Date   
Re: Magnetic Reed Switches

Paul O
 

Ric, a couple more sites:

http://www.explainthatstuff.com/howreedswitcheswork.html



http://www.reed-sensor.com/Notes/



Just do a Google search on "reed switches".



Paul O



From: WiringForDCC@... [mailto:WiringForDCC@...] On
Behalf Of Eric
Sent: Monday, April 15, 2013 2:47 PM
To: WiringForDCC@...
Subject: [WiringForDCC] Magnetic Reed Switches





I would like to use reed switches to control battery powered LEDs in my
passenger cars. I need some help understanding what type on switches to buy
and just how they work using an external magnet. Help greatly appreciated.

RicZ

Something a Little Different

Glenn
 

This is probably way off the DCC topic.

Can a DCC auto reverser be use on a DC track to change the direction of a
trolley?

I know there are such animals out there, but try finding one in this DCC
world. I have tried searching the web, but always seem to come back to DCC
products.

Logic tells me that if I wire one end (R) stopping section opposite of the
main (M) track the auto reverse module will reverse the polarity of the
main. My problem is how to wire the stopping section on the other (L) end.

My logic brain says it should be opposite the R end. The main track should
be the one that changes polarity.

Like this:

L M R Tripped> L M R
- - + - + +
+ + - + - -

Glenn

Re: Something a Little Different

Vollrath, Don <dvollrath@...>
 

The simple answer is No as the DCC auto-reversers operate from the fixed DCC voltage and short circuit amps of the track bus. The typical adjustable DC supply for the trolley won't work.

If you are talking about a single main track with a balloon loop at each end, then yes it is the main line and the turnouts at each end that need to reverse in polarity to have a DC trolley run the other direction. An opto-detector at each end and a latching relay can be used to change the track polarity and flip the turnouts just as the trolley approaches the exit end of the constant polarity loops. Need a 4PDT relay or 2 relays... one to control main track direction, the second to throw both turnout motors so that the trolley always enters and exits the end loops in the same direction. There are other gadgets you can purchase to do just that. Google it to see what is out there.

DonV

-----Original Message-----
From: WiringForDCC@... [mailto:WiringForDCC@...] On Behalf Of Glenn
Sent: Monday, April 15, 2013 2:54 PM
To: WiringForDCC@...
Subject: [WiringForDCC] Something a Little Different

This is probably way off the DCC topic.

Can a DCC auto reverser be use on a DC track to change the direction of a trolley?

I know there are such animals out there, but try finding one in this DCC world. I have tried searching the web, but always seem to come back to DCC products.

Logic tells me that if I wire one end (R) stopping section opposite of the main (M) track the auto reverse module will reverse the polarity of the main. My problem is how to wire the stopping section on the other (L) end.

My logic brain says it should be opposite the R end. The main track should be the one that changes polarity.

Like this:

L M R Tripped> L M R
- - + - + +
+ + - + - -

Glenn



------------------------------------

http://www.WiringForDCC.comYahoo! Groups Links

Re: Something a Little Different

Flash Gordon
 

Glen,

I do not think it will work. DCC runs with AC not DC ..... the DC in DCC does not stand for DC. Is that complicated to say or what.

Ed S

At 03:54 PM 4/15/2013, you wrote:


This is probably way off the DCC topic.

Can a DCC auto reverser be use on a DC track to change the direction of a
trolley?

I know there are such animals out there, but try finding one in this DCC
world. I have tried searching the web, but always seem to come back to DCC
products.

Logic tells me that if I wire one end (R) stopping section opposite of the
main (M) track the auto reverse module will reverse the polarity of the
main. My problem is how to wire the stopping section on the other (L) end.

My logic brain says it should be opposite the R end. The main track should
be the one that changes polarity.

Like this:

L M R Tripped> L M R
- - + - + +
+ + - + - -

Glenn

Re: Magnetic Reed Switches

Thomas
 

Eric
You might find this article by Dave Bodnar interesting.
http://trainelectronics.com/LED_Articles_2007/LEDs_for_Coaches/index.htm
Part way down the page he talks about reed switches.
Tom
 


________________________________
From: Eric <ezrails@...>
To: WiringForDCC@...
Sent: Monday, April 15, 2013 2:47 PM
Subject: [WiringForDCC] Magnetic Reed Switches
 


 

I would like to use reed switches to control battery powered LEDs in my passenger cars.
 


