Search found 230 matches

by thomas9x
Wed Jul 02, 2014 2:13 pm
Forum: The Pickled Gnu (The Pub)
Topic: Open source speed sensor?
Replies: 77
Views: 25124

Re: Open source speed sensor?

I do not know if the Vector ADC (and I2C) is 3.3 or 5 volt but I expect it is 3.3 volt so there could perhaps be some issue with I2C interface. It is a 3.3V i2c interface. The eLogger V3 airspeed sensor operating in third party mode will be the least amount of effort. The firmware impact is minimal...
by thomas9x
Tue Jul 01, 2014 9:10 pm
Forum: The Pickled Gnu (The Pub)
Topic: Open source speed sensor?
Replies: 77
Views: 25124

Re: Open source speed sensor?

ADC: I think I have identified the ADC used in the Vector's airspeed sensor. The guys at EagleTree like to use Microchip's parts so my search started at microchip.com. I found they had a 12-bit ADC with i2c that was in a SOT-23-5 package. And to my glee, the data sheet confirmed that its part marki...
by thomas9x
Tue Jul 01, 2014 8:09 pm
Forum: The Pickled Gnu (The Pub)
Topic: Open source speed sensor?
Replies: 77
Views: 25124

Re: Open source speed sensor?

The advantage of re-purposing a ready-to-use sensor like EagleTree's Airspeed V3 module is that it it will have the necessary low noise construction to ensure accurate/stable results. Plus integration would be as easy as soldering four wires and some very simple firmware. Keep in mind that EagleTree...
by thomas9x
Wed Jun 18, 2014 1:05 am
Forum: The Pickled Gnu (The Pub)
Topic: Open source speed sensor?
Replies: 77
Views: 25124

Re: Open source speed sensor?

Best would probably be 4525DO-DS5AI001DP. FWIW the price for the sensor is about $25 USD. But it has both digital and analog interfaces, so a bit of something for everyone. :) Another way to skin this cat: The $42 USD retail ($33 at HobbyKing) EagleTree Airspeed sensor is ready to use and includes ...
by thomas9x
Mon Dec 23, 2013 6:42 pm
Forum: Hardware
Topic: ghost image with blue LED backlight?
Replies: 3
Views: 1237

Re: ghost image with blue LED backlight?

I'm surprised that no one else has noticed, commented, or complained about this issue... Like you, I have both white and blue back-lit 9x's. I compared them and confirm that there's ghosting on the blue (but none on the white). With my contrast setting (26) I'd estimate the fade period to be less t...
by thomas9x
Sun Dec 15, 2013 5:38 am
Forum: The Pickled Gnu (The Pub)
Topic: Xmas tree harvesting. Best ever.
Replies: 9
Views: 2743

Re: Xmas tree harvesting. Best ever.

There might be some fast forward trickery, but the behavior of the tow wire suggest that the helicopter is moving fast. And there are other videos that show that these tree harvesting pilots don't fool around. For example, this one seems more relaxing from the pilot's seat, but still amazingly fast ...
by thomas9x
Wed Nov 27, 2013 5:35 pm
Forum: er9x
Topic: Up-Link for ER9X [Magi(C)] a vision...
Replies: 58
Views: 16037

Re: Up-Link for ER9X [Magi(C)] a vision...

Not sure how you get 16 on/off devices from 4 bits, that is only 4 on/off bits. Oops, pardon my goof. Under my scenario the 4-bit data (+ start/stop overhead bits) would allow 8 on/off states. This kind of implementation could allow more expansion by changing the word size. But your idea is well th...
by thomas9x
Wed Nov 27, 2013 4:52 pm
Forum: er9x
Topic: Up-Link for ER9X [Magi(C)] a vision...
Replies: 58
Views: 16037

Re: Up-Link for ER9X [Magi(C)] a vision...

Sort of like Mike's suggestions, here's my input: Instead of an 8-bit word I'd truncate it down to 4-bit (16 on/off devices) to reduced the overhead time. Also it may help to use 2.0mS for start, 1.0ms for stop, 1.75ms for logic one and 1.25ms for logic zero. This would allow a more relaxed asynchro...
by thomas9x
Tue Nov 19, 2013 10:52 pm
Forum: The Pickled Gnu (The Pub)
Topic: Happy birthday to me!
Replies: 11
Views: 2881

Re: Happy birthday to me!

Looks to me like the LCD needs replacement. The stock 9x display should fit fine with minor mods to the frosting.
Happy Birthday!
by thomas9x
Fri Nov 15, 2013 8:10 pm
Forum: General RC Electronic Projects and Discussion
Topic: The Future T9X Radio Project
Replies: 14
Views: 5186

Re: The Future T9X Radio Project

I came across this DJI Phantom Tx kit that is being promoted by a developer. It requires a donor Phantom R/C Tx to build it. I realize it is not what you are looking for, but the photos will give you more reference examples for your DiY Tx case project. For starters, it does not look like a layout I...
by thomas9x
Mon Oct 28, 2013 11:15 pm
Forum: The Pickled Gnu (The Pub)
Topic: How to convert a USB to wireless
Replies: 5
Views: 5595

Re: How to convert a USB to wireless

I wonder what 'key word' you used to do the search. The Newegg item never showed up on my google search.
The link posted by Kilrah said the wireless standard is called Certified Wireless USB. So I Googled that name.

