Go to Post OMG this topic again. Those who stir the pot should lick the spoon. - nuggetsyl [more]
Home
Go Back   Chief Delphi > Technical > Programming
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #9   Spotlight this post!  
Unread 11-02-2003, 01:54
EugeneBrooks852 EugeneBrooks852 is offline
Registered User
#0852
 
Join Date: Feb 2003
Location: Danville California
Posts: 1
EugeneBrooks852 is an unknown quantity at this point
4 bit counter

You can track wheel rotation directly with an optical sensor, as long as your speed does not overrun the roughly 40 HZ poll rate of the PBASIC stamp. We have done this, putting reflective tape on the shaft that drives a chain to the wheels, making it half reflective and half black, and tracking the on/off and off/on transitions. You can track moderate speeds with no counters at all, counting into a variable in the program.

Wanting to track with high precision at high speed, we are trying 4 bit counters using the "7394" chip, a 4 bit binary counter. A viable digikey part is the low power shottky version, SN73LS94N on page 348 of the pdf catalog. The part is easy to use, and you could quickly put it together with a "solder breadboard." Students on our team did artwork for a PC card, and exposed and etched printed circuit boards for the counter. Your program, in this case, must invert the bits, and detect and handle overflow. You should be able to measure inches, or less, at full speed, using this part.
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
drills and chips Ben.V.293 Technical Discussion 1 07-11-2003 13:11
2003 Drills and Chips Chris Motors 3 12-10-2003 19:02
Microsoft Launches Counter Switch Campaign, Then Takes It Away. Joe Matt Chit-Chat 11 17-10-2002 15:53
Counter loop archiver 2001 3 24-06-2002 00:44
Voodoo Gyro Chips... Ghetto_Child Technical Discussion 3 01-02-2002 16:39


All times are GMT -5. The time now is 11:19.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi