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  ...  4  5  6  7  8  9  10  11  12  13  14  ...  Next Page Last Page  
New Topic Printer Friendly
 Rating:  Rating
AuthorPost
 Posted: Fri Oct 19th, 2012 02:58 pm
   
81st Post
doctorphantom
Registered
 

Joined: Fri May 4th, 2012
Location: West Virginia USA
Posts: 29
Status: 
Offline
Mike, Bernd, & David,

I've been following this thread--exciting stuff.

I looked at the DelTang site and checked the Rx's. Very Impressive, David!

However, when I clicked on the "Buy" button on the DT Receivers page I was referred to either of two sites: BSD Micro RC and DW Foamies. The BSD listings did not include the "train" Rx's and the Foamies site never opened. Any idea what's happening?

Thanks. No hurry, I won't be purchasing for 4-6 weeks, but I was exploring RC options.

Tom

Back To Top

 Posted: Fri Oct 19th, 2012 03:07 pm
   
82nd Post
DavidT
Registered
 

Joined: Wed May 2nd, 2012
Location: United Kingdom
Posts: 456
Status: 
Offline
Hi Tom, I'll PM you direct.
Regards, David.

Last edited on Fri Oct 19th, 2012 03:36 pm by DavidT

Back To Top

 Posted: Sat Oct 20th, 2012 02:19 pm
   
83rd Post
quincy
Registered
 

Joined: Wed Oct 21st, 2009
Location:  
Posts: 23
Status: 
Offline
David,
I have been watching this topic since it started and am really impressed with what you are doing. I am fairly new to RC and have a question.

If I have two locomotives with your receivers installed and I want to switch from running one to the other using the same transmitter, what is the procedure needed to accomplish this with a 2.4gHz system?

John Adams

Last edited on Sat Oct 20th, 2012 02:20 pm by quincy

Back To Top

 Posted: Sat Oct 20th, 2012 04:25 pm
   
84th Post
Horny Dublo
Registered
 

Joined: Sat Oct 20th, 2012
Location: Wokingham, United Kingdom
Posts: 26
Status: 
Offline
Hi David - I too am very impressed with your products and just what I was looking for - almost. I would dearly like to keep the 12v motors in my OO locos and wondered whether the Add2 add-on board and a 2s lipo would allow the motor to give a good performance hauling a 10 coach train - Or even 3s lipo?

Thanks .. Andy



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

 Posted: Sat Oct 20th, 2012 04:35 pm
   
85th Post
DavidT
Registered
 

Joined: Wed May 2nd, 2012
Location: United Kingdom
Posts: 456
Status: 
Offline
Hi John,
Thanks. The cheapest 2.4 transmitters have one identity. You would bind the receivers in all your trains to this. Whichever is on would obey the signal. If both are on, both will move. So to change train you switch one on and the other off. Same as 27MHz.

On higher-end transmitters you get 'model memories' and what Spektrum call 'ModelMatch'. The DX6i has 10 memories. Each memory has a unique identity. Only one can be active. With a radio like this you either bind all your trains to one memory (like the cheaper radios) or each train to a different memory. If you use different memories for each train, you could have both trains switched on. You would then select which is active from the Tx by your choice of model memory.

Another option would be to take advantage of the many channels that hobby Tx's have. Transmitters with 2 joysticks can normally control at least 4 channels. 2 are 'forward/backward' orientated stick movements using Ch1 and Ch3. So you could put motor control of one train on Ch1 and the other on Ch3. You could use all 4 if you don't mind moving the sticks side to side for 2 of them. With this approach, up to 4 could be on and ready to move depending on which stick you stir.

There's always a lot to take in with any new topic. I probably answered your question in the first paragraph which would be where tradional FM systems end. But 2.4 is where all the non-train hobby develpment is so hopefully describing extra options helps more people appreciate them and mould how this stuff evolves. Early days I think. Feel free to ask more questions and help guys like me understand what you want.
David.

Back To Top

 Posted: Sat Oct 20th, 2012 04:54 pm
   
86th Post
mwiz64
Registered


Joined: Mon Mar 26th, 2012
Location: Fenton, Michigan USA
Posts: 1329
Status: 
Offline
The technology is out there to have a very nice 2.4 train transmitter if only someone would adapt one. What do I mean? Well for one my Airtronics SD-10G has model quick select. What's that? I can switch between the first 3 models of my 50 saved with the simple push of a button. Of course, for safety, you have to switch the TX on and off. The receivers however have fail safe built in. What does that mean? it means that they will go to a preset condition when the signal is lost. One preset is hold the last known position.

