Originally Posted by BlueAngel2000

ah, now i know why i missed this great thread, because it was not in the FPV forum.

I have the Flytron HT too and a Futaba FF10.
This would be great to have a wireless HT.

I want to use the license free band with 433MHz.
Since the receiver from Sparkfun is not available anymore i think i will use the ones from UK:
http://uk.rs-online.com/web/search/s...uct&R=617-2044
http://uk.rs-online.com/web/search/s...uct&R=617-2072

I can use them without any external components to transmit the PPM stream, am i right?

thanks

PS.: or are there other cheap good working modules available in the meantime.

These look to me like they will work fine. You will need one more component to buffer your signal tho (most likely) and that can be found earlier in the thread where i first encountered my problem and then solved it using the HEFXXXXX IC to buffer the signal. Read up a bit and you will find a text description of which IC to pick up and which pins to use on it.

Thanks for the fast answer.

No problem for me building that buffer.
I am building these as RSSI buffer already:
http://www.rcgroups.com/forums/showp...2&postcount=26

Originally Posted by BlueAngel2000

Thanks for the fast answer.

No problem for me building that buffer.
I am building these as RSSI buffer already:
http://www.rcgroups.com/forums/showp...2&postcount=26

Yup exactly the same principle! good luck and post us your success story

For sure, i will report back.

The receiver with 2400bps is not good enough?
because this one is in stock in Germany:
http://www.watterott.com/de/RF-Link-...faenger-434MHz


on ebay there some similar RF Links:
http://cgi.ebay.at/433MHz-Superheter...item4156e16284
but i don't know if they will work.

finally, the rf modules from ebay arrived after 1 month and i built the wireless link.
Works perfect without problems from the beginning.

thank you very much.


pictures attached.
Wireless link modules + Flytron Head tracker - naked
sealed with plasti dip (liquid plastic as water protection) + heat shrink - ready to use

nice work! Glad it worked out for you.... if only i could still use mine Im outta channels on my 9C with an AP + OSD system and the 14MZ is too much of a battery hog to use for LR FPV

thx.

You have to build a channel extender.

Its here on a German website:
http://www.modellfluginfo.de/Modellf...-erweitern.php

maybe use translator, but i think its not that hard to build and especially with ardunio to program.

this will be my next build.

Originally Posted by BlueAngel2000

thx.

You have to build a channel extender.

Its here on a German website:
http://www.modellfluginfo.de/Modellf...-erweitern.php

maybe use translator, but i think its not that hard to build and especially with ardunio to program.

this will be my next build.

Cool tip! Hope you make a build log of this one and a parts list to help us English speakers!

Maybe.
hehe
For sure, will do that.

But it will take some time until i can built it.

Parts list is short:
1x Arduino Pro Mini 328 5V 16MHz
cables and connectors

Guys, I am very interested in this wireless system (I us the HK) head tracker the only issue I have is that my system does have some drift depending on how steady the HT is when it initialises. I put a reset button on the back of the transmitter which makes resetting easier. My question is can this be somehow be done wireless too?

Originally Posted by BlueAngel2000

For sure, i will report back.

The receiver with 2400bps is not good enough?
because this one is in stock in Germany:
http://www.watterott.com/de/RF-Link-...faenger-434MHz


on ebay there some similar RF Links:
http://cgi.ebay.at/433MHz-Superheter...item4156e16284
but i don't know if they will work.

The Watterott is not working properly. I tested two pairs and both had terrible drop-outs.
The ones from RS are working fine. RS is also available in germany. Sending the parts over took 1 day: my recommendation

Does anyone know if a LRS (such as the Dragon, Range, etc -Link) would interfere with communication in these wireless Tx Rx? Those work on 433MHz freq. (hopping entirely within the 433Mhz ISM band 433.05-434.79)

The specs on the Operating Frequency (±250KHz) for the Sparkfun RF link Tx are 433.67 min / 433.92 center / 434.17 max MHz
and Rx 433.420 / 433.920 / 434.420 MHz
I see these are also available in 315MHz, probably a better choice for use with LRS. What do you guys think?

I'm going to try this very nice setup with Dennis Frie DIY head tracker which I finally got working. Has anyone tried it yet?


12/14/2012
Success! Thanks AnnihilaT for posting this mod. Works great and it's cheap to build ! I've incorporated it to the other awesome DIY, the Dennis Frie Zero Drift Arduino HeadTracker.

"AnnihilaT" Short-range PPM Tx/Rx for the "Dennis Frie" DIY HeadTracker (1 min 33 sec)

I am considering this mod with the DIY headtracker but after reading the info/comments on the product pages, it sure seems these do not transfer clean data at all. So you guys are using these without modification and not getting any twitching etc? I will have quite a bit of freqs going on (1.3GHZ, 2.4GHZ and 433MHZ) and don't want to try this if they are going to be too susceptible to RF interference.

Oh, and I see an antenna pin on both but saw where connecting one caused problems. Is anyone using antennas on both? If so, what is the max range?

By the way, seems the previous links go to discontinued items, here are the updated ones. I assume they are the same and will work the same?

https://www.sparkfun.com/products/10533

https://www.sparkfun.com/products/10535

Otherwise, would a set of XBees or similar work?

Like this, http://store.diydrones.com/3DR_Radio...try-3dr915.htm

Oh, and I see some report they do not need a buffer. What determines if one is needed or not? If one is needed will an RSSI buffer work ? (I have a spare)

Thanks

They're a bit on the finicky side.... and you gotta find how to get the best orientation. They do get some interference, but since there are so many different Tx, Rx, goggles, wiring, etc combinations it would be hard to predict how it's going to behave on each application. Parts are fairly inexpensive and if you like tinkering with stuff like this, it's fun putting together. Those XBees look expensive @$75 and a bit more complex. I'd imagine someone who has some good knowledge of those could get them to work

What is the 4010 buffer for, it's not a buffer, is it like a schmitt trigger to get sharp pulses ?