Search found 645 matches

by paul
Fri Dec 02, 2016 6:36 pm
Forum: Sensors
Topic: Wind Sensor Rev. P New Scketch???
Replies: 1
Views: 2152

Re: Wind Sensor Rev. P New Scketch???

Not right now. We hope to have something soon.

PB
by paul
Fri Dec 02, 2016 6:35 pm
Forum: Sensors
Topic: Wind Speed sensor - low speeds
Replies: 4
Views: 6612

Re: Wind Speed sensor - low speeds

Ribber, We tested the sensor in a wind tunnel we built. We had to include baffles to increase the pressure and decrease the speed for the lowest settings. We are not overly confident about our low speed data but it does sysch up with walking speed and tests we've done. It is also very easy to sense ...
by paul
Fri Dec 02, 2016 6:31 pm
Forum: Sensors
Topic: Rev P Wind Sensor equations with ambient temperature comp
Replies: 1
Views: 2175

Re: Rev P Wind Sensor equations with ambient temperature comp

No they are not the same as for the Rev C.
The Rev P contains hardware ambient sensing, so is MUCH less sensitive to ambient temperature changes. I hope to be posting some new regressions sometime in the next few months.

We realize they are long overdue.

pb
by paul
Fri Dec 02, 2016 6:29 pm
Forum: Sensors
Topic: Regarding Capsense Library on Arduino
Replies: 7
Views: 8883

Re: Regarding Capsense Library on Arduino

ranjit, I realize this question is very old, but I am answering for those who might find the information useful. You will find many links to capacitive sensing on the internet, many of them probably a tad confusing. There are several techniques in use and many small variations of them. Basically I b...
by paul
Wed Jul 20, 2016 7:36 pm
Forum: Hardware
Topic: RGB LED pixels dying?
Replies: 2
Views: 2495

Re: RGB LED pixels dying?

I haven't seen that before. You might monitor your power supply under some changing conditions to see if there appear to be spikes on the line. You would probably need an oscilloscope to see them however. You could try padding your 12 volt line with some largish capacitor like 1000u - make sure the ...
by paul
Sat Mar 07, 2015 11:36 am
Forum: Sensors
Topic: Wind Sensor usage and adjustment
Replies: 1
Views: 5074

Re: Wind Sensor usage and adjustment

Martyn, You may have moved on to other things by now but I'll answer this to have it in the forum. -- Is there a straightforward way to adjust the sensor in order to get an accurate, or at least consistent output despite naturally varying air temperatures from one day to another? The sketch is suppo...
by paul
Sat Mar 07, 2015 11:29 am
Forum: Sensors
Topic: Wind Speed sensor - low speeds
Replies: 4
Views: 6612

Re: Wind Speed sensor - low speeds

donalg, "It depends" - which I'm sure is not the answer you want. The sensors are exquisitely sensitive to low wind speeds. However the response varies greatly by the direction of the wind. Also it might be necessary to tweak the zero wind point up a tad, to make sure you don't miss the low end resp...
by paul
Sat Mar 07, 2015 11:23 am
Forum: Sensors
Topic: Wind sensor
Replies: 1
Views: 4333

Re: Wind sensor

Gbelcik, Your best bet is to provide some kind of low dropout regulator. You may need a shunt regulator if you can't find a low-dropout regulator that will work with that low a dropout, at a current of around 50mA. The problem you're seeing is mostly with the temperature reading which is mostly a vo...
by paul
Sat Mar 07, 2015 11:20 am
Forum: JeeNode and Wireless
Topic: Carrier hopping
Replies: 1
Views: 3765

Re: Carrier hopping

Jon, Hmmm, I'm surprised by the frequency hopping and would expect much tighter control also. If you just have one radio I'd like to see you test another before making any determinations. These are very inexpensive radios, mass produced in volume and while we do test them for transmission, and recep...
by paul
Sat Mar 07, 2015 11:14 am
Forum: Sensors
Topic: SHT21 LibHumidity library problem with Arduino 1.6.0
Replies: 1
Views: 4508

Re: SHT21 LibHumidity library problem with Arduino 1.6.0

hardmar,

Thanks for the bug report, we'll rev the library with some if-defs to deal with Ard. 1.6

