Lab 6. Binary Counter
Overview of this Session
In this laboratory, you will learn:
•
Continue to use the scope to characterize frequencies
•
How to count in binary
•
How to use an MC14161 or CD40161BE counter
Introduction
•
The TA will show you the MC14161 or CD40161BE counter and the MC14012
quad input NAND gate.
Oscilloscope Measurements
6.1
Connect the signal from the function generator to the oscilloscope and
determine the type of signal present, the frequency, amplitude, and the
DC offset.
Draw a picture of the signal on your answer sheet.
Show all
calculations for amplitude, period, frequency, and DC offset.
Background
Counting:
Before starting with counters there is some vital information that needs to be
understood. The most important is the fact that since the outputs of a digital chip
can only be in one of two states, it must use a different counting system than you
are accustomed to. Normally we use a decimal counting system; meaning each
digit in a number is represented by one of 10 characters (0-9). In a binary
system, there can only be two characters, 0 and 1.
When counting up in a decimal system, we start with the first digit. When that
digit ‘overflows’, i.e. gets above 9, we set it to 0 and add one to the next digit
over. The same goes for a binary system. When the count goes above 1 we add
one to the next digit over and set the first digit to 0. Here is an example.
1

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