- Thomas
by thomas9x
Fri Oct 25, 2013 3:52 am
Forum: The Pickled Gnu (The Pub)
Topic: How to convert a USB to wireless
Replies: 5
Views: 5595

Re: How to convert a USB to wireless

http://www.newegg.com/Product/Product.aspx?Item=9SIA30X0ZC8453 http://www.amazon.com/Belkin-Certified-Wireless-Adapter-F5U302/dp/B000UYWTWS/ref=pd_sxp_f_pt http://www.iogear.com/product/GUWIP204/?src=PP_GUWH104KIT http://www.iogear.com/product/GUWH104KIT/ BTW, there's probably more examples out ther...
by thomas9x
Thu Oct 17, 2013 11:44 pm
Forum: The Pickled Gnu (The Pub)
Topic: How to make a led flashing antenna cap
Replies: 13
Views: 4880

Re: How to make a led flashing antenna cap

While we are on this topic. in a whip/dipole antenna the center core and gnd shield is separated, no contact. while in a CL antenna the gnd and the center core IS connected via the 'leaves'. How does that work with the same 50 ohm impedance? A specialty antenna like the Cloverleaf (which is DiY 3-l...
by thomas9x
Fri Oct 11, 2013 4:08 pm
Forum: General RC Electronic Projects and Discussion
Topic: How to tune up the frequency on video tx and rx
Replies: 148
Views: 47404

Re: How to tune up the frequency on video tx and rx

What do you think? The inductor's specs appear to be fine for the task. Anything needs to be done for the gnd wire line? Do not place the choke/inductor on the ground path. Just use proper wiring standards for the ground path (single point Star ground wiring). http://www.lh-electric.net/tutorials/g...
by thomas9x
Tue Oct 01, 2013 5:07 pm
Forum: General RC Electronic Projects and Discussion
Topic: 9x Voice Recognition Control: Now we're talking!
Replies: 15
Views: 4893

Re: 9x Voice Recognition Control: Now we're talking!

as for not liking hanging boxes out side the Tx. Isn't the LCD screen a small box already. You make a good point. Originally the OLED was going to be optional (only used for programming the voice commands). But I like the nice flight mode graphics so it will stay on the 9x. This is one of those tim...
by thomas9x
Mon Sep 30, 2013 11:28 pm
Forum: General RC Electronic Projects and Discussion
Topic: 9x Voice Recognition Control: Now we're talking!
Replies: 15
Views: 4893

Re: 9x Voice Recognition Control: Now we're talking!

If there's no room inside the Tx then an external board-in-a-box is another solution. But I don't like mounting boxes on my R/C transmitter, so that is why the voice recognition hardware is inside the 9x's case. I can appreciate how some installations would need an external board, so it is indeed an...
by thomas9x
Sat Sep 28, 2013 10:04 pm
Forum: Hardware
Topic: RPM sensor
Replies: 84
Views: 17468

Re: RPM sensor

Haven't used Hobbywing's, but here is a brushless motor tach sensor that I created several years ago for an FPV OSD product. It connects to any two phase wires on the motor (or ESC). The Tach Signal output is electrically isolated from the motor (for protection).
brushless_tach.jpg
Brushless Motor Tach.
- Thomas

.
by thomas9x
Mon Sep 23, 2013 6:08 pm
Forum: The Pickled Gnu (The Pub)
Topic: Can't be good for the hobby :(
Replies: 17
Views: 4546

Re: Can't be good for the hobby :(

When a guy throws a shoe at the president you put the guy in jail, you don't ban shoes in the whole country. It's a bit more complicated. Unlike shoes which are considered essential to our lives, R/C models are perceived as unnecessary boy toys by the general public. Furthermore, the average Joe th...
by thomas9x
Mon Sep 23, 2013 12:10 am
Forum: er9x / gruvin9x / th9 based firmwares
Topic: PPM output too low on Turnigy9X/DM9
Replies: 2
Views: 1796

Re: PPM output too low on Turnigy9X/DM9

MWC arming should occur if the throttle is <1100 *and* roll stick is >1900mS. If yours is not arming with roll at 1996mS then perhaps the ACC did not pass the calibration or the model is not perfectly level. Is the status LED off (pass/level-ok) when you try to arm, or is it slowly blinking (not lev...
by thomas9x
Tue Sep 17, 2013 12:28 am
Forum: General RC Electronic Projects and Discussion
Topic: 9x Voice Recognition Control: Now we're talking!
Replies: 15
Views: 4893

Re: 9x Voice Recognition Control: Now we're talking!

