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4. Encoders and Decoders (in progress)

Introduction: 

Decoders and Encoders are important switching components in digital circuits. Encoders generate a digital code to indicate which one of several input lines is active. Decoders do the opposite, activating one of several output lines based on the digital code that is received. This experiment starts by designing a basic decoder circuit.
Note: The full set of videos is presented on the YouTube channel: DerekMolloyDCU

Equipment Required:


- The voltage regulator circuit from experiment 1.
- 74HC238 - 3 line to 8 line decoder
- 8 LEDs (any colour)
- 3 momentary push button switches
- suitable resistors to drive the LEDs.



Introduction

This video introduces a 3-line to 8-line decoder and shows how to wire all of the inputs required according to the datasheet of the component.


Experiment for you to design

(to follow)




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74HC_HCT238.pdf
(52k)
Derek Molloy,
17 Jul 2010, 16:09
v.1
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