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

'DelTang' 2.4 GHz Receivers
 Moderated by: . Page:  First Page Previous Page  ...  5  6  7  8  9  10  11  12  13  14  15  ...  Next Page Last Page  
New Topic Printer Friendly
 Rating:  Rating
AuthorPost
 Posted: Sun Oct 21st, 2012 02:00 pm
   
91st Post
W C Greene
Moderator


Joined: Fri May 4th, 2007
Location: Royse City, Texas USA
Posts: 8100
Status: 
Offline
David-the KYOSHO MINI Z RACER boards handle 3 cell, 11.1 volts. I have some in my locos but run with 7.4 volts. My friend has a Kyosho board powered by a 3 cell 11.1 volt in his Athearn HO lashup. It is used for industrial switching and is capable of hauling 10-12 modern 80 foot cars up a 2% grade and requires recharging after about 6 hours. Kyosho does not sell the 27 MHZ boards any more but the cars may be found on the net. They now have 2.4 GHZ and the boards can handle the voltage/amperage. And yes, it is a receiver/ESC board about the suze of a normal DCC board.By the way, that Athearn loco is a "70's" loco with old style motor. The LOSI boards I use now (they are available for less than $40 USD) run with 7.4 volts and a coupe of friends use rechargable 9 volt batteries with them in On30 locos. Why do I run 7.4 volts? When I was running DC, I never ran my locos over about 6 volts so the voltage is just right for my r/c locos. How long does a Losi board last? My 2 original locos have their original boards-over 10 years.
Just my experience with "off the shelf" products.
Woodie



____________________
It doesn't matter if you win or lose, its' how you rig the game.
Back To Top

 Posted: Sun Oct 21st, 2012 02:11 pm
   
92nd Post
DavidT
Registered
 

Joined: Wed May 2nd, 2012
Location: United Kingdom
Posts: 456
Status: 
Offline
Good to know.
Thanks, David.

Back To Top

 Posted: Sun Oct 21st, 2012 10:26 pm
   
93rd Post
Horny Dublo
Registered
 

Joined: Sat Oct 20th, 2012
Location: Wokingham, United Kingdom
Posts: 26
Status: 
Offline
I knew I was in the right place - Great information there Woodie - So I could probably get away with 2S Lipo - 7.4v or even 9v PP9 nimh, which I had not thought of .. That just leaves the receiver power and I think running this from 1 cell of the 2S Lipo is not ideal so David, Is there a micro BEC module which could be used or could this be incorporated into the ESC?  

I am also interested in your Tx modules - I have installed 2.4 Frsky 'hack' modules in several 40mhz wheel transmitters for cars and there were only 3 connections; ground, supply and ppm signal. I also have several 35mh stick transmitters with model memories, so if I sorted the supply for the receiver would this be a fairly straight forward mod?

Sorry for all the questions but this is getting very interesting .. :brill:

Thanks .. Andy

 

 



____________________
To Infirmity and Beyond ....
Back To Top

 Posted: Sun Oct 21st, 2012 11:46 pm
   
94th Post
W C Greene
Moderator


Joined: Fri May 4th, 2007
Location: Royse City, Texas USA
Posts: 8100
Status: 
Offline
Andy-you may be confusing the receiver/ESC which is in the loco with the transmitter which controls the receiver. At least it reads that way. My transmitters (old 2 stick and r/c car) run on 12 volts-either rechargable NICADs or plain old AA alkalines. I did convert one transmitter to use a 3 cell 11.1 volt L-Poly battery but got less charge time than I did with the locos so it was back to "regular" batteries. The older AM freqs are different in the US, the "surface" freqs are 27 MHZ AM (old style) and new stuff is 2.4 GHZ which bind the receiver and transmitter as David has explained.
David is to be applauded for venturing into this cutting edge (for model trains) technology. I hope more modelers will see the "light", radio control is indeed the future of this hobby. (Uh oh, I hear the mad townspeople with torches and pitchforks coming down the street!)
Ask questions and try the products, sitting around and waiting for everybody to "catch up" before jumping in could be like "Waiting for Godot"...he won't be here today, or tomorrow either.

Woodie



____________________
It doesn't matter if you win or lose, its' how you rig the game.
Back To Top

 Posted: Mon Oct 22nd, 2012 12:43 am
   
95th Post
mwiz64
Registered


Joined: Mon Mar 26th, 2012
Location: Fenton, Michigan USA
Posts: 1329
Status: 
Offline
Just a thought but in RC circles the word transmitter is abbreviated as TX and receiver is abbreviated as RX. It can make typing go faster if nothing else.

