Search found 3 matches

by Wing Nut
Tue Apr 25, 2006 9:45 am
Forum: Electronics
Topic: Which sensor schematic to build
Replies: 10
Views: 6621

Re: Which sensor schematic to build

That's a great looking finish line! :D Gives me some ideas, however our track lays flat on the floor, and the bottom of the bridge where the sensors are mounted would make it have a hump there. Although it might not be a bad idea to raise the whole track off the floor a few inches because when the k...
by Wing Nut
Mon Apr 24, 2006 10:09 am
Forum: Electronics
Topic: Which sensor schematic to build
Replies: 10
Views: 6621

Re: Which sensor schematic to build

Sounds like the comparators may be the way to go. Both schematics using comparators use 2 sets of resistors for the reference voltage going to the comparators, would there be any problem with using 1 set to provide reference voltage to all 5 inputs on both the comparators ( 4 finish lines and the st...
by Wing Nut
Wed Apr 19, 2006 3:55 pm
Forum: Electronics
Topic: Which sensor schematic to build
Replies: 10
Views: 6621

Which sensor schematic to build

It's time to upgrade our church's Awana Grand Prix track to an optical finish line, at this point I like the looks of the GPRM software and would like to build a parallel port finish line. So far I've found the 4 lane finish line detector based on pack 471 at GrandPrix Race Central http://grandprix-...