HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Nov 18, 2010, 06:32 PM
Registered User
techspy's Avatar
USA, NC, Matthews
Joined Aug 2008
3,242 Posts
FYI for anyone interested, the R6014FS needs the high impedance approach. I just received the rssi buffer from DPCAV and it works great as long as you use input 1 that is labeled as

"This input is for Thomas Scherrer’s UHF based “LRS” R/C receiver or similar
models that have high RSSI impedances. It has a low pass filter for reducing
noise."

I tried on input 2 first but the reading jumped around erratically just as if there was no buffer installed.
techspy is offline Find More Posts by techspy
RCG Plus Member
Latest blog entry: My Esprit Saga
Reply With Quote
Sign up now
to remove ads between posts
Old Nov 22, 2010, 06:22 AM
Registered User
dragant's Avatar
Belgrade, Serbia
Joined May 2010
456 Posts
Quote:
Originally Posted by bakchos View Post
I question tho, when the Transmitter is off, i have 0.87 Volt, when on at 100 % i get 1.07 Volt, and when the transmitter is in the microwave i get 1.25 Volt.

So it looks like it get higher when strenght is weak, but gets lower when turned off, is that common ?

Here is the pictures,









Hope it helps.
It helps a lot. Thanks Does it works for you?
Where do you connect this on the Remzibi board?

One more question for you (please)
I have 6ch Flysky receiver for my FPV plane and would like to have rssi on my osd screen. This Rx have same A7105 chip and I see where you soldered one wire, but where should I solder second whire on my board?







dragant is online now Find More Posts by dragant
Reply With Quote
Old Nov 22, 2010, 07:07 AM
2Vision-Air
bakchos's Avatar
Canada, QC, Blainville
Joined Aug 2009
2,179 Posts
[QUOTE=dragant;16616860]It helps a lot. Thanks Does it works for you?
Where do you connect this on the Remzibi board?

One more question for you (please)
I have 6ch Flysky receiver for my FPV plane and would like to have rssi on my osd screen. This Rx have same A7105 chip and I see where you soldered one wire, but where should I solder second whire on my board?

[QUOTE]

It was connected to the ADC2 pad on Osd,

For the wires, one is connected to the RSSI pin of the chip, and the other is a ground.
bakchos is online now Find More Posts by bakchos
RCG Plus Member
Old Nov 22, 2010, 07:09 AM
Registered User
kristaps_r's Avatar
Latvia, Riga
Joined May 2010
661 Posts
Quote:
Originally Posted by dragant View Post
It helps a lot. Thanks Does it works for you?
Where do you connect this on the Remzibi board?

One more question for you (please)
I have 6ch Flysky receiver for my FPV plane and would like to have rssi on my osd screen. This Rx have same A7105 chip and I see where you soldered one wire, but where should I solder second whire on my board?

Second wire is ground.
kristaps_r is offline Find More Posts by kristaps_r
Reply With Quote
Old Nov 22, 2010, 08:44 AM
Registered User
dragant's Avatar
Belgrade, Serbia
Joined May 2010
456 Posts
Thanks, it's clear now.
Please tell me is it ok to connect it to osd this way and do I have to use some resistor between Rx and OSD board?



dragant is online now Find More Posts by dragant
Reply With Quote
Old Nov 22, 2010, 11:26 AM
Registered User
kristaps_r's Avatar
Latvia, Riga
Joined May 2010
661 Posts
Quote:
Originally Posted by dragant View Post
Thanks, it's clear now.
Please tell me is it ok to connect it to osd this way and do I have to use some resistor between Rx and OSD board?



I think you can do it but maybe need RSSI buffer http://www.dpcav.com/xcart/product.p...0&cat=0&page=1 or DIY http://www.fpv-community.com/forum/s...ad.php?tid=363 because RF chip may be not able to provide enough current.
kristaps_r is offline Find More Posts by kristaps_r
Reply With Quote
Old Dec 06, 2010, 12:13 PM
Azerbaijan FPV
nexstarselect's Avatar
Joined Nov 2009
379 Posts
He every one i use this module
http://www.bevrc.com/bev-24g-long-ra...s-rx-p-85.html


I must connect + in1 or in2 ?

Thank you
nexstarselect is offline Find More Posts by nexstarselect
Reply With Quote
Old Dec 14, 2010, 07:28 AM
Flying with the eagles
etman's Avatar
Eagle's nest
Joined Nov 2008
2,121 Posts
I need help.

I was testing the IC pins of my Hitec RCD9600 to look for the RSSI pin.
I found three pins which vary when the TX is switched on and off.

Pin 1 -> 0.69V to 1.3V
Pin 2 -> 0.18V
Pin 3 -> 0.3V
Pin 4 -> 0.19V
Pin 5 -> 0.19V
Pin 6 -> 0.4V
Pin 7 -> 0.16V to 0.85V
Pin 8 -> 0V
Pin 9 -> 0.68V to 1.3V
Pin 10 -> 0.24V
Pin 11 -> 0.18V
Pin 12 -> 0.24V
Pin 13 -> 0.31V
Pin 14 -> 0.4V
Pin 15 -> 0.24V
Pin 16 -> 3.59V

So I chose pin 7 as the RSSI (Dunno if that's correct)
Then I made the soldering connections.
RSSI is read by RMILEC $10 OSD.

When I connect the power to the RX, the ESC keeps beeping.
I found the culprit is the RSSI signal cable. When I disconnect the cable the ESC boots up fine.

I thought the RSSI needs an impedance, so I added 1000 ohm resistor in series. Seems like its not enough or I'm doing something wrong.