Even without a train specific programming set for that radio system, you could run one train and quick switch to another with the push of a button and the first one would continue at the speed you left it at or it could just stop in place. You could quickly juggle three locos like this without a single hardware modification to what is available now.

Airtronics makes some pretty small 4 channel receivers. They are too big for the small stuff but if you can fit a little bigger stuff then away you go. Or, if David made his stuff compatiable with Airtronics then maybe even the small stuff could take advantage of that. Dave, would it be difficult to put fail safe programming like I mentioned above into your receivers?
... Would it be difficult to make your stuff Airtronics compatiable?

Maybe you can get those features on some Spektrum transmitters. I don't know. I do know the higher end Spektrum transmitters are more costly than the SD-10G

Mike

Last edited on Sat Oct 20th, 2012 05:04 pm by mwiz64



____________________
Mike
Back To Top

 Posted: Sat Oct 20th, 2012 06:24 pm
   
87th Post
DavidT
Registered
 

Joined: Wed May 2nd, 2012
Location: United Kingdom
Posts: 456
Status: 
Offline
Mike,
My receivers will stop the motor on loss of signal. To keep them going while adjusting another we need them all the use the 'same' signal. We could associate each receiver with a position on a spare channel. This could be used to select each when needed. But if they are at different power levels then it might be tricky syncing things when changing trains. I suspect that separate channels for each train will be the easiest approach.
dt.

Back To Top

 Posted: Sat Oct 20th, 2012 06:42 pm
   
88th Post
DavidT
Registered
 

Joined: Wed May 2nd, 2012
Location: United Kingdom
Posts: 456
Status: 
Offline
Hi Andy,
You don't live far from me!

ADD2 was intended to boost current capability but can be used with 2S lipos. I've not been putting it forward as an option because it would be a bit fiddly to use.

ADD2 can handle 2S but the Rx only 1S. You could do this from the same 2S lipo if you have a balance connector on the lipo. The Rx must be powered with the 'bottom' cell and it would stop driving the motor when it reaches 3v.

The disadvantage of this approach is that it will make cells go out of balance. So it would only be wise to do it if you have a charger that can balance them again.

I can prepare a wiring diagram if you are interested in seeing how to hook it up.
Regards, David.

Back To Top

 Posted: Sat Oct 20th, 2012 09:13 pm
   
89th Post
Horny Dublo
Registered
 

Joined: Sat Oct 20th, 2012
Location: Wokingham, United Kingdom
Posts: 26
Status: 
Offline
Thanks David - Perhaps if I tell you what I am aiming for you can guide me ... I would like to RC modify Hornby pacific locos such as the Britannia and West Country class retaining the 12v motors, which would be capable of pulling up to 10 coaches. I think 1s lipo would struggle so at least 2s and possibly 3s may be required .. Am I asking for the moon? 

 I think there could be a huge market for such an RC system  ..

 

 

Cheers ..Andy



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

 Posted: Sun Oct 21st, 2012 09:11 am
   
90th Post
DavidT
Registered
 

Joined: Wed May 2nd, 2012
Location: United Kingdom
Posts: 456
Status: 
Offline
Andy,
I don't currently have a receiver with integrated ESC for 2S or 3S. Losi make 2S; does anyone else make 3S? I need to make one soon!

I think the "up to 10 coaches" requirement is more about Current rating than Voltage. Voltage mainly affects top end speed.

To meet the 3S requirement now I think you have to use separate Rx and ESC. The ESC would need to have a BEC. I and others can provide links to those we know of if you wish. If you are familiar with microprocessors you can convert a small 1-way brushless ESC to 2-way brushed.

For a DSM2 receiver you would use an AR6300, 4 or 6ch Orange or one of my servo receivers if size is a constraint. If you like the 'full stick' and separate 'direction channel' approach then I can provide that in a small receiver.
dt.

Back To Top


 Current time is 04:00 am
Page:  First Page Previous Page  ...  4  5  6  7  8  9  10  11  12  13  14  ...  Next Page Last Page  

Top



UltraBB 1.172 Copyright © 2007-2016 Data 1 Systems