Aaron's Homepage Forum
Aaron's Homepage Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
 Password:
Save Password
Forgot your Password?

 All Forums
 Electronics
 Other Circuits
 Derby Car lap time tracking and display		  New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

tonytee
New Member

1 Posts
Posted - Feb 15 2011 :  7:36:50 PM  Show Profile  Reply with Quote
Hi, I am trying to build a derby race timer. This is only for a single track and car. I need a circuit diagram that includes an an optical timer starter at the top of the track, and an optical timer stopper at the bottom of the track. I also need the display to show 1 digit full second display, as well as 4 point second accuracy (Ex: 2.9546 seconds) I am going to use this as a timing tool to build the fastest car I can, so that any small modifications would be noticed.

Thanks,
TT

Aaron Cake
Administrator

Canada
6718 Posts
Posted - Feb 19 2011 :  10:25:04 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
Probably the easiest thing to do is modify a stop watch. Create a circuit to hit the start/stop button. Paint a reflective line on the track at the start line and then use an IR LED and phototransistor combination with a simple comparator circuit to trigger the stopwatch.
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Aaron's Homepage Forum © 1995-2020 AARONCAKE.NET Go To Top Of Page
This page was generated in 0.05 seconds. Snitz Forums 2000