turnout control circuit

[SORNJS]

I designed a turnout control circuit cicra 1985 that worked with tortouse units and i believed was based on Forrest Mims' radio shack booklet on operational amplifiers.

The circuit used two momentary pushbuttons,

#1 provided + voltage to the tortoise

#2 provided - voltage to the tortoise

When used in a yard/lader situtation, the button pushed changed all required turnouts to get in or out of that track to the required direction.

My 30 year old memory, not so good.

I do recall the circuit was simple with few parts.

Any help would be appreciated

 

 

[zstripe]

Sornjs,

Do You recall what book it was in? There are many books out by Him:

https://www.google.com/search?q=forrest+mims+circuit+scrapbook+pdf&safe=active&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjCgqr_8LHYAhVmct8KHc3xD5UQsAQIQg&biw=1229&bih=587#imgrc=zCOJNFloWNdFqM:

He used to have circuits in the  Popular Mechanics/Science/ Electronics Mags of long ago.

Good Luck! 

Frank 

[RR_Mel]

Check my Google Drive and see if this is the book your looking for.  The link below is a sharable link and should work.

 

 

https://drive.google.com/file/d/1nccR7XFOBR8-Cz-Upis8Zl4-h4Sc79tN/view?usp=sharing

 

 

 

Mel

 

Modeling the early to mid 1950s SP in HO scale since 1951

 

 

My Model Railroad   

http://melvineperry.blogspot.com/

 

Bakersfield, California

 

I'm beginning to realize that aging is not for wimps.

 

[rrinker]

 To operate a Tortoise via two pushbuttons would need something more like a flip-flop than an opamp. 

 There was one posted here in 2009, uses a 556 timer chip. Unfortunately the OP of that one has not decided to pay for Photobucket so his image links witht he schematic and board layout are all dead. 

 However - it's a basic 556 circuit and of course Rob Paisley has the same thing:

http://www.circuitous.ca/556Stall08.html

Doesn't get much simpler, a 556 and 2x 10K resistors per switch machine. Push one button, Tortoise moves one way, push the other, it moves the opposite way.

                                           --Randy

 

[gregc]

SORNJS

When used in a yard/lader situtation, the button pushed changed all required turnouts to get in or out of that track to the required direction.

latching the pushbutton can control a single turnout, but isn't more logic required to control multiple turnouts on a yard ladder?

Design procedure for yard ladder control using slow-motion switch motors (but there may be better ways of doing this).

while the above uses a dual-pole rotary switch, sounds like you're interested in a single button to align all the turnouts to a particular yard track?

[BroadwayLion]

Push Buttons... BAH!

 

Big boys go with BIG TOYS!

 

ROAR

[richhotrain]

There is more recent circuitry to do what you want to do.

I power my Tortoises from a DC power pack.

I control my passenger station yard ladder with an NCE Mini Panel and a series of momentary push buttons mounted on a control panel.

Each push button controls the entire route (multiple Tortoise controlled turnouts) into a specified station track on the ladder. The Mini Panel is programmed to automatically select the route when a particular momentary button is pushed on the control panel.

Rich