Search found 46 matches

by gastolectric
Sun Oct 18, 2020 8:30 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: RPM resolution?
Replies: 232
Views: 145205

Re: RPM resolution?

Following a weekend of field testing I can report back that a combination of factors were involved: I swapped out the 5K6 resistor in the rc filter for a 4K7 which extended the rev range (100nf cap) I used mstens suggested formula adjustment above to curtail the data output starting with cutting bac...
by gastolectric
Wed Oct 14, 2020 8:32 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: RPM resolution?
Replies: 232
Views: 145205

Re: RPM resolution?

Carbo wrote: Wed Oct 14, 2020 8:10 am A 100pF ceramic cap connected to (D)8 and GND solved a similar issue for me. Interference was presumably caused by RX telemetry. OpenTX filtering should not be neccessary imo.
Awesome thanks Carbo
by gastolectric
Tue Oct 13, 2020 6:59 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: RPM resolution?
Replies: 232
Views: 145205

Re: RPM resolution?

That sounds strange. And when the plane is back on the ground, everything is fine again? On the ground, did you move all servos? br KH Admittedly on the last flight I turned off the filter function on the rpm telemetry output on my Horus so that would explain it being jumbled throughout the rev ran...
by gastolectric
Tue Oct 13, 2020 9:46 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: RPM resolution?
Replies: 232
Views: 145205

Re: RPM resolution?

You can try to filter the value on oXS side. Thanks Michael, I'll give this a go and let you know how I get on, though I'm also reminded wading back through this thread that because I'm only losing resolution above 90% throttle it may just be the rc filter that needs tweaking because I'm reaching t...
by gastolectric
Mon Oct 12, 2020 9:06 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: RPM resolution?
Replies: 232
Views: 145205

Re: RPM resolution?

Hi guys, I've been moving house, career change etc the past few months - dusted off my gasser this weekend to find that my RPM sensor isn't playing ball... When I run the engine on the ground I get perfect, sensible read outs on my Horus all the way through the rpm range but the moment she is airbor...
by gastolectric
Tue Apr 28, 2020 9:53 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New to openXsensor - GPS and smartport question
Replies: 74
Views: 49879

Re: GPS & Vario success!

I got my openXsensor working this morning. One of my arduino nano boards is serviceable and I was able to upload to it after many attempts. It is now satisfying to see my coordinates displayed on the telemetry screen in my Taranis X9DPlus. Thanks Greg. However, now my vario will not work properly. ...
by gastolectric
Tue Apr 28, 2020 7:51 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New to openXsensor - GPS and smartport question
Replies: 74
Views: 49879

Re: New to openXsensor - GPS and smartport question

...................................... The GPS connects Tx(gps) to Rx0 pin on Nano and GND(gps) on adjacent pin GND pin to Rx0, D6 connects via 10K resistor to Rx(gps) shows 3.7V after resistor. 5V on gps connects to 5V pin on nano .................................... Greg, My interpretation of you...
by gastolectric
Wed Apr 22, 2020 10:54 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New to openXsensor - GPS and smartport question
Replies: 74
Views: 49879

Re: New to openXsensor - GPS and smartport question

Thanks Michael. Still leaves me with a mystery though...........about this "raw" pin! Hi Jim, My understanding of these things is 'raw' means you can power the board with anything from 5-12V on the "Vin" pin - so in the case where you're powering Vin from a higher than 5V voltag...
by gastolectric
Wed Apr 08, 2020 10:16 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: RPM resolution?
Replies: 232
Views: 145205

Re: A vario now working!

Greg, I have managed to get a file compiled, uploaded and the openXsensor vario working! Using BMP180 baro. My only remaining dilemma is trying to figure out what I was doing wrong before!.................... Question: How do I save this compiled file reliably for later use? I might get a couple mo...
by gastolectric
Sun Mar 08, 2020 9:01 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: RPM resolution?
Replies: 232
Views: 145205

Re: RPM resolution?

That's good Greg. Just to clarify; by how much does the reading increase when the aircraft is in the air after this mod? That is, when the engine is unloaded to some degree? Hi Jim, I haven't yet had the opportunity to test it in the air - just backyard trial to make sure the combo of resistor and ...
by gastolectric
Sat Mar 07, 2020 7:06 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: RPM resolution?
Replies: 232
Views: 145205

Re: RPM resolution?