[Non-text portions of this message have been removed]

Re: Magnetic Reed Switches

Eric
 

Thanks Kevin and Paul,
How would I set up the reed switch to turn on the LEDs by passing a magnet over the car, and then turning them off by passing the magnet over the car a second time? I plan to use 3v coin cell batteries to power a couple of LEDs, but I need to be able to turn them off when the session is complete.

RicZ

--- In WiringForDCC@..., "Paul O" <pomilian@...> wrote:

Ric, a couple more sites:

http://www.explainthatstuff.com/howreedswitcheswork.html



http://www.reed-sensor.com/Notes/



Just do a Google search on "reed switches".



Paul O



From: WiringForDCC@... [mailto:WiringForDCC@...] On
Behalf Of Eric
Sent: Monday, April 15, 2013 2:47 PM
To: WiringForDCC@...
Subject: [WiringForDCC] Magnetic Reed Switches





I would like to use reed switches to control battery powered LEDs in my
passenger cars. I need some help understanding what type on switches to buy
and just how they work using an external magnet. Help greatly appreciated.

RicZ





[Non-text portions of this message have been removed]

Re: Magnetic Reed Switches

Kenneth Burr
 

When selecting a reed switch make sure that it is the latching type, or else you will need to keep the magnet near by in order to keep the switch either in the on position or off position, otherwise the reed switch will revert back to the previous state as soon as the magnet is removed.  While I have been able to find such switches in the past, I have not been able to find a current source for such switches.  As a result I am using latching sold state hall effect sensors in place of reed switches.  These sensors latch on when one pole of the magnet is brought near them, and then stay on even after the magnet is removed.  To turn the hall effect sensor off, then the other pole of the magnet is brought near the sensor, and the sensor will then stay off until such time later as the other pole of the magnet is brought near the sensor.
Ken Burr




________________________________
From: Eric <ezrails@...>
To: WiringForDCC@...
Sent: Monday, April 15, 2013 5:45 PM
Subject: [WiringForDCC] Re: Magnetic Reed Switches



 
Thanks Kevin and Paul,
How would I set up the reed switch to turn on the LEDs by passing a magnet over the car, and then turning them off by passing the magnet over the car a second time? I plan to use 3v coin cell batteries to power a couple of LEDs, but I need to be able to turn them off when the session is complete.

RicZ

--- In WiringForDCC@..., "Paul O" <pomilian@...> wrote:

Ric, a couple more sites:

http://www.explainthatstuff.com/howreedswitcheswork.html



http://www.reed-sensor.com/Notes/



Just do a Google search on "reed switches".



Paul O



From: WiringForDCC@... [mailto:WiringForDCC@...] On
Behalf Of Eric
Sent: Monday, April 15, 2013 2:47 PM
To: WiringForDCC@...
Subject: [WiringForDCC] Magnetic Reed Switches





I would like to use reed switches to control battery powered LEDs in my
passenger cars. I need some help understanding what type on switches to buy
and just how they work using an external magnet. Help greatly appreciated.

RicZ









[Non-text portions of this message have been removed]

Re: Magnetic Reed Switches

Flash Gordon
 

RicZ,

The reed switch does not work that way. You would have to leave the magnet in place to turn them off. So you would need a Normally Closed Reed Switch (NC).

I am thinking about putting AAA rechargeable batteries in the car, with contacts out the bottom that would brush along a 4th and 5th rail under the car when it is in a terminal to pick up passengers. This would recharge the batteries with no human intervention. Also cool that the lights would stay on when you shut down the layout until the batteries discharged. In operation some cars may be on some off as in a real passenger train.

Ed S

At 06:45 PM 4/15/2013, you wrote:


Thanks Kevin and Paul,
How would I set up the reed switch to turn on the LEDs by passing a magnet over the car, and then turning them off by passing the magnet over the car a second time? I plan to use 3v coin cell batteries to power a couple of LEDs, but I need to be able to turn them off when the session is complete.

RicZ

Re: Magnetic Reed Switches

Scott H. Haycock
 

Ed,
Isn't RickZ's idea the way Rapido passenger car lighting works?


