I'd like to build a sailboat racing timer... - diyAudio
Go Back   Home > Forums > General Interest > Everything Else
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 12th July 2006, 04:55 PM   #1
diyAudio Member
Join Date: Feb 2004
Location: Racine, Wisconsin
Default I'd like to build a sailboat racing timer...

Well, all I know is that I would use 555 timer IC's and the rest is a mystery....

It's a count down timer for small boat racing that operates like this...

Need three, 1 second pulses at initial start (@ 3 minutes)
Two, 1 second pulses one minute later (@ 2 minutes)
One, 1 second pulse one minute later (@ 1 minute)
Three, half second pulses 30 seconds later (@ 30 seconds)
Two, half second pulses 10 seconds later. (@ 20 seconds)
One, half second pulse 10 seconds later (@ 10 seconds)
Four 1/4 second pulses every one second, 5 seconds later (@ 5 seconds)
One one second pulse at -0- seconds.

  Reply With Quote
Old 12th July 2006, 06:30 PM   #2
Stocker is offline Stocker  United States
diyAudio Member
Join Date: Dec 2003
Location: Austin
sounds like something easier accomplished with a computer.

or else, multiple circuits. one circuit to do all that could get hairy. maybe have one circuit firing, start another...?
Jesus loves you.
  Reply With Quote
Old 12th July 2006, 06:45 PM   #3
diyAudio Member
Join Date: Feb 2004
Location: Racine, Wisconsin
Computer is not a possiblility... Too wet, too much exposure to elements.

Cascaded 555's/556's is certainly a possibility.
  Reply With Quote
Old 12th July 2006, 06:54 PM   #4
diyAudio Moderator
pinkmouse's Avatar
Join Date: Apr 2002
Location: Rotherham, England
I'd have thought a PIC or similar would be ideal for that application.
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 12th July 2006, 07:11 PM   #5
diyAudio Member
Join Date: Feb 2004
Location: Racine, Wisconsin
Pink... where do I get started on a PIC?


  Reply With Quote
Old 12th July 2006, 08:01 PM   #6
dnsey is offline dnsey  United Kingdom
diyAudio Member
Join Date: Mar 2004
Location: Shropshire, England
I made a very similar thing for photographic processing many years ago, based on cascaded 555s. Easy and effective - just make sure that the ICs are adequately decoupled, or they may 'go off' on the wrong pulses!
  Reply With Quote
Old 20th July 2006, 10:42 AM   #7
diyAudio Member
Join Date: Jul 2003
Location: Dona paula, Goa
7217, 4017, 4541, MM5369 will come handy in such design

Gajanan Phadte
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Subwoofer for Sailboat 22' (Ensign)?? dellaseppes Multi-Way 5 24th March 2005 02:10 PM
Tube Drag Racing! Sch3mat1c Tubes / Valves 9 29th December 2004 08:58 AM
Build 12V to 220V inverter from 555 timer Astro Power Solid State 1 4th December 2004 02:49 PM

New To Site? Need Help?

All times are GMT. The time now is 09:50 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2