Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Question
Chapter 53, Problem 1RQ
To determine
The identification of the pin 1 of an in line integrated circuit.
Expert Solution & Answer

Explanation of Solution
Identifying the left hand side of the IC is done by looking for a notch on the top of the package. The top left pin is pin1 which is sometimes identified with a small dot next to it. 555 timer is an integrated circuit with eight pins which is widely used in industrial electronics.
The presence of a notch at an end or dot on one pin gives the identification of the pin 1. Thus, a notch or a dot is used to identify the pin 1 in 555 timer.
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1.1 m
1.3 m
B
60-mm diameter
Brass
40-mm diameter
Aluminum
PROBLEM 2.52
-
A rod consisting of two cylindrical portions AB and BC is restrained at both
ends. Portion AB is made of brass (E₁ = 105 GPa, α = 20.9×10°/°C) and
portion BC is made of aluminum (Ę₁ =72 GPa, α = 23.9×10/°C).
Knowing that the rod is initially unstressed, determine (a) the normal
stresses induced in portions AB and BC by a temperature rise of 42°C, (b)
the corresponding deflection of point B.
30 mm
D
=
40 MPa
-30 mm
B
C
80 MPa
PROBLEM 2.69
A 30-mm square was scribed on the side of a large steel pressure
vessel. After pressurization, the biaxial stress condition at the square
is as shown. For E = 200 GPa and v=0.30, determine the change in
length of (a) side AB, (b) side BC, (c) diagnonal AC.
Please solve in detail this problem
thank you
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Understanding Motor Controls
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