Scott Haycock
Modeling Tarheel country in the Land of Enchantm ent

----- Original Message -----





RicZ,

The reed switch does not work that way. You would have to leave the
magnet in place to turn them off. So you would need a Normally Closed
Reed Switch (NC).


Ed S





[Non-text portions of this message have been removed]

Re: Something a Little Different

Al Silverstein <silversteina@...>
 

Glen,

You might want to check out the Circuitron AR-1 and AR-2 Automatic Reversing Circuits. I have seen these used where a DC trolley moves back and forth between two points on a trolley line on layouts were the trains are running on DCC on the railroad tracks. .

Al Silverstein

----- Original Message -----
From: "Glenn" <ghazel@...>
To: <WiringForDCC@...>
Sent: Monday, April 15, 2013 3:54 PM
Subject: [WiringForDCC] Something a Little Different


This is probably way off the DCC topic.

Can a DCC auto reverser be use on a DC track to change the direction of a
trolley?

I know there are such animals out there, but try finding one in this DCC
world. I have tried searching the web, but always seem to come back to DCC
products.

Logic tells me that if I wire one end (R) stopping section opposite of the
main (M) track the auto reverse module will reverse the polarity of the
main. My problem is how to wire the stopping section on the other (L) end.

My logic brain says it should be opposite the R end. The main track should
be the one that changes polarity.

Like this:

L M R Tripped> L M R
- - + - + +
+ + - + - -

Glenn

Re: Something a Little Different

wirefordcc
 

Glenn,



If your goal is to have a trolley stop at two end points, wait a while, than
reverse, see my cubicle train at:





http://www.wiringfordcc.com/cubicle_main.htm



It only works with a DC trolley (not a DCC) one.



The whole thing works without sensors and works with only two wires to the
track.



Allan

Wiring For DCC





From: WiringForDCC@... [mailto:WiringForDCC@...] On
Behalf Of Glenn
Sent: Monday, April 15, 2013 2:54 PM
To: WiringForDCC@...
Subject: [WiringForDCC] Something a Little Different





This is probably way off the DCC topic.

Can a DCC auto reverser be use on a DC track to change the direction of a
trolley?

I know there are such animals out there, but try finding one in this DCC
world. I have tried searching the web, but always seem to come back to DCC
products.

Logic tells me that if I wire one end (R) stopping section opposite of the
main (M) track the auto reverse module will reverse the polarity of the
main. My problem is how to wire the stopping section on the other (L) end.

My logic brain says it should be opposite the R end. The main track should
be the one that changes polarity.

Like this:

L M R Tripped> L M R
- - + - + +
+ + - + - -

Glenn

Re: Magnetic Reed Switches

Flash Gordon
 

Scott,

I am not familiar with Rapido cars.... how do they work?

Ed S

--- In WiringForDCC@..., "Scott H. Haycock " <shhaycock@...> wrote:

Ed,
Isn't RickZ's idea the way Rapido passenger car lighting works?


Scott Haycock

Re: Magnetic Reed Switches

Scott H. Haycock
 

Ed,
They work by waving a magnetic wand over the roof of the car to turn the battery powered lights on and off. Se: http://www.rapidotrains.com/light_ho.html


Scott Haycock
Modeling Tarheel country in the Land of Enchantm ent

----- Original Message -----





Scott,

I am not familiar with Rapido cars.... how do they work?

Ed S





[Non-text portions of this message have been removed]

Re: Magnetic Reed Switches

Michael <mckeevermichael@...>
 

Why not just buy the Rapido Easy Peasy Lights for your Scale?:
http://www.rapidotrains.com/light_ho.html or
http://www.rapidotrains.com/light_n.html

R/S,
Mac in SoCal, N Scale, ATSF, SP, UP in Transition Era, Barstow Area

--- In WiringForDCC@..., "Eric" <ezrails@...> wrote:

I would like to use reed switches to control battery powered LEDs in my passenger cars. I need some help understanding what type on switches to buy and just how they work using an external magnet. Help greatly appreciated.

RicZ

Re: Magnetic Reed Switches

Paul O
 

RicZ

This appears to be what you're looking for:

http://tinyurl.com/d65fjlx

Latching reed sensor, operated with a magnet.