Marking on the chip is
IW4015BD
0427

OK I found the datasheet, but it doesn't say which pin is RSSI.
http://www.digchip.com/datasheets/pa...4015BD-pdf.php
etman is offline Find More Posts by etman
Last edited by etman; Jan 23, 2011 at 08:53 PM.
Reply With Quote
Old Dec 14, 2010, 10:45 AM
Registered User
Romania, Dolj, Craiova
Joined Sep 2007
14,945 Posts
4015 is the channels decoder (shift register), not the needed chip.
My guess is that what you want is on the vertical board, 3rd picture.
See other Hitec receivers in this thread, all are using same chip.
renatoa is offline Find More Posts by renatoa
Reply With Quote
Old Dec 14, 2010, 10:53 AM
Registered User
Romania, Dolj, Craiova
Joined Sep 2007
14,945 Posts
FrSky Futaba FASST compatible

This receiver is using the ML2724DH transceiver, featuring analog RSSI on pin 28.
The RSSI output is buffered, and voltage swing is between 75mv (no signal) - and clipped to 1.9V at 15dBm.
The pin is the not connected one from the picture.
renatoa is offline Find More Posts by renatoa
Last edited by renatoa; Dec 15, 2010 at 03:24 AM.
Reply With Quote
Old Dec 14, 2010, 06:49 PM
Flying with the eagles
etman's Avatar
Eagle's nest
Joined Nov 2008
2,121 Posts
Quote:
Originally Posted by RENATOA View Post
4015 is the channels decoder (shift register), not the needed chip.
My guess is that what you want is on the vertical board, 3rd picture.
See other Hitec receivers in this thread, all are using same chip.
Thank you Renatoa. I thought so too.
It must be the other chip. Its hard to get at.
etman is offline Find More Posts by etman
Reply With Quote
Old Dec 14, 2010, 09:12 PM
AMA #535918
USA, NV, Las Vegas
Joined Apr 2006
321 Posts
Quote:
Originally Posted by etman View Post
Thank you Renatoa. I thought so too.
It must be the other chip. Its hard to get at.
I have a very similar Hitec rx. And the chip is on the middle board. So much stuff is in the way, you can't even see the leg needed.
vegasbs is offline Find More Posts by vegasbs
Reply With Quote
Old Dec 15, 2010, 02:20 AM
Registered User
Croatia
Joined Dec 2010
137 Posts
RSSI pin on a futaba fasst R6108SB

Hi,
does anyone knows where is the RSSI pin on a futaba fasst R6108SB?
tnks!
wiper1974 is offline Find More Posts by wiper1974
Reply With Quote
Old Dec 15, 2010, 04:13 AM
Flying with the eagles
etman's Avatar
Eagle's nest
Joined Nov 2008
2,121 Posts
Quote:
Originally Posted by vegasbs View Post
I have a very similar Hitec rx. And the chip is on the middle board. So much stuff is in the way, you can't even see the leg needed.
Yes a real pain. My eyes gonna hurt.
etman is offline Find More Posts by etman
Reply With Quote
Old Dec 15, 2010, 07:36 AM
Flying with the eagles
etman's Avatar
Eagle's nest
Joined Nov 2008
2,121 Posts
Quote:
Originally Posted by etman View Post
I need help.

I was testing the IC pins of my Hitec RCD9600 to look for the RSSI pin.
I found three pins which vary when the TX is switched on and off.

Pin 1 -> 0.69V to 1.3V
Pin 2 -> 0.18V
Pin 3 -> 0.3V
Pin 4 -> 0.19V
Pin 5 -> 0.19V
Pin 6 -> 0.4V
Pin 7 -> 0.16V to 0.85V
Pin 8 -> 0V
Pin 9 -> 0.68V to 1.3V
Pin 10 -> 0.24V
Pin 11 -> 0.18V
Pin 12 -> 0.24V
Pin 13 -> 0.31V
Pin 14 -> 0.4V
Pin 15 -> 0.24V
Pin 16 -> 3.59V

So I chose pin 7 as the RSSI (Dunno if that's correct)
Then I made the soldering connections.
RSSI is read by RMILEC $10 OSD.

When I connect the power to the RX, the ESC keeps beeping.
I found the culprit is the RSSI signal cable. When I disconnect the cable the ESC boots up fine.

I thought the RSSI needs an impedance, so I added 1000 ohm resistor in series. Seems like its not enough or I'm doing something wrong.

Marking on the chip is
IW4015BD
0427

OK I found the datasheet, but it doesn't say which pin is RSSI.
http://www.digchip.com/datasheets/pa...4015BD-pdf.php
http://www.datasheetcatalog.org/data.../1035264_1.pdf
TA 7761
So the RSSI is the "signal level" pin 7?
etman is offline Find More Posts by etman
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
For Sale usb cable for futaba/hitec pin (round 6 pins) jaas75 Aircraft - General - Miscellaneous (FS/W) 0 Sep 05, 2008 12:34 AM
Pots for Futaba conquest transmitter hcastell Electric Plane Talk 2 Sep 12, 2001 08:14 AM
Make your own DIN plug for Futaba TX! pullin-gs Electric Plane Talk 0 Sep 06, 2001 08:05 PM
WTB: Hitec 555 rx for Futaba ( Slope Nut Aircraft - Electric - Airplanes (FS/W) 2 Jul 28, 2001 08:54 PM
Programming manual for Futaba 7UAF gwh Electric Plane Talk 3 May 31, 2001 12:43 AM