Site Logo Home
 
rOm
Quest
Glossary
 
Random
Page
Search
Site
Lush
Sim
Class
Subject
Images
 
Help
FAQ
Sign
Up
Log
In
Extras Non Exam     Control Systems     Damping     >Displays<     Neural Networks     Stepper Motors    

Control Systems Displays


Site for Eduqas/WJEC - Go to the AQA site.

  Extras Non Exam    Control Systems  0 of 12    Question 227    Control System Damping 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set1 of 12    Question 228    Control System Damping 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set2 of 12    Question 229    Control System Damping 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set3 of 12    Question 230    Control System Damping 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set4 of 12    Question 946    Motors 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set5 of 12    Question 947    Motors 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set6 of 12    Question 948    Motors 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set7 of 12    Question 694    Motors 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set8 of 12    Question 695    Motors 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set9 of 12    Question 696    Motors 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set10 of 12    Question 697    Motors 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set11 of 12    Question 698    Motors 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set12 of 12    Question 699    Motors 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set  Questions 0 to 12   -->  View All  

There are two classes of display ...

  1. Dot matrix:
    These can display any shape you like at a resolution that only depends on the number of dots in the display.
    LCD Matrix Dispay LED Matrix
     
  2. Segmented:
    These tend to be cheaper but can only show or hide the segments.
    This restricts the shapes that can be displayed.
    The commonest is the seven segment display for digits and a very few letter shapes.
    Seven Segment Display
     

There are three main types of display ...

  1. LCD: Liquid crystal display
  2. LED: Light emitting diodes
  3. OLED: Organic LED
    OLED Matrix Display
     

Old school displays based on neon gas discharge tubes or conventional light bulbs are falling into disuse. 

Display Type LED Segments LED Matrix LCD Segments LCD Matrix OLED Segments OLED Matrix
Current 10mA per LED. 10mA per LED. Up to 640 mA for one 8x8 matrix. A 15 letter display could drain 10 up to Amps! Microamps Microamps Milliamps Milliamps
Visibility Poor in bright sunlight Poor in bright sunlight Need a backlight in the dark Need a backlight in the dark Poor in bright sunlight Poor in bright sunlight
Response Fast Fast Slow Slow Fast Fast
Robustness Good Good Delicate Delicate Delicate Delicate
Cost Cheap More Expensive Cheap Cheap More expensive More expensive
Driver Needed Binary to 7 Segment Decoder Microcontroller and Driver Chip/s needed Binary to 7 Segment Decoder or similar technology Microcontroller and Driver Chip/s needed Never seen these Microcontroller and Driver Chip/s needed

 

Subject Name     Level     Topic Name     Question Heading     First Name Last Name Class ID     User ID    

fff
Home
<<<
ppw
Pg Up
<<
ppp
Up
<
|||

>|<
nnn
Down
>
nnw
Pg Down
>>
lll
End
>>>

Close
Escape
X

Q: qNum of last_q     Q ID: Question ID         Score: num correct/num attempts         Date Done    

 

Submit
Enter

 

Question Text

image url

 


Help Link

Add     Delete     Clone     Edit     Hardness

Help Text
Debug


 

 

 

Contact, Copyright, Cookies and Legalities: C Neil Bauers - reviseOmatic V4 - © 2016/17

Hosted at linode.com - London