Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 04-13-2012, 12:06 PM   #1
Newbie
 
Join Date: Apr 2012
Posts: 1
Rewards Points: 10
Question

Mine Lights problem


I was given the opportunity in my electrical class to figure this situation out, and am looking for help(which is ok).

It's about how miners wired up lights with 3-way switches for the tunnels. The problem is I need to setup 7 lights and 7 3-way switches to opperate in the following format.

Switch one turns on light 1 and 2
switch two turns off light 1, leaves 2 on and turns on 3
switch three turns off light 2, leaves 3 on and turns on 4
switch four turns off light 3, leaves on light 4 and turns on 5
switch five turns off light 4, leaves on light 5 and turns on 6
switch six turns off light 5, leaves on light 6 and turns on 7
switch seven turns off lights 6 and 7

I then need to be able to run thru them all again from the beginning. It also does not work by code and am using single conductor wires not romex. If anyone would be able to help me figure this out I would appreciate it.

Thanks

Ryan2000 is offline   Reply With Quote
Old 04-13-2012, 05:40 PM   #2
Member
 
Join Date: Oct 2010
Location: Cairns Australia
Posts: 2,594
Rewards Points: 2,148
Default

Mine Lights problem


It would have to be done with digital circuitry.
Whilst it could be done anologue style it would be too complex.
A digital counter / sequencer using a flip flop to advance
the count, the switchs would connect to the flip flops.
Witch would be used to clock the counter.
Do you have any knowledge of digital circuitry ?

dmxtothemax is offline   Reply With Quote
Old 04-13-2012, 08:11 PM   #3
Member
 
Join Date: Sep 2008
Location: Oregon
Posts: 1,497
Rewards Points: 500
Default

Mine Lights problem


Learn about "parallel" and "series" wiring.

Then just a matter of wiring some in parallel and others in series.

Hint: Two regular switches could be wired so either switch would turn on a light, but both must be off to turn off the light.

Or two regular switches could be wired so they both must be on to turn on a light, but with either switch off, the light will turn off.
Billy_Bob is offline   Reply With Quote
The Following User Says Thank You to Billy_Bob For This Useful Post:
PaliBob (04-14-2012)
Old 04-13-2012, 08:20 PM   #4
Member
 
Join Date: Oct 2010
Location: Cairns Australia
Posts: 2,594
Rewards Points: 2,148
Default

Mine Lights problem


What about each light having a 3 way switch arrangement,
At each position two switchs side by side,
One switch upside down compared to the one beside it,
That way you just move both switchs together.
If your really keen, you could use a 4pdt switch,
at each location, instead of two normal switchs of spdt.

This type of set up would require more wires ! but it would work.


I thought he wanted simple switch wiring ???
dmxtothemax is offline   Reply With Quote
Old 04-13-2012, 09:16 PM   #5
Member
 
Join Date: Dec 2011
Location: Livermore, California
Posts: 265
Rewards Points: 250
Default

Mine Lights problem


That's a really interesting problem, with a surprisingly simple and elegant solution. Thank you for giving my brain something to munch on.

As a hint: For each light, which switches affect the light? And how can you describe the relationship between those switches and the light.

Billy_Bob, if you went all the way to a solution, would you mind PMing it to me. The solution I found doesn't involve any switches in series, so I'm curious how you did it.
a_lost_shadow is offline   Reply With Quote
Old 04-13-2012, 09:48 PM   #6
Member
 
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 6,965
Rewards Points: 2,026
Default

Mine Lights problem


Quote:
Originally Posted by Ryan2000
Switch one turns on light 1 and 2
switch two turns off light 1, leaves 2 on and turns on 3
switch three turns off light 2, leaves 3 on and turns on 4
switch four turns off light 3, leaves on light 4 and turns on 5
switch five turns off light 4, leaves on light 5 and turns on 6
switch six turns off light 5, leaves on light 6 and turns on 7
switch seven turns off lights 6 and 7
In this diagram the neutrals are not shown. When wiring it up use 2 wire cables so neutrals accompany the hots at all times.