First, a RC filter does not cut off 100% of the frequencies higher than a value. It is a progressive filter. More important: the formula applies on a sinusoîdal signal but the signal coming from the Hall sensor is not sinusoïdal. It is a digital signal and probably look more as a pluse. So it conta...
by gastolectric
Sat Mar 07, 2020 8:38 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: RPM resolution?
Replies: 232
Views: 145205

Re: RPM resolution?

Some feedback on the subject I raised: I added a simple low pass filter to the signal line coming directly from the Hal pickup which splits via a y-lead before feeding the CDI. Without the filter the rpm values were erratic and over-reading in flight. Knowing nothing about the subject I ended up wit...
by gastolectric
Fri Mar 06, 2020 4:41 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: RPM resolution?
Replies: 232
Views: 145205

Re: RPM resolution?

For RPM, oXs counts the number of pulses in an enlapsed time. If the signal coming on pin D8 is noisy, the arduino can recognise some "noise" as a pulse and so report a to high RPM value. In order to avoid (reduce) this, you can try adding a RC filter between the CDI and the pin D8. Resis...
by gastolectric
Wed Mar 04, 2020 8:38 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: RPM resolution?
Replies: 232
Views: 145205

Re: RPM resolution?

In the air the airplane is moving, I believe it is normal for the RPM to increase. Example. Try making a dive. The RPM will increase. João Hi João, Absolutely but when the telemetry is reporting 9500 rpm for a 30cc gas engine and you're in straight and level flight and not even at full throttle - s...
by gastolectric
Wed Mar 04, 2020 7:47 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: RPM resolution?
Replies: 232
Views: 145205

Re: RPM resolution?

For RPM, oXs counts the number of pulses in an enlapsed time. If the signal coming on pin D8 is noisy, the arduino can recognise some "noise" as a pulse and so report a to high RPM value. In order to avoid (reduce) this, you can try adding a RC filter between the CDI and the pin D8. Resis...
by gastolectric
Wed Mar 04, 2020 3:08 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: RPM resolution?
Replies: 232
Views: 145205

Inconsistent RPM values

Guys, I'm wondering if anyone has experienced this phenomenon and has a solution.. (I posted this on RCGroups and Jim pointed me to this recent discussion thread) I've wired up an Arduino nano with GPS and RPM sensors in my 30cc gasser. The RPM pickup is via y-lead coming directly from the Hal picku...
by gastolectric
Sat Feb 08, 2020 6:51 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New to openXsensor - GPS and smartport question
Replies: 74
Views: 49879

Re: New to openXsensor - GPS and smartport question

Mstrens, you're a star thanks ever so much for the help. Woke up early mounted the GPS onto an east facing window booted up the GPS via u-centre and made sure I had a good fix then did a rapid cross over to connect it with nano board, powered up and voila. Instant fix and flashing Tx light and Horus...
by gastolectric
Sat Feb 08, 2020 2:22 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New to openXsensor - GPS and smartport question
Replies: 74
Views: 49879

Re: New to openXsensor - GPS and smartport question

I'll give it a go...

Is it necessary to drop the voltage from D6 to the Rx pin on the GPS to 3.3v? I'm sure I read somewhere that it can handle 5v but can't find where I saw that mentioned.

And I presume once data starts to flow that the D2/4 pin should start showing more than 0.3v?
by gastolectric
Sat Feb 08, 2020 1:46 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New to openXsensor - GPS and smartport question
Replies: 74
Views: 49879

Re: New to openXsensor - GPS and smartport question

Admittedly I'm testing it indoors and comparing with the FrSky GPS which gets discovered irrespective of whether it has a fix or not.

