Go Back  R/C Tech Forums > General Forums > Electric On-Road
7.2V Servo Direct From Battery >

7.2V Servo Direct From Battery

7.2V Servo Direct From Battery

Old 05-07-2007, 06:25 PM
  #1  
Tech Elite
Thread Starter
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,912
7.2V Servo Direct From Battery

Having tried using a motor fan running directly from the battery I noticed it stopped under full power, presumably due to the current draw.

What's to stop a 7.2V servo from having the same problem when wired through a choke to the battery +?

Will it not have the same problem as it only connects too the positive?

In ask as I use a 7.2V servo and a new Nosram brushless speedo doesn't have FET wire

Skiddins
Skiddins is offline  
Old 05-07-2007, 06:34 PM
  #2  
tel
Tech Adept
iTrader: (9)
 
Join Date: Feb 2004
Location: Chandler,AZ
Posts: 233
Trader Rating: 9 (100%+)
Default

The fans stop because most of the fans sold from RC companies are rated for 5V. Running off of 5 or 6V BEC circuit from ESC or reciever they work fine. These fans typically are brushless DC and the controller burns up. To run direct from battery you need to get a 12V rated DC fan, the only problem with that is it will run slower than rated or won't run at all.

As for the servo, check the manufacturers documents for input support for 7.2V from battery. Some servo's come with extra wire to connect direct from battery. Each manufacturer may have a limit to voltage seen on that connection.
tel is offline  
Old 05-08-2007, 06:29 AM
  #3  
Tech Elite
Thread Starter
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,912
Default

Originally Posted by tel
The fans stop because most of the fans sold from RC companies are rated for 5V. Running off of 5 or 6V BEC circuit from ESC or reciever they work fine. These fans typically are brushless DC and the controller burns up. To run direct from battery you need to get a 12V rated DC fan, the only problem with that is it will run slower than rated or won't run at all.

As for the servo, check the manufacturers documents for input support for 7.2V from battery. Some servo's come with extra wire to connect direct from battery. Each manufacturer may have a limit to voltage seen on that connection.
Cheers, I believe the servo is a KO PDS-2123 (the sticker was missing when I got it but it does have metal gears)

Skiddins
Skiddins is offline  
Old 05-08-2007, 01:57 PM
  #4  
Tech Adept
iTrader: (1)
 
Join Date: Sep 2004
Location: UK
Posts: 108
Trader Rating: 1 (100%+)
Default 2123

Hi
Just to let you know I have been running a 2123 in the fashion you describe for the last 3 years and it is stil going strong
Mark
mark34 is offline  

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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 On
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.