RangePiloting.com --- RangeLink UHF LRS - Page 4 - RC Groups
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This thread is privately moderated by sid.huang, who may elect to delete unwanted replies.
Jan 06, 2012, 07:29 PM
Registered User
Avenger GBU-1H's Avatar

5V feed and inverted PPM?


Sid,

I have been following your thread and I am VERY interested in your Rangelink product. I hope to be using my JR 9303 2.4 Ghz 9-channell TX to feed the PPM to the Rangelink unit. It is my understanding that many different models of JR/Spektrum transmitters can be modified to produce a 5v inverted signal through the trainer port.

Question: Will the Rangelink accept an inverted 5V PPM signal? I have been following the JR9303 Mod on another group here:
http://fpvlab.com/forums/showthread....-PPM-mod/page3

Please let me know if this will work.

Thanks,
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Jan 06, 2012, 07:57 PM
Chinglish-funny
yes,check first post:
7: Compatibility: RangeLink can work with any popular 4-12 Channel radio in the market, and it does not matter if the PPM signal is positive or negative! (Plans to make rangelink works with Futaba radio 12ch ppm mode)


Sid
Jan 07, 2012, 06:52 AM
Registered User
Avenger GBU-1H's Avatar
Sid,

I am getting together my order, but was curious about the USB2TTL (CP2102). Is this used for programming? Please advise.

Thanks,
Jan 07, 2012, 08:12 AM
Chinglish-funny
yes, it can be used for rangelink fw upgrade, if u have ,so it no need more.


Sid
Jan 12, 2012, 09:30 PM
Registered User
hairbag's Avatar
are there firmware updates available? where will we get them when they are?
Jan 13, 2012, 09:00 AM
Chinglish-funny
After chinese new year.. start modify the fw.

BTW your 7C cannt works at 12ch ppm mode.

http://www.futaba-rc.com/systems/feature-compare.html
8FG,12FG,12Z,14MZ Serial type radio support 12ch ppm mode.

Just i think the T8FG would be great, low price. ^_^
Last edited by sid.huang; Jan 14, 2012 at 07:00 AM.
Feb 01, 2012, 02:31 AM
What goes up, must come down
crazy1pilot's Avatar
when will you be receiving more stock of the RangLink Set?
also is this system pretty consistent at 16km LOS? i don't believe i am in too bad of an RF environment.

Crazy1
Feb 01, 2012, 08:58 AM
Chinglish-funny
will back in stock soon, mate.

about the range ,i dont know how to answer, because it really depend to your rf environment...
Feb 10, 2012, 07:10 AM
Registered User
mmormota's Avatar
A slow serial uplink (surface to aeroplane) would be very useful for autopilot controlled UAV flight. For example in-flight waypoint modifications etc.
Do you have a plan making such a firmware version? Can't be too complicated, the Tx already has the serial input, and even a very slow baudrate is acceptable. This is something the competition misses - so it should make your system first choice for the UAV fan.
Feb 10, 2012, 08:27 AM
Chinglish-funny
Quote:
Originally Posted by mmormota
A slow serial uplink (surface to aeroplane) would be very useful for autopilot controlled UAV flight. For example in-flight waypoint modifications etc.
Do you have a plan making such a firmware version? Can't be too complicated, the Tx already has the serial input, and even a very slow baudrate is acceptable. This is something the competition misses - so it should make your system first choice for the UAV fan.
Hi, Thanks for your attention, I know what you means, I can make a fw for this special application. but not now. so many work need to do...

BTW, UAV need a license. fans???


Sid
Feb 12, 2012, 11:18 AM
Registered User
hairbag's Avatar
just got a new futaba 8 FG and the plug and play cables i got do not work with this transmitter either.

will you be sending out working replacements Sid?
Feb 12, 2012, 06:59 PM
Chinglish-funny
Quote:
Originally Posted by hairbag
just got a new futaba 8 FG and the plug and play cables i got do not work with this transmitter either.

will you be sending out working replacements Sid?
Confirmed,that pnp cable for futaba (i sell to you),is right.

for T8FG,
https://www.rcgroups.com/forums/show...&postcount=361
On the trainer port , weak signal out, so you need open the tx,and remove the two diodes

make sure the t8fg works at 8 ch ppm mode.

Sid
Feb 12, 2012, 07:08 PM
Registered User
hairbag's Avatar
do you have a link with pictures of the two diodes that have to be removed?
Feb 12, 2012, 07:09 PM
Chinglish-funny
open the link, download the weak.pdf.
Feb 13, 2012, 07:00 AM
Registered User
hairbag's Avatar
thanks Sid... i will pull these out today and hopefully all will be good.

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