I'll have to wait for the rain in Sydney to stop before I can take the test bench outside. 😂😉
by gastolectric
Sat Feb 08, 2020 9:30 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New to openXsensor - GPS and smartport question
Replies: 74
Views: 49879

Re: New to openXsensor - GPS and smartport question

Hi guys, I'm hoping someone can help me narrow the search for the issue I'm having, being my first attempt at this.. I now have a BN-220 GPS and Arduino Nano. Connected the GPS to U-Center and it appears to work perfectly I have flashed the oXs to the nano having first checked that a simple flashing...
by gastolectric
Wed Jan 22, 2020 9:38 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New to openXsensor - GPS and smartport question
Replies: 74
Views: 49879

Re: New to openXsensor - GPS and smartport question

I don't know how to open that file in Arduino IDE, can you describe please? Jim. Hi Jim, Might be a case of the blind leading the blind here - from openXsensor GitHub site I clicked on Download .zip file and then unzipped this which gives a number of folders and all the files on the openXsensor pag...
by gastolectric
Wed Jan 22, 2020 4:36 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New to openXsensor - GPS and smartport question
Replies: 74
Views: 49879

Re: New to openXsensor - GPS and smartport question

Kilrah wrote: Wed Jan 22, 2020 4:14 am Which tab is selected doesn't matter.
Brilliant thanks
by gastolectric
Tue Jan 21, 2020 11:12 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New to openXsensor - GPS and smartport question
Replies: 74
Views: 49879

Re: New to openXsensor - GPS and smartport question

All of your questions are answered in 'oXs_config_description.h'. This is a text file for documentation. KH, One more silly question if I may, there are quite a number of files in the oSx folder and generally I would only open and edit the file oXs_config_basic.h and/or oXs_config_advanced.h; and p...
by gastolectric
Tue Jan 21, 2020 10:14 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New to openXsensor - GPS and smartport question
Replies: 74
Views: 49879

Re: New to openXsensor - GPS and smartport question

You are a star thanks ever so much KH

And pin 6 would be the pin allocated to gps in the IDE sketch.
by gastolectric
Tue Jan 21, 2020 9:34 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New to openXsensor - GPS and smartport question
Replies: 74
Views: 49879

Re: New to openXsensor - GPS and smartport question

Hi Greg. Mstrens seems to be off at the moment, so I'll try to give an answer. All of your questions are answered in 'oXs_config_description.h'. This is a text file for documentation. You find it in the oXs package, you can download from here. https://github.com/openXsensor/openXsensor OK, I unders...
by gastolectric
Tue Jan 21, 2020 8:35 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: New to openXsensor - GPS and smartport question
Replies: 74
Views: 49879

Re: New to openXsensor - GPS and smartport question

This is the type of gps I am currently using (BN-220). It wotks fine. It is a ublox neo8M inside. The conector/wires toconnect itto arduino are delivered too. https://fr.aliexpress.com/item/small-size-UBLOX-M8030-chipset-GPS-Receiver-with-Module-and-Antenna-BN-220/32797180193.html?spm=a2g0s.9042311...
by gastolectric
Sat Jan 18, 2020 9:23 pm
Forum: FRSky Horus radio
Topic: ACCST D16 2.X.X
Replies: 16
Views: 13873

Re: ACCST D16 2.X.X

Asked and answered on RCGroups post #17039 https://www.rcgroups.com/forums/showthread.php?2727927-FrSky-Horus-X12S-A-new-beginning/page1136#post43627977 "You put the 2.0.1. file in the FIRMWARE folder of your SD card. Then from the OpenTX interface SYS navigate to the SD FIRMWARE folder. Select...
by gastolectric
Sat Jan 18, 2020 8:59 pm
Forum: FRSky Horus radio
Topic: ACCST D16 2.X.X
Replies: 16
Views: 13873

Re: ACCST D16 2.X.X

Can anyone point me to a 'how to' instructions of using the stand alone 2.0.1 iXJT RF module download file (ie not the FrOS firmware file which is 6.9Mb but the 150Kb file) to flash this through OpenTx. I'm presuming this 'stand alone' means we can upgrade the internal RF module firmware through Ope...
by gastolectric
Wed Jan 08, 2020 1:52 am
Forum: Software
Topic: Companion 2.3.4 Log viewer query
Replies: 3
Views: 3639

Re: Companion 2.3.4 Log viewer query

Yep spot on thanks Kilrah, For the sake of any others that stumble with this, here are 2 screen shots: first one of the default format and then what my system was changing it to. For Time use the format hh:mm:ss.000 ; for date use 2012-03-15 https://static.wixstatic.com/media/004208_7dc14302c9b54a39...
by gastolectric
Wed Jan 08, 2020 1:24 am
Forum: Software
Topic: Companion 2.3.4 Log viewer query
Replies: 3
Views: 3639

Re: Companion 2.3.4 Log viewer query

Brilliant thanks, I'll look into that

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