The issue of false/bad voice command performance was a concern. So on the custom PCB there's an audio processing circuit that provides analog voice compression and voice level (VOX) detection. This added complexity might not be necessary, but it was included as a security blanket. But perhaps part o...
by thomas9x
Mon Sep 16, 2013 3:29 pm
Forum: General RC Electronic Projects and Discussion
Topic: 9x Voice Recognition Control: Now we're talking!
Replies: 15
Views: 4893

Re: 9x Voice Recognition Control: Now we're talking!

Possible to integrate all those 3 boards and lcd into one module and just plug in with one connector? My Sky9x tx is already full inside (one DHT and a 4T4P switch), I don't think there is room for 3 boards like that any more. An ambitious hacker could shrink the size a lot. But I doubt that is nec...
by thomas9x
Sat Sep 14, 2013 3:13 pm
Forum: General RC Electronic Projects and Discussion
Topic: 9x Voice Recognition Control: Now we're talking!
Replies: 15
Views: 4893

9x Voice Recognition Control: Now we're talking!

I thought it would be cool to have voice control for the flight phases on my Quadcopter. Here's what I ended up with: [BBvideo 425,350]http://youtu.be/4gLFX-GAI_s[/BBvideo] If you have any technical question please post them in my blog discussion (this keeps all the info in one place): http://www.rc...
by thomas9x
Fri Sep 13, 2013 11:44 pm
Forum: openTx
Topic: Need help with configuring 9x custom switches
Replies: 10
Views: 4053

Re: Need help with configuring 9x custom switches

Mike, that's some fantastic Boolean work! I think this issue can be put to rest.

I'd post screenshots but Mike's details are all that's needed. Just enter his magic custom switch logic and go fly.

- Thomas
by thomas9x
Fri Sep 13, 2013 7:30 pm
Forum: openTx
Topic: Need help with configuring 9x custom switches
Replies: 10
Views: 4053

Re: Need help with configuring 9x custom switches

You should be able to save one of CS3 and CS4 by using |a|< x PPM5 20. Brilliant, that's classic Muntzing. :) So here's the latest screenshots to help the next guy on this same journey: Custom Switches Screenshot genie_custom_switches.jpg Custom Functions Screenshot genie_custom_functions.jpg Fligh...
by thomas9x
Fri Sep 13, 2013 5:26 pm
Forum: openTx
Topic: Need help with configuring 9x custom switches
Replies: 10
Views: 4053

Re: Need help with configuring 9x custom switches

That is a great idea. With five flight modes your method indeed saves three custom switches. Unfortunately I need to free up a few more to handle my telemetry requirements. Any further suggestions would be fantastic. Here's screenshots of the changes. Custom Switches: genie_custom_switches.jpg Custo...
by thomas9x
Fri Sep 13, 2013 2:58 am
Forum: openTx
Topic: Need help with configuring 9x custom switches
Replies: 10
Views: 4053

Re: Need help with configuring 9x custom switches

Here's the details on how I implemented my flight mode announcements. My solution takes too many custom switches so I need help compacting it down to use less of them. I only needed four flight modes, which trigger when PPM5 (via the trainer port) is at 1000mS, 1250mS, 1500mS, and 1750mS. But in the...
by thomas9x
Thu Sep 12, 2013 5:51 pm
Forum: openTx
Topic: Need help with configuring 9x custom switches
Replies: 10
Views: 4053

Re: Need help with configuring 9x custom switches

Thought I had this solved, but still working on it. I've created the flight phases and that is working great (the 9X LCD correctly reports the flight modes). But I need help with the voice announcements, which work similar to this video shows: [BBvideo 425,350]http://www.youtube.com/watch?v=HWE3PVE0...
by thomas9x
Thu Sep 12, 2013 4:08 am
Forum: openTx
Topic: Need help with configuring 9x custom switches
Replies: 10
Views: 4053

Need help with configuring 9x custom switches

I am seeking advice on setting up some custom voices on my 9x (with Opentx-r-2249). In my project I'm providing an external PPM signal into the trainer input that is mixed to CH5 (and this part is working fine). I would like to have a different voice msg (flight mode) announcement as the CH5 pulse v...
by thomas9x
Tue Sep 10, 2013 5:26 pm
Forum: Other Electronic Projects
Topic: Sqare to Sine wave Converter
Replies: 13
Views: 5873

Re: Sqare to Sine wave Converter

For audio amp installations the Piezo signal's square wave sound quality can be enhanced with a simple RC filter. With this trick the tones I hear sound awesome (just as good as "real" sinewaves). Here is a screen shot of my 9X voice circuit that shows the beep signal's filter that feeds the audio a...
by thomas9x
Mon Sep 02, 2013 7:36 pm
Forum: General RC Electronic Projects and Discussion
Topic: How to tune up the frequency on video tx and rx
Replies: 148
Views: 47404

Re: How to tune up the frequency on video tx and rx

Some comments: 1. In some situations the diode may help reduce ripple (but not all) if it is used with the 470uF cap (cap installed directly to the module's power input pin). Additional noise reduction will occur if you also include a inductor (choke) in series with the diode. The inductor should be...

Go to advanced search