RSSI pins for various receivers - Page 6 - RC Groups
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Jan 09, 2010, 05:08 PM
RC Wannabe!
areis81's Avatar
hi... no help for hitec hfs-06mt of post #68,69? thanks....
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Jan 09, 2010, 05:38 PM
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haha, just ask Renatoa one more time.

he's active in a lottt of treads
Jan 10, 2010, 03:52 AM
Registered User
Quote:
Originally Posted by areis81
hi... no help for hitec hfs-06mt of post #68,69? thanks....
Thank you Remy, will slowdown soon, I must build and fly more than watching forums.

@areis81, sorry, but from your post #70 I thought you are clear now.
31136 is one of the two well known universal chips, rssi is on pin 12.
Read #18 also, please.

@Ceccoz, can you check the levels on red circle pad? Even if circuits are different, there are chances that pin to be RSSI. I would like also have a picture of the other side of the receiver.
Last edited by renatoa; Jan 10, 2010 at 04:00 AM.
Jan 10, 2010, 06:04 AM
Registered User
Here ya go.
Jan 10, 2010, 08:12 AM
RC Wannabe!
areis81's Avatar
ah! from the numbers i thought they were different chips! i'm really sorry i didn't understand, my english must be improved! thanks a lot for your help and patience guys, you helped me a lot! thanks to all!!!
Jan 10, 2010, 08:15 AM
RC Wannabe!
areis81's Avatar
Quote:
Originally Posted by RENATOA
For anyone asking for RSSI for unknown receivers:
- open it
- try to locate chips like 7761 or 31136, 99% of the FM receivers (35/40/72MHz) use such chip
- some pictures of the two chips below:
https://www.rcgroups.com/forums/atta...mentid=2535617
https://www.rcgroups.com/forums/atta...hmentid=770766
- RSSI is on pin 7 of 7761, or pin 12 of 31136

If the above fails, first search rcg archive using "rssi <your receiver>"
If fails again, try Google
Finally, ask here, but always post pictures !

darn, i read this post a dozen times thinking 'gosh my chip is different i must ask for help!' but i was only reading 7761 and not the second number.... i'm really sorry, i'll try to use more attention from now on... thanks again!
Jan 10, 2010, 08:50 AM
Registered User
haha Renatoa saved the day. Did it also many times for me.
Jan 10, 2010, 09:36 AM
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h_bondok's Avatar
Hi guys,

any one know where is the RSSI for R3110DPS futaba receiver.... thanks
Jan 10, 2010, 12:18 PM
Registered User
Quote:
Originally Posted by h_bondok
Hi guys,

any one know where is the RSSI for R3110DPS futaba receiver.... thanks
Could be very close to R5114dps, but... as the picture says...
Jan 17, 2010, 05:52 PM
Registered User
Ceccoz's Avatar
Quote:
Originally Posted by RENATOA
Thank you Remy, will slowdown soon, I must build and fly more than watching forums.

@areis81, sorry, but from your post #70 I thought you are clear now.
31136 is one of the two well known universal chips, rssi is on pin 12.
Read #18 also, please.

@Ceccoz, can you check the levels on red circle pad? Even if circuits are different, there are chances that pin to be RSSI. I would like also have a picture of the other side of the receiver.
Hi Renatoa,
I have tested the levels on red circle pad. I think that is RSSI pin.
Levels are:
0.8 V Transmitter off
2.13 V Transmitter on
In attacchment you can find also a picture of the back side of receiver.
What do you think??
Thanks

Francesco
Jan 18, 2010, 01:32 AM
Registered User
What can I say... congrats !
Another one ... receiver solved, what do you think
Jan 18, 2010, 12:57 PM
Registered User
Ceccoz's Avatar
Quote:
Originally Posted by RENATOA
What can I say... congrats !
Another one ... receiver solved, what do you think
I think that I have only to thank you .
Do you know if there is a way to mod dsc port to pull out RSSI voltage?
Thanks

Francesco
Jan 18, 2010, 01:54 PM
Registered User
Only if you want to sacrifice DSC feature, because there is no pin not allocated.
Jan 18, 2010, 03:51 PM
Registered User
Ceccoz's Avatar
Quote:
Originally Posted by RENATOA
Only if you want to sacrifice DSC feature, because there is no pin not allocated.
yes, of course, how can I do it?
Jan 18, 2010, 04:50 PM
Registered User
Cut the pin(s) of dsc plug and solder your RSSI and instead, how else ?
I would cut the ppm pin only (where comes white wire), and keep black and red (ground and power). Black/Ground is required anyway, to connect to the OSD ground.
Be sure how you insulate the red/power coming from receiver, to not touch something at OSD side.


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