thiệu, sơ ñồ khối, sơ ñồ nguyên lý, chân của 555
IC thời gian 555 ñược du nhập vào những năm...
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Tài liệu Creating a Logical Standby Database by Using Enterprise Manager ppt
Ngày tải lên :
09/12/2013, 16:15
... logical standby
database.
ã
Unsupported objects:
Tables and sequences in the SYS schema
–
Tables using table compression
–
Tables used to support materialized views
–
Global temporary tables
–
Tables ... Apply
ã
Explain when to use a logical standby database
ã
Create a logical standby database by using Enterprise
Manager
Copyright â 2006, Oracle. All rights reserved.
7 - 4
Benefits of Implementing ... 30
Practice 7: Overview
This practice covers the following topics:
ã
Creating a logical standby database using the
Add Standby Database Wizard
ã
Verifying the configuration
Copyright â 2006, Oracle. All...
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Tài liệu ADC KRONE - Guide - FO - The challenge in using APC connector ppt
Ngày tải lên :
10/12/2013, 02:15
... center of the optical fiber). We can find z by using the law of sines:
c=z
C=2α
A=90- α+θ
(
)
b =
y +
2tan
α
x
0
c =
sin(A)
bsin(C)
cos
α
1
2 cos
α
1
(Using the imaginary lines in Figure 4 to find ... the center of the ferrule endface moves to the left, away from the ferrule axis.
When polished using a compliant rubber polishing pad, a convex spherical radius is put onto the
ferrule endface. ... 4 to find the length of b).
´
´
Recognizing that apex offset is:
We insert z into apex offset:
Using the relation: 2cosx =
2
z
-
, Where x
1
= x
0
+ 2ytan
α
2cos
θ
x
1
(
)
(
)
ApexOffset =
y...
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Tài liệu Create a WAN Using SDSL Modems pptx
Ngày tải lên :
10/12/2013, 18:15
... each
access point (including emergency ser-
vice providers), which is best done using
h a rd - w i red land line communications
using a single broadband access point
that is shared by all offices and ... difficulties using single-point Internet access or some database
programs that require a current IP address for the workstation.
4. Bridged SDSL is limited to 255 total computers or devices using an ... your organizations are with-
in the same city, you might be able to
set up a “campus” type system using sin-
gle-line Digital Subscriber Line (SDSL )
modems connected by a single pair of
phone wires....
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Tài liệu Lab 4.1.6 Using CDP Commands ppt
Ngày tải lên :
11/12/2013, 14:15
... version is used, CDP must be
enabled on each of the device interfaces. Enable CDP by using the cdp enable command. Using
the command show cdp interface gathers the information that CDP uses for its ... holdtime value?
_____________________________________________
d. Global CDP settings can be seen using the show cdp command by itself.
e. What information is not show in the show cdp command? ... Routers and Routing Basics v 3.0 - Lab 4.1.6 Copyright 2003, Cisco Systems, Inc.
Lab 4.1.6 Using CDP Commands
Objective
ã Use CDP commands to obtain information about neighboring...
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Tài liệu Mạch đèn chạy đơn giản dùng 555 + 4017 pptx
Ngày tải lên :
11/12/2013, 21:16
... với 1
con LED sáng.
+ Xung được 555 tạo ra là xung vuông chỉ có 2 giá trị là 0 hoặc 1 và CD4017 có
thể đếm được 1 trong 2 giá trị này. Để hiểu đặc tính của 555 các pác vui lòng
xem ở bài viết ... chân Reset. Khi chân này tác động ở mức 1 thì đếm sẽ bị Reset về
2 ) Phần tạo dao động dùng LM555
555 là loại linh kiện tạo dung vuông có điều chỉnh được độ rộng xung (PWM).
Mạch tạo xung vuông ...
Việc đầu tiên chúng ta hãy đi tìm hiểu các phần sau
1) Tìm mua linh kiện
+ 1 con LM 7555 sẽ có giá là 2-3K/con.
+ CD4017 có giá là 4k/con
+ 10 con LED bình thường : 3K
+ 1 con tụ...
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Tài liệu Introduction to the Altera SOPC Builder Using Verilog Design ppt
Ngày tải lên :
13/12/2013, 00:15
... Altera’s FPGA devices by using the Quartus
R
II CAD system. To implement a useful system it is necessary
to add other funcional units such as memories, input/output interfaces, timers, and communications ... automatically by the SOPC Builder. We will choose the latter possibility. So,
select the command (using the menus at the top of the SOPC Builder window) System > Auto-Assign
Base Addresses, which ... II program that performs the desired task.
Doing this tutorial, the reader will learn about:
ã Using the SOPC Builder to design a Nios II-based system
ã Integrating the designed Nios II system...