MK06-10-E Available for about $6 from Digi-Key:

http://tinyurl.com/bplypuu





Paul O





From: WiringForDCC@... [mailto:WiringForDCC@...] On
Behalf Of Eric
Sent: Monday, April 15, 2013 6:46 PM
To: WiringForDCC@...
Subject: [WiringForDCC] Re: Magnetic Reed Switches





Thanks Kevin and Paul,
How would I set up the reed switch to turn on the LEDs by passing a magnet
over the car, and then turning them off by passing the magnet over the car a
second time? I plan to use 3v coin cell batteries to power a couple of LEDs,
but I need to be able to turn them off when the session is complete.

Re: Something a Little Different

Glenn
 

Thanks to all for your inputs.

It will work, I tried an experiment, but it failed some what. The trolley
runs like a jack rabbit doing wheelies in one direction.

The pack I was using was a cheapie, so I had little control over the voltage
input. But I think lowering the input from a transistorized pack will slow
down the trolley without affecting the performance of the AR. My experience
with IC circuitry tells me most IC's operate on about 5vdc. The 12V input of
DCC AR's is probably just DCC default.

Thank you Alan for the Cubicle Circuit, I may just have a similar one on a
bread board in my electronics Junk Box.

Glenn

-----Original Message-----
From: WiringForDCC@... [mailto:WiringForDCC@...] On
Behalf Of Vollrath, Don
Sent: Monday, April 15, 2013 16:19
To: WiringForDCC@...
Subject: RE: [WiringForDCC] Something a Little Different

The simple answer is No as the DCC auto-reversers operate from the fixed DCC
voltage and short circuit amps of the track bus. The typical adjustable DC
supply for the trolley won't work.

Large HO layout - multiple circuits for boosters

Walt <wfre@...>
 

Gents - we have a large club layout - HO www.gsmrm.org.

We have 4 distributed sets of boosters, 2 boosters each sub-loco region.

I'm getting a loco pause, and sometimes an apparent short, at the track interface of 2 different sets of boosters. The boosters are on different circuit breakers. The power feeds to each set are in synch. We do not have a ground feed on any set of boosters - ground is through a solid conduit.

Is this a source for the issue above ?

TIA, Walt in Sausalito

Re: Large HO layout - multiple circuits for boosters

Vollrath, Don <dvollrath@...>
 

Walt,
Do you have a common wire between boosters? See http://www.wiringfordcc.com/track.htm#a27
Are all the boosters the same brand? Some boosters apparently delay the DCC control signal and/or are constructed differently inside are not compatible with those of other brands.
DonV

-----Original Message-----
From: WiringForDCC@... [mailto:WiringForDCC@...] On Behalf Of Walt
Sent: Friday, April 19, 2013 11:42 AM
To: WiringForDCC@...
Subject: [WiringForDCC] Large HO layout - multiple circuits for boosters

Gents - we have a large club layout - HO www.gsmrm.org.

We have 4 distributed sets of boosters, 2 boosters each sub-loco region.

I'm getting a loco pause, and sometimes an apparent short, at the track interface of 2 different sets of boosters. The boosters are on different circuit breakers. The power feeds to each set are in synch. We do not have a ground feed on any set of boosters - ground is through a solid conduit.

Is this a source for the issue above ?

TIA, Walt in Sausalito



------------------------------------

http://www.WiringForDCC.comYahoo! Groups Links

Re: Large HO layout - multiple circuits for boosters

Walt <wfre@...>
 

All Digitrax Duplex DB200+ Opto-isolated (HO ex-DC common rail wiring).

My issue is running from Booster B on left to Booster A on right.

Where is the ground connection on Digitrax boosters - just one of the 4 outside screws ?

Tx for your interest.

Walt

--- In WiringForDCC@..., "Vollrath, Don" <dvollrath@...> wrote:

Walt,
Do you have a common wire between boosters? See http://www.wiringfordcc.com/track.htm#a27
Are all the boosters the same brand? Some boosters apparently delay the DCC control signal and/or are constructed differently inside are not compatible with those of other brands.
DonV

Re: Large HO layout - multiple circuits for boosters

Carl
 

Hello Walt:

I had a similar problem with two Digitrax boosters. The answer was to
reverse one of the Digitrax AC adapters input to the Booster. Yes, I
know the AC is rectifiedas soon as it enters the booster, but this fixed
the problem.

And if grounding the booster is so important, why didn't they provide a
proper terminal? Use a screw the holds the cover on?? Please.

Carl.