Freerails Home 
Home Search search Menu menu Not logged in - Login | Register

Freerails IS ACCEPTING new Members ... To join Freerails ... See how to Register as a Member in the 'Joining Freerails' Forum

Running Times
 Moderated by: . Page:  First Page Previous Page  1  2  3  4  5  6  Next Page Last Page  
New Topic Reply Printer Friendly
 Rating:  Rating
AuthorPost
 Posted: Sun Nov 11th, 2018 03:04 pm
  PMQuoteReply
11th Post
davecttr
Registered
 

Joined: Sat Nov 9th, 2013
Location: United Kingdom
Posts: 502
Status: 
Offline
The aerial detaching is the weak point of DelTang receivers. 
I have a couple that I should send back to DelTang for repair. 
Maybe an antenna on the PCB might help?

Pololu do reduction regulators as well so how about attaching one to the turntable power supply. 
Or maybe a USB supply giving about 5V?




____________________
Dave
Back To Top

 Posted: Sun Nov 11th, 2018 05:35 pm
  PMQuoteReply
12th Post
Helmut
Registered


Joined: Sun Feb 17th, 2013
Location: Friedberg, Germany
Posts: 1138
Status: 
Offline
An antenna on the PCB only eats up space and will be problematic when using metal housings. 

It is all a matter of the price a customer is willing to pay for a product, because the u.fl socket is not cheap






____________________
Regards, H.
Back To Top

 Posted: Tue Nov 13th, 2018 05:35 pm
  PMQuoteReply
13th Post
dan3192
Registered
 

Joined: Thu Oct 14th, 2010
Location: Connecticut USA
Posts: 228
Status: 
Offline
I've also had aerials breaking off. 

DelTang seems to have resolved the problem by simply using heavier wire like Rx102 below, and on others like Rx65.  

Hopefully new versions of popular receivers will see the same fix.







-Dan


Back To Top

 Posted: Tue Nov 13th, 2018 09:32 pm
  PMQuoteReply
14th Post
dan3192
Registered
 

Joined: Thu Oct 14th, 2010
Location: Connecticut USA
Posts: 228
Status: 
Offline
With my HO Scale GP35 loco I get about 8-10 hrs run time. 

This is at medium to slow speeds during operating sessions typically pulling a string of about 12 hopper cars or box cars.

The setup includes a Panasonic 18650, 3400mAh Li-ion battery, 5V step-up voltage regulator, a DelTang Rx61 receiver and a 12V 20x14x32mm can motor.

The power chassis is a standard 8-wheel drive Hobbytown drive.

There is no lighting at the present time.

Dan

   


Back To Top

 Posted: Tue Nov 13th, 2018 09:47 pm
  PMQuoteReply
15th Post
Rod Hutchinson
Registered


Joined: Fri May 8th, 2009
Location: Mooroolbark, Australia
Posts: 478
Status: 
Offline
Nicely set up. 

I normally use a 9v step converter.









____________________
Rod Hutchinson
Mooroolbark, Australia
Back To Top

 Posted: Tue Nov 13th, 2018 10:04 pm
  PMQuoteReply
16th Post
dan3192
Registered
 

Joined: Thu Oct 14th, 2010
Location: Connecticut USA
Posts: 228
Status: 
Offline
The China-made regulator was recently found to be faulty and putting out only 3.7V, which caused unacceptably slow operating speeds. 

A 9V Pololu regulator is being installed along with an induction coil for on-board wireless charging.

Dan




Back To Top

 Posted: Wed Nov 14th, 2018 02:50 am
  PMQuoteReply
17th Post
Rod Hutchinson
Registered


Joined: Fri May 8th, 2009
Location: Mooroolbark, Australia
Posts: 478
Status: 
Offline
I have been using Pololu 9v step up on old open frame Mashima motors with nice results.









____________________
Rod Hutchinson
Mooroolbark, Australia
Back To Top

 Posted: Wed Nov 14th, 2018 07:18 am
  PMQuoteReply
18th Post
davecttr
Registered
 

Joined: Sat Nov 9th, 2013
Location: United Kingdom
Posts: 502
Status: 
Offline
With a single battery giving a nominal 3.3V a 5V Pololu regulator will give you 85% or better efficiency with a 350 to 400mA loco. 

However a 9V Pololu is marginal at 300mA (80%) and bad with a 12 Pololu with less than 75% efficiency. 

The efficiency is a function of voltage in/out and loco power draw. 

The graphs are on the Pololu site.




____________________
Dave
Back To Top

 Posted: Wed Nov 14th, 2018 07:29 am
  PMQuoteReply
19th Post
Rod Hutchinson
Registered


Joined: Fri May 8th, 2009
Location: Mooroolbark, Australia
Posts: 478
Status: 
Offline
My setup is a 2S configuration, so jump is 7.4v to 9v.  

However a friend is using 3.7v to 9v.  

For the type of running we do the efficiency is offset by the simplicity of a 1S wiring.





____________________
Rod Hutchinson
Mooroolbark, Australia
Back To Top

 Posted: Wed Nov 14th, 2018 01:32 pm
  PMQuoteReply
20th Post
bobquincy
Registered


Joined: Sun Jan 27th, 2013
Location: Florida USA
Posts: 276
Status: 
Offline
3 V motors eliminate the need for step-up converters so we get simpler wiring and at least 15% more run time. 

 I get 3 V can and coreless motors on the bay for decent prices.






____________________
Monorail modelers have a one track mind.
Back To Top


 Current time is 05:44 am
Page:  First Page Previous Page  1  2  3  4  5  6  Next Page Last Page  

Top



UltraBB 1.172 Copyright © 2007-2016 Data 1 Systems