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Tài liệu Electronics and Circuit Analysis Using MATLAB P10 ppt
Ngày tải lên :
13/12/2013, 01:15
... <
=<<
0
0
(10.62)
The maximum electric field
E
qN W qN W
AP
s
DN
s
max
==
εε εε
00
(10.63)
Using Equation (10.47) or (10.48, Equation (10.63) becomes
E
qN N V V
NN
DAC S
SAD
max
()
()
=
−
+
2
0
εε
... CRC Press LLC
Attia, John Okyere. “Semiconductor Physics.”
Electronics and Circuit Analysis using MATLAB.
Ed. John Okyere Attia
Boca Raton: CRC Press LLC, 1999
... temperature
is given as [1].
ET x
T
T
g
() . .
=−
+
−
117 4 37 10
636
4
2
(10.6)
Using Equations (10.1) and (10.6), we can calculate the electron concentration
at various temperatures....
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Tài liệu Electronics and Circuit Analysis Using MATLAB P8 ppt
Ngày tải lên :
13/12/2013, 01:15
... MATLAB program to obtain
a
n
and
b
n
for
n
= 0 ,
1, , 10 by using Equations (8.5) and (8.6).
(c) Resynthesis
g(t)
using 10 terms of the values
a
n
, b
n
obtained from part (b). ...
gt
ee
jn
jn t
n
n
()
()( )
()
exp( )
=
−−
+
−
=−∞
∞
∑
1
22
22
π
π
(8.22)
(ii) Using a MATLAB program, synthesize
gt
()
using 20 terms, i.e.,
â 1999 CRC Press LLC
â 1999 CRC Press LLC
...
A
a
dc
2
0
2
2
=
(8.11)
The following example shows the synthesis of a square wave using Fourier
series expansion.
â 1999 CRC Press LLC
â 1999 CRC Press LLC
gt G f...
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Tài liệu Navigating Between Parent and Child Records Using a DataRelation pptx
Ngày tải lên :
14/12/2013, 18:16
... NavigateDataRelationForm.cs
// Namespaces, variables, and constants
using System;
using System.Configuration;
using System.Text;
using System.Data;
using System.Data.SqlClient;
// Table name constants ... [ Team LiB ]
Recipe 3.4 Navigating Between Parent and Child Records Using a DataRelation
Problem
You want to navigate between the parent and child records in a hierarchical...
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Tài liệu Refreshing a DataSet Automatically Using Extended Properties pptx
Ngày tải lên :
14/12/2013, 18:16
... processing. This is the simplest timer to use but also
the least accurate with an accuracy limited to 55ms.
ã
The thread timer System.Threading .Timer is a simple, lightweight timer that uses
callback ...
The server-based timer System.Timers .Timer (available on the Components tab of
the Toolbox) is designed for use with worker threads in a multi-threaded
environment. This timer uses server ... DateTime.Now.AddSeconds(DATAREFRESH_SECONDS).ToString( );
// Start the timer.
timer = new System.Threading .Timer(
new TimerCallback(CheckRefreshDatabase), null,
DATASETCHECKREFRESHINTERVAL_MS,...
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Tài liệu Development of an Observe-By-Wire System for Forklifts Using Haptic Interfaces pptx
Ngày tải lên :
17/12/2013, 11:15
... or storage.
(a): forklift operation; (b): distance measurement
using four distance sensors and feedback force
implementation using a DC motor.
The essential components of an OBW system are ... subject’s result.
It showed that the user could complete his or her task
three times without using the OBW system while she or
he can complete her or his task five times with the
OBW system ... thin line for all
subjects. The seventh subject even could accomplish
this taks seven times by using the OBW mode.
The fig.9 is the distance error results calculated by
the following:
N
e
Error
N
i
∑
=
1
...
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Tài liệu Using Window Systems pptx
Ngày tải lên :
21/12/2013, 11:15
... find it using the
command which or type fr om a shell prompt, like this:
$ type xterm
xterm is /usr/X11R6/bin/xterm
$ which xterm
/usr/X11R6/bin/xterm
7 January 2002 13:11
40 Chapter 2: Using ... program exits. If yours doesn’t do this,
though, you’ll need to finish by using the terminal window’s own
“close” command.)
Using the program’s own “quit” command gives the program time to
clean ... wait just as they would on a standard terminal.
7 January 2002 13:11
32 Chapter 2: Using Window Systems
If you’re using a terminal window (such as xter m), and a
pr ogram is already running in that...
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Tài liệu Cotter Pin using Family Table pptx
Ngày tải lên :
22/12/2013, 11:17
... and ready to be used.
1
ME-430 INTRODUCTION TO COMPUTER AIDED DESIGN
Cotter Pin using Family Table
Pro/ENGINEER Wildfire 2.0
Dr. Herli Surjanhata
The following procedure ... cotter pin containing family table
information – see above. The modeling of cotter pin is done using Sweep protrusion.
CREATING A SWEEP PROTRUSION FOR COTTER PIN
From Insert pull down ... button.
Done/Return
Note: When adding a Family Table to a drawing as a note, justify
the note using Default or Left. If you use Center or Right, the
system might format the Family Table incorrectly...
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