Mike



____________________
Mike
Back To Top

 Posted: Mon Oct 22nd, 2012 08:04 am
   
96th Post
Horny Dublo
Registered
 

Joined: Sat Oct 20th, 2012
Location: Wokingham, United Kingdom
Posts: 26
Status: 
Offline
Sorry Woodie - What I meant to post was "I also have several 35mhz stick transmitters with model memories, so if I sorted the supply for the  Tx1-M module (not receiver) would this be a fairly straight forward mod?"

I have raced RC cars for nearly 40 years so am quite familiar with the technology and terminology - Just my enthusiasm taking over my typing and articulation  ... :thumb:

I share your enthusiam for RC in railway modelling, especially the smaller gauges and I agree it has to be the future - Having said that there are still many modellers who run traditional DC and have not moved to DCC so it will be a long haul ... But fun along the way .. :)


 



____________________
To Infirmity and Beyond ....
Back To Top

 Posted: Mon Oct 22nd, 2012 11:49 am
   
97th Post
DavidT
Registered
 

Joined: Wed May 2nd, 2012
Location: United Kingdom
Posts: 456
Status: 
Offline
Andy,
You can power ADD2 with a 2S lipo, a 9v PP3 or 7 nicads. You can power Rx41d from that if you use a 3.3 or 5v linear regulator or commercial UBEC. My Rx would not help you with low voltage protection in this scenario.

If I develop a higher voltage Rx with integrated ESC (not started yet) I would be hoping to make it suitable for use with something like 3-16v and would handle higher currents than I presently provide. It would not need external components and would protect the battery from being over-discharged.

Tx1-M is perfect for converting other transmitters into DSM2. If your host FM Tx has 8 nicads you probably need a 5v regulator or UBEC to power Tx1. An LM7805 comes to mind with appropriate caps. If you are making this then you need the same for the Rx in the train. The PPM signal to Tx1 must not exceed 3.6v. This is easily done with the 3.3v zener and 1k resistor as shown on my site. Maplin should have all the components.

In case you are interested, I'm making a 'Tx2' product. This will look identical to Tx1-M but will have the capability of connecting up to 7 potentiometers direct (no host Tx needed).
Regards, David.

Back To Top

 Posted: Mon Oct 22nd, 2012 12:06 pm
   
98th Post
Horny Dublo
Registered
 

Joined: Sat Oct 20th, 2012
Location: Wokingham, United Kingdom
Posts: 26
Status: 
Offline
"If I develop a higher voltage Rx with integrated ESC (not started yet) I would be hoping to make it suitable for use with something like 3-16v and would handle higher currents than I presently provide. It would not need external components and would protect the battery from being over-discharged"

And measure 9mm x 9mm x 1mm - ;)

Seriously David that sounds exactly what I am looking for - Put me on the list ... As well as for the Tx2 (Any idea on timescale?) I have just bought an Eflite mlp4dsm Tx to play around with so just working out my complete shopping list

 

Its a good Monday today ..

Thanks ..Andy 



____________________
To Infirmity and Beyond ....
Back To Top

 Posted: Mon Oct 22nd, 2012 12:23 pm
   
99th Post
DavidT
Registered
 

Joined: Wed May 2nd, 2012
Location: United Kingdom
Posts: 456
Status: 
Offline
Andy,
A 3S Rx will be a little bigger. I can use a combo MCU and RF chip for 1S lipos but higher voltages need separate components which will take up more space.

I have a working prototype of Tx2 with 1 pot. I'm scaling that up to more channels now. It's mainly just a softare challenge now so timing depends on how smoothly that goes and whether other stuff jumps the queue. It will probably take another two to three weeks.
dt.

Back To Top

 Posted: Mon Oct 22nd, 2012 01:42 pm
   
100th Post
Horny Dublo
Registered
 

Joined: Sat Oct 20th, 2012
Location: Wokingham, United Kingdom
Posts: 26
Status: 
Offline
Well, a small world it is - I jump on a US forum and find one of the contributors, David T lives a 10 minute walk away .....

One more question David - Is it possible to program the speed control to simulate the acceleration and braking of a 90ton loco?

Cheers .. Andy



____________________
To Infirmity and Beyond ....
Back To Top


 Current time is 02:57 am
Page:  First Page Previous Page  ...  5  6  7  8  9  10  11  12  13  14  15  ...  Next Page Last Page  

Top



UltraBB 1.172 Copyright © 2007-2016 Data 1 Systems