iRangeX iRX-IR8M 2.4G 8CH Multi-Protocol

Use 22uF/16V or 22uF/25V capacitor for upper cap.
And use 220uF (or less 100uF should be okay) 25V capacitor for lower cap.
Note that lower smt electrode is MINUS-Polarity.

Moeder wrote: Those bridges are intended, as those are all power supply Pins.

Thanks, you are right.

Slightly off topic....

CYRF6936 is discontinued.....
www.cypress.com/part/cyrf6936-40ltxc

And Cypress do not have latest 802.15.4 products, only WiFi.

Hello dear friends!

With Frsky receivers there are unfortunately very strong range issues. Me and a friend of mine get a failsave after like 50-100 meters with Frsky!

"FrSky R-XSR Ultra SBUS / CPPM D16 16CH Mini Redundancy Receiver 1.5g for RC Multirotor FPV Racing Drone"

www.banggood.com/FrSky-R-XSR-Ultra-SBUS-...57.html?rmmds=search

Does anyone else have the problem?

On "afdhs 2a" there were no range issues so far with an x6b reciever Unfortunately the receiver is too big for some builds.

This is the one: "Flysky X6B 2.4G 6CH i-BUS PPM PWM Receiver for AFHDS i10 i6s i6 i6x i4x Transmitter"

www.banggood.com/Flysky-X6B-2_4G-6CH-i-B...earch&cur_warehouse= USA

Are there any alternative for small recievers with rssi telemetry?

Is it maybe a BUG is the software of "Deviation"? (FrSky)

There is also a problem with the included reciever, it only works in ppm, not sbus or ibus mode. This adds the issue that you cant set up a failsave properly and the quad stays armed, motors spinning so using that is just dangerous.

www.banggood.com/818CH-Mini-Receiver-Wit...__4&cur_warehouse=CN

The potentiometer of Jimbol was fixed with epoxy resin.
Then the center problem was solved.

H, G switch Modify photos attached.

ir8m has no trainer port. Can I add a trainer port?

I am also not able to bind an Frsky D8 receiver to this radio. I was able to bind a Frsky XM+, but no luck with several different Frsky D8s. I have not checked the range of the XM+ to see if I have range issues like others on this thread.

Has anyone successfully bound a D8?

For my IR8M, all FrSkyX D16 receiver needed a Freqfine set to 63... So I guess it will be requiered also for the D8 protocol

I have not tried tuning the frequency. I will give it try tonight. Thank you.

SeByDocKy wrote: For my IR8M, all FrSkyX D16 receiver needed a Freqfine set to 63... So I guess it will be requiered also for the D8 protocol

For the fine tuning option, I assume the 63 is shifting the frequency positive by 63 steps? Also, how did you determine 63 was the right number?
Thanks.

Yes +63

Adjusting the fine frequency by 63 worked for binding the Frsky D8 receiver. Thank you.
Range check with 100uw worked at 30 feet.

SeByDocKy wrote: Yes +63

First, thank you for this information.

How did you determine +63 was the correct offset? I am interested in the details because I am an electrical engineer and want to understand the approach in case I run across a similar issue with other receivers.

Thank you again.

plmask wrote:

SeByDocKy wrote: Yes +63

First, thank you for this information.

How did you determine +63 was the correct offset? I am interested in the details because I am an electrical engineer and want to understand the approach in case I run across a similar issue with other receivers.

Thank you again.

The classic méthod ..... First bind with a correct value .... watch the receiver led.... The led will start to blink slower when the RSSI will decrease..... Note the Lower bound, (+4 for me), the Upper bound (127).... and take the middle interval value

plmask wrote: Adjusting the fine frequency by 63 worked for binding the Frsky D8 receiver. Thank you.
Range check with 100uw worked at 30 feet.

30 feet?????

that is very very little. There you will have no problems.

3000 feet must go!

with Frsky and this station is only 200 to 400 feet!
That is far too little

SeByDocKy wrote:

plmask wrote:

SeByDocKy wrote: Yes +63

First, thank you for this information.

How did you determine +63 was the correct offset? I am interested in the details because I am an electrical engineer and want to understand the approach in case I run across a similar issue with other receivers.

Thank you again.

The classic méthod ..... First bind with a correct value .... watch the receiver led.... The led will start to blink slower when the RSSI will decrease..... Note the Lower bound, (+4 for me), the Upper bound (127).... and take the middle interval value

Thank you again for the reply.

You have great patience to determine the range!