Star Tech Journal

Issue: 1983-December - Vol 5 Issue 10

30
STAR*TECH JOURNAL/DECEMBER 1983
he.c
rus
The names of various Transistor Terms
comprise this issue's word puzzle. Find and
encircle these words as they appear below.
They run vertically, horizontally, diagonally
and sometimes backwards.
TRANSISTOR TERMS
PMOSFETVEQ
L Q T B I T C M M F
X R D F P W I S W T
L L J W V T C F G Y
V U O J T U I A Z E
N X O E U L T F R W
G J R N B E Y O P M
S W A J W N T Z W F
B V H G T C H N I C
E I C W E Y W O J H
Z K P L B E S I Q A
A O L O K Z J T E N
D O C G L K A C G N
C D T U U A R N W E
K R U O I U R U N L
C A W R O Y Y J V I
A I B S E C H P Q R
A N Z K S F M B O V
D E V A A Z D M Z M
I E G P B P E Y T G
BASE
SOURCE
JUNCTION
GATE
BIPOLAR
COLLECTOR
DRAIN
CHANNEL
MOSFET
EMITTER
Here is the answer key
to November's puzzle:
LASER DISC OPTICS
IN
70. Why are integrated circuits divided into two categories ( digital and linear)?
a. These names refer to two general types of packages.
b. These are the two temperature ranges or grades into which ICs are
classified by testing.
c. I Cs are simply circuits that happen to be constructed integrally, and like all
circuits, are either switching-type or amplifying-type.
d One type processes infonnation and the other controls large working
devices such as motors.
e. ICs are used for either input purposes or output purposes.
71. What advantages do I Cs have over discrete-device circuits due to their greater
complexity (more circuitry in less area)?
a. Smaller size
b. Higher reliability
c. Better overall perfonnance
d Lower cost
e. All but c above
72. What are the limitations of integrated circuits?
a. Not all electronic components can be efficiently integrated into a silicon
chip.
b. ICs are generally more expensive than their discrete-device counterparts.
c. ICs are limited to rather low voltages.
d ICs can stand a relatively small amount of power dissipation (heating).
e. All but b above.
73. Which of the following common electronic components is not found in
ordinary ICs?
1. Inductors
b. Diodes
c. Resistors
d Transistors
e. Low-capacitance capacitors
74. Why is the plastic dual-in-line package the most popular IC package?
a. It is low in cost.
b. It is easy to insert and solder into printed wiring boards by means of
automatic handling equipment.
c. Its solid construction makes it ruggedly resist vibration and impact.
d It is one of the smallest possible packages.
e. All but d above.
lnQuizltlve Answers (November)
66) e 67) d
68) c
69) a
***
Star•Tech Journal Technical Seminars
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Distributor-sponsored S*TJ Technical Seminars are available at no cost to any
distributors interested in assisting their clients to understand operation and
maintenance of videos, pins and lasers.
The 5-day course covers Basic Electronics ( electron theory and semicon-
ductors ), Video Game Systems (power supplies, control panel interfaces, rasterscan
and X-Y monitors), Electronic Pinball Systems (electronic digital systems),
Troubleshooting Techniques, Test Equipment ( digital multimeters and logic
probes), Proper Soldering Techniques, Laser Disc Operation and Maintenance,
How to Read Electronic Schematics and other essential skills.
If you'd like to sponsor an S*TJ Technical Seminar, contact Star*Tech
Journal at 609/662-3432 and ask for our infonnation package. This package helps
you plan your promotion for a successful seminar.
***
MURPHY'S LAW #510
When working toward the solution of a problem,
it always helps if you know the answer.
31
STAR*TECH JOURNAL/DECEMBER 1983
THE BECKMAN HD-100
The HD-100, the Hardhat meter, is an indispensible
tool that has rugged protection from mishaps and
adverse environments.
2000-Hour Continuous Battery Life
The common 9V transistor battery provides up to
2000 hours of continuous operation, and up to 2
years of life under typical use. For added con-
venience, the decimal point blinks during the last
ten percent of battery life.
Easy-to-Use Single Selector Switch
Makes the instrument easier to use and saves
time. You get a unique switch design that is far
more reliable and durable than found in conven-
tional VOMs.
lnsta-Ohms® Continuity Indicator
You can make continuity checks with the speed
and ease of an analog meter. The lnsta-Ohms®
Continuity I ndicatorfeatures an ohms symbol that
appears in the display the instant continuity is
established with test leads.
Reliable 100% Factory Burn-In and
Computer Tested
Every function and range is computer tested at the
factory to assure you of a meter that works the
first time, every time.
Maximum Protection RF Shielding
You can enter high RF energy fields generated by
communication transmitters and high voltage
sources with confidence in your results.
High Accuracy 22-Megohm Input
lmpedence
This special feature reduces errors commonly
LCD Shock Mounted
The 3 1 h digit LCD is shock
mounted to reduce breakage.
High Vialbillty
Color
The international yellow
color helps prevent
accidental loss.
caused by circuit loading. Increased measurement
accuracy over other comparable meters is achieved
by providing a high input impedance in all DC
voltage ranges.
Tough
Thermoplastic
Fire-retardant case
provides protection
against damaoe from
treakage.
Drop-proof
Double-thick case
walls and ribs to
resist cracking.
Guaranteed Long-Term Accuracy
A highly stable band-gap reference element and
thin-film voltage divider network guarantee the
specified accuracy for a one-year minimum,
without calibration
Fast and Accurate In-Circuit Diode
Transistor Test Function
This special test function allows accurate
measurements of forward voltage drops across
diode, LEDs, and transistor junctions with 2mA of
"constant'' test current Semiconductor junctions
can also be measured while in-circuit with as little
as 500 ohms shunt resistance.
ranges.
Completely Equipped to Handle
Your Toughest Jobs
Each unit comes fully equipped with a 9V battery, r------•Filloutandmail • - - - - - -
safety-designed test leads and operato(s manual
□ Rush me _ _ _ Beckman HD-100(s) at$159.95 each.
Beckman Warranty
Each instrument comes with a one-year limited
warranty under which Beckman agrees that H 1111
lnstru111111t falls tor 111y l'HH■ wlllls111er,
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Send my Hardhat Meter to:
Your na,,,._ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Company-----------------
Addre.._ __________________ _
City/State/Zip ________________ _
The Beckman HD-100 lists for$169. Star•Tech
Journal is offering this unit at the special price of
$158.85. Please make your check or money order
payable to Star•Tech Journa\ P.O. Box 1065,
Merchantville, NJ 08109.
New Jersey residents add 6% sales tax.
Mail this coupon with your payment to:
Star*Tech Journal, P.O. Box 1065, Merchantville, NJ 08109
Star•Tech Journal is an authorized Beckman distributor.
1
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--------------------------------- - - - --- - - - - --- __ ...
THE BECKMAN DM25
DIGITAL-FEATURES ... AT AN ANALOG PRICE
The Beckman DM25 digital multimeter gives you a wide range of
features at a down-to-earth price.
Features like .. .