Paul
by paul
Sat Mar 07, 2015 11:11 am
Forum: Connecting to BBB, RBBB
Topic: Adding LEDs for Rx and Tx feedback
Replies: 2
Views: 4114

Re: Adding LEDs for Rx and Tx feedback

bcharusa,

I'm not sure what context you're talking about. Our BUB boards and all of our boards that I can remember have at least one RX/TX activity LED.
Give me some more details, please

Paul
by paul
Sat Mar 07, 2015 11:09 am
Forum: Sensors
Topic: Pulse sensor problem
Replies: 6
Views: 7688

Re: Pulse sensor problem

We went over the library and revised it for Leonardo. Also due to work with Mega2560 chips shortly. Please download the latest version of the library from Github and you shouldn't have any trouble hooking it up.

Good luck and let us know if you have further problems,

Paul
by paul
Sat Mar 07, 2015 11:07 am
Forum: Hardware
Topic: Byteseeker 2.1 issues
Replies: 3
Views: 4256

Re: Byteseeker 2.1 issues

grgtrpp, Glad you got the board going, it's still being revised. The DIP switches are for future software development. In a performance environment you probably wouldn't want to flip through various sounds with blinking lights as feedback. They could be used for any kind of software development. I e...
by paul
Fri Nov 07, 2014 8:46 am
Forum: Sensors
Topic: Pressure Sensor
Replies: 2
Views: 5990

Re: Pressure Sensor

Don, You've probably figured this out long ago. (Sorry about the really slow reply) There are only three lines on the pressure sensor GND +V (5V) and the Vout line. The other pins are more for mechanical stability and all the pins are in parallel. If you use a meter on continuity you can confirm tha...
by paul
Fri Nov 07, 2014 8:44 am
Forum: Hardware
Topic: Connecting the LM4889 audio amplifier toa SparkFun MP3 shiel
Replies: 1
Views: 3917

Re: Connecting the LM4889 audio amplifier toa SparkFun MP3 s

djburke , The amp definitely needs a high-current ground connection, so I don't think the GBUF is going to work well. Ground on the amp needs to be your system ground. I think the VS10XX chip schematics show a capacitive coupling of GBUF to the reference inputs of the amp. If you look at the amp sch...
by paul
Fri Nov 07, 2014 8:32 am
Forum: Sensors
Topic: Wind Sensor
Replies: 2
Views: 5624

Re: Wind Sensor

LVX Here is how I did my regressions. Put your data into excel. for example voltage vs wind speed Subtract the zero wind value from the whole column. Plot a scatterplot chart. Add trendline and use the exponential function, check the show formula. You now should have a pretty decent fit to the curve...
by paul
Fri Nov 07, 2014 8:18 am
Forum: Sensors
Topic: Wind Sensor Colder Air
Replies: 1
Views: 5112

Re: Wind Sensor Colder Air

John559, Colder air is a complicated question. The temperature of the sensor is constant in the circuit. So colder air registers higher raw voltages (at still air), because it takes more energy to bring the sensor to temperature. When the sensor sees wind, there is less overhead before the output hi...
by paul
Fri Nov 07, 2014 8:08 am
Forum: Sensors
Topic: Windsensor outside measurements
Replies: 1
Views: 4891

Re: Windsensor outside measurements

LVX, The sensor is designed to have the "prongs" cut off. Use tinsnips and carefully cut in between the two sets of three pin headers. Put the electronics in someplace dry and mount the prongs in the weather. Use silicon or some other sealant to cover the soldered leads and the cracks around the cab...
by paul
Sat Sep 27, 2014 1:38 pm
Forum: Software
Topic: The Degree symbol º
Replies: 2
Views: 5288

Re: The Degree symbol º

mike2545, Sorry for the really slow reply. Try the character test button on the LCD117 and watch it scroll through the whole character set. If you don't see the symbol then maybe our docs are in error. It is possible that either they did not come from our LCD manufacturer or that our manufacture cha...
by paul
Sat Sep 27, 2014 1:33 pm
Forum: Sensors
Topic: Regarding Capsense Library on Arduino
Replies: 7
Views: 8883

Re: Regarding Capsense Library on Arduino

RANJITHTAMIL, There is a lot information in the Arudino playground under the capSense library. You can also Google around and see how others have implemented cap sensing. It's a very simple concept with a few pitfalls though, including the grounding issue. My guess is that a car seat should be very ...