(added later) Using single conductors, run white wires for neutral doing a simple daisy chain from one switch box to the next in numerical order. Then run white wires to the light fixtures accompanying each wire marked in red in the diagram.
Attached Thumbnails
Mine Lights problem-lights14.jpg  
__________________
Forget super sized fries. The Washington Redskins could promote healthy eating with First Lady Obama by choosing a (red skinned) turnip for a mascot.

Last edited by AllanJ; 04-14-2012 at 05:17 AM.
AllanJ is offline   Reply With Quote
Old 04-13-2012, 10:12 PM   #7
Member
 
Join Date: Dec 2011
Location: Livermore, California
Posts: 265
Rewards Points: 250
Default

Mine Lights problem


Quote:
Originally Posted by Ryan2000 View Post
...I then need to be able to run thru them all again from the beginning. It also does not work by code and am using single conductor wires not romex.
I'm assuming this bit means that the sequence should work regardless of whether all the switches start in the up or down position.
a_lost_shadow is offline   Reply With Quote
Old 04-14-2012, 12:11 AM   #8
Member
 
Join Date: May 2008
Location: Apple Valley, MN, USA
Posts: 1,000
Rewards Points: 502
Send a message via AIM to theatretch85
Default

Mine Lights problem


Quote:
Originally Posted by Ryan2000 View Post
7 lights and 7 3-way switches

using single conductor wires not romex
Pretty sure this means single pole switches and double pole switches won't work here and use of 2 wire cable is irrelevant.
theatretch85 is offline   Reply With Quote
Old 04-14-2012, 05:41 AM   #9
Member
 
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 6,965
Rewards Points: 2,026
Default

Mine Lights problem


In the following diagram there are 7 switch boxes each with two 3 way switches. Separate switches (separate handles) are preferable to double pole double throw switches since the latter will result in having unwanted combinations of turning other lights on when you wanted to turn both lights off.

The red lines are single conductors to the switch common terminals (accompanied by neutral). The blue lines are paired travelers (accompanied by neutral).
Attached Thumbnails
Mine Lights problem-lights15.jpg  
__________________
Forget super sized fries. The Washington Redskins could promote healthy eating with First Lady Obama by choosing a (red skinned) turnip for a mascot.

Last edited by AllanJ; 04-14-2012 at 05:46 AM.
AllanJ is offline   Reply With Quote
Old 04-14-2012, 09:22 AM   #10
Member
 
joed's Avatar
 
Join Date: Mar 2005
Location: Welland, Ontario
Posts: 7,852
Rewards Points: 2,498
Blog Entries: 4
Default

Mine Lights problem


Question has been around for long time. Here is the solution I have seen.

__________________
Do not PM with questions that can be asked in a forum. I will not respond.
joed is offline   Reply With Quote
Old 04-16-2012, 01:36 AM   #11
Member
 
Join Date: Dec 2011
Location: Livermore, California
Posts: 265
Rewards Points: 250
Default

Mine Lights problem


Alright, I figure the OP has had enough time to come up with his/her own solution. Here's the solution I came up with. I believe it meets the requirements of the sequence given, only 7 3 way switches, and the sequence holds true regardless of if the starting state is all switches up or all switches down. And as hinted, it's horribly code non-compliant.
Attached Thumbnails
Mine Lights problem-electrical-dwarf-puzzle.jpg  

a_lost_shadow is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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
IC can lights still a problem in my 2001 build? ls3c6 Electrical 2 01-12-2012 01:05 PM
Problem with Christmas lights burning out asugrads Electrical 21 12-20-2011 02:28 PM
Dimming Lights and Possible Neutral Problem carfan87 Electrical 26 12-19-2011 06:54 PM
4 Way Switch controlling 3 lights natenum Electrical 3 09-28-2011 07:46 AM
Use factory fog light switch for aftermarket lights? downunder Automotive Repairs 6 07-10-2010 11:45 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.