Five AC and DC voltage and current ranges
Six resistance ranges
A diode test function to test junction forward bias
An instant continuity beeper to make circuit tracing easy
A capacitance test function
Dual voltages for in-circuit or out-of-circuit resistance tests
Conductance to measure extremely high resistance values
Auto-polarity, auto-zero and auto-decimal capabilities to
eliminate guesswork.
• A single function- and range-selector switch for sure and easy
Instant
Continuity
Beeper
Dual Voltage Selector
Switch for Resistance Tests
use.
This pocket-size meter is the best low-cost digital multimeter you
can buy. It measures approximately 51/a" in length, 3¼" in width
and less than ¼" high. It weighs only 5.75 ounces including
battery.
Also included with your DM25 is a test lead set spare fuse (2A),
a 9V battery and instruction manual. Your meter is backed by the
Beckman warranty.
r- -
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D Rush me _ _ _ _ _ _ _ Beckman DM25(s) at $79.95 each.
Send my meter to:
Your name _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Company
ONLY $79.95
Address _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
You can purchase your Beckman DM25 by filling out the coupon at
right and sending your check or money order to Star*Tech Journal,
P.O. Box 1065, Merchantville, NJ 08109. Star•Tech Journal is an
authorized Beckman distributor.
New Jersey residents add 6% sales tax.
Mail this coupon with your payment to:
Star*Tech Journal, P.O. Box 1065, Merchantville, NJ 08109
Star•Tech Journal is an authorized Beckman distributor.
City/State/Zip
----------------------------- - --- - - - - - - - - - - - - _ __.

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