What is the purpose of a OCTAL BUFFER in a keypad and seven segment display circuit?
-
Basically the purpose of the circuit is so that a user presses a number on a key pad which then is dispalyed on a seven segment display. The main components of the circuit are: A PIC A seven segment display A flip-flop/ 8bit register chip A Kepad An octal buffer chip What is confusing me is the purpose of the OCTAL buffer, i can't find any info on the purpose anywhere. The key pad has coloums and rows but on the coloums output of the keypad there is an octal buffer which outputs to the PIC. Why cant the keypad output straight to the PIC? I can't see the purpose of the OCTAL BUFFER. Any help greatly appreciated!
-
Answer:
It debounces the keypad, probably. If you put a scope on it you'd see a hundred or thousand keypresses, which confuses the PIC. Out of the buffer (it might be clocked) you just get one nice clean one.
MindSpon... at Yahoo! Answers Visit the source
Related Q & A:
- What is the difference between a bar, a tavern, a pub, and a saloon?Best solution by Yahoo! Answers
- What's the difference between a private franchise and a public franchise?Best solution by answers.yahoo.com
- What is the difference between a standby battery and a deep cycle battery?Best solution by answers.yahoo.com
- What is the difference between a shelf cloud and a wall cloud?Best solution by Yahoo! Answers
- What's the Purpose of a Fuel Cell?Best solution by ChaCha
Just Added Q & A:
- How many active mobile subscribers are there in China?Best solution by Quora
- How to find the right vacation?Best solution by bookit.com
- How To Make Your Own Primer?Best solution by thekrazycouponlady.com
- How do you get the domain & range?Best solution by ChaCha
- How do you open pop up blockers?Best solution by Yahoo! Answers
For every problem there is a solution! Proved by Solucija.
-
Got an issue and looking for advice?
-
Ask Solucija to search every corner of the Web for help.
-
Get workable solutions and helpful tips in a moment.
Just ask Solucija about an issue you face and immediately get a list of ready solutions, answers and tips from other Internet users. We always provide the most suitable and complete answer to your question at the top, along with a few good alternatives below.