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

Because of non-railroad abuse of the site, new members MUST use their first names (at least) to join NO EXCEPTIONS!

Radio Control
 Moderated by: W C Greene Page:  First Page Previous Page  ...  107  108  109  110  111  112  113  114  115  Next Page Last Page  
New Topic Reply Printer Friendly
 Rating:  Rating
AuthorPost
 Posted: Sat Apr 15th, 2017 01:29 am
  PMQuoteReply
1111th Post
Si.
Super Moderator


Joined: Thu Feb 23rd, 2012
Location: London
Posts: 3129
Status: 
Offline
You can actually buy the bare OEM Rx. & Tx. boards...

...no car, no Tx. case etc.


For only £2.25p ( about $3 bucks ! ) for the pair ! :shocked:


:moose:


Si.



____________________

' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
Back To Top

 Posted: Sat Apr 15th, 2017 02:29 am
  PMQuoteReply
1112th Post
Michael M
Registered


Joined: Thu Jan 26th, 2017
Location: San Bernardino, California USA
Posts: 168
Status: 
Offline
This looks similar to the 1/24 scale car you're looking at.  Takes 4.5 volts in the car.

http://www.ebay.com/itm/1-24-Officially-Licensed-RC-Lamborghini-Veneno-Sport-Racing-Car-W-27MHz-Control/262932418452?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D2%26asc%3D40130%26meid%3Dbf2757c7b570466e977160ce434cb553%26pid%3D100005%26rk%3D3%26rkt%3D6%26sd%3D152477217719



____________________
Michael
Back To Top

 Posted: Sat Apr 15th, 2017 01:34 pm
  PMQuoteReply
1113th Post
Bob R
Registered


Joined: Thu Nov 20th, 2014
Location: Papillion, Nebraska USA
Posts: 240
Status: 
Offline
Si
I use Pololu step up regulators.  They are available in various voltage and amperage ranges.  Because I am working with limited space and desire to keep cost low, I use their U3V12F9 regulator.  Its input voltage is 3-10 volt and output is 9 volts.  I think the amp load is 1.1 amp.  If overloaded it just shuts off and restarts after load is reduced.  Pulling the loads I pull that is never an issue.  As you could see in the pictures it is tiny.  Cost is $3.95.
Look online for Pololu Robotics and search electronics, voltage regulators, part no. U3V12F9.
Lots of other interesting stuff on their site.
Bob

Last edited on Sat Apr 15th, 2017 01:35 pm by Bob R



____________________
Bob
Back To Top

 Posted: Sat Apr 15th, 2017 03:05 pm
  PMQuoteReply
1114th Post
Si.
Super Moderator


Joined: Thu Feb 23rd, 2012
Location: London
Posts: 3129
Status: 
Offline
Thanks very much Bob.


I'll look 'em up & check 'em out.


:moose:


Si.



____________________

' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
Back To Top

 Posted: Sat Apr 15th, 2017 03:30 pm
  PMQuoteReply
1115th Post
chasv
Registered


Joined: Mon Oct 24th, 2011
Location: Riverside, California USA
Posts: 852
Status: 
Offline
you need to remember that most of the small cars run on 3 volts so you might have problems with an older loco but replacing the tiny battery with even aa batteries will help I ran a ho plymouth switcher went like a rocket with 2 aas



____________________

Charles
Back To Top

 Posted: Sat Apr 15th, 2017 09:30 pm
  PMQuoteReply
1116th Post
Michael M
Registered


Joined: Thu Jan 26th, 2017
Location: San Bernardino, California USA
Posts: 168
Status: 
Offline
I took a look at that Pololu regulator: http://www.robotshop.com/en/9v-step-up-voltage-regulator-u3v12f9.html

That regulator is crazy small.  Since I'm close to being dumb as dirt when it comes to electronics (I'm cell phone challenged) just how would be wired up?  Since it's so small can you solder connections without creating one blob of solder?  If I understand correctly you could install a 3.7 volt LiPo and the regulator would step it up to 9 volts?  I do like the idea, especially since it's so tiny.



____________________
Michael
Back To Top

 Posted: Sat Apr 15th, 2017 09:37 pm
  PMQuoteReply
1117th Post
Michael M
Registered


Joined: Thu Jan 26th, 2017
Location: San Bernardino, California USA
Posts: 168
Status: 
Offline
I found something similar on eBay: http://www.ebay.com/itm/10-20W-DC-DC-Boost-Step-up-Converter-Regulator-Power-Module-5v-6v-9v-12v-15-24V-/282266957145?var=&hash=item41b86bf559:m:mCxdJrq8mrgimDx2rprV0fQ

Would this work the same way?  It's still on the small size, and for only a couple of bucks it would be worth playing with.  Again, why not just install a small 3.7 volt LiPo and use the regulator to boost the current?



____________________
Michael
Back To Top

 Posted: Sun Apr 16th, 2017 12:40 am
  PMQuoteReply
1118th Post
Bob R
Registered


Joined: Thu Nov 20th, 2014
Location: Papillion, Nebraska USA
Posts: 240
Status: 
Offline
Michael,
Answer to your questions......
Wiring is as shown in picture at post 1101.  Very simple.  The board is small but not difficult to solder wires to.  The solder holes are on the edge and if you use a pencil tip iron very easy.  I use a 1/4" wide flat tipped iron and never have had a problem.
The boards are available in various outputs.  I use the 9 volt for most of my engines as they have 12 volt motors.  9 volts runs plenty fast.  You can also get 6 volt and 12 volt.
Be aware that efficiency is lost when the voltage is stepped up.  The more you step up the less the efficiency ( ie 3.7v to 9 v will not run as long on a charge as 7.4v to 9v given same capacity battery ).
The item you found on ebay is much larger.  It is avilable with variable output settings.  The 4 amp rating capability causes size to be bigger.  The output you need and amperage draw of your engine will determine what you should use.  Most HO, On30 and 1/35th like Woodies have amp draw of less than 1 amp so the small stuff works fine.
In my opinion the best setup is using a 2S 7.4v battery stepped to 9v if needed.  The efficiency is very high and run times will be good.  
Bob

Last edited on Sun Apr 16th, 2017 12:44 am by Bob R



____________________
Bob
Back To Top

 Posted: Sun Apr 16th, 2017 01:02 am
  PMQuoteReply
1119th Post
Michael M
Registered


Joined: Thu Jan 26th, 2017
Location: San Bernardino, California USA
Posts: 168
Status: 
Offline
Bob,

Okay, went back to post 1101.  Making a little more sense now.  Question: Does it matter where you put the regulator?  Couldn't you just as well put it after the receiver?



____________________
Michael
Back To Top

 Posted: Sun Apr 16th, 2017 03:54 am
  PMQuoteReply
1120th Post
Bob R
Registered


Joined: Thu Nov 20th, 2014
Location: Papillion, Nebraska USA
Posts: 240
Status: 
Offline
Michael M wrote: Bob,

Okay, went back to post 1101.  Making a little more sense now.  Question: Does it matter where you put the regulator?  Couldn't you just as well put it after the receiver?
No.  If after the receiver it would essentially eliminate your throttle.  You apply a little throttle and it would boost it to 9 volts.
Bob



____________________
Bob
Back To Top


 Current time is 12:58 pm
Page:  First Page Previous Page  ...  107  108  109  110  111  112  113  114  115  Next Page Last Page  

Top



UltraBB 1.172 Copyright © 2007-2016 Data 1 Systems