Search found 637 matches

by paul
Sat Mar 07, 2015 11:20 am
Forum: JeeNode and Wireless
Topic: Carrier hopping
Replies: 1
Views: 3584

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: 4357

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: 3858

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: 7324

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: 4031

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: 5811

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: 3733

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: 5435

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: 4974

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: 4747

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: 5006

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: 8394

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 ...
by paul
Sat Sep 27, 2014 1:28 pm
Forum: Sensors
Topic: Wind Sensor As Hot Wire Microphone
Replies: 1
Views: 5557

Re: Wind Sensor As Hot Wire Microphone

Mikrotopia, Sorry about the really slow reply. You probably figured out by now that the modern device wind sensor is completely inadequate for sound sensing. The thermal time constant (you may have to Google that) makes it way too slow to detect anything but perhaps 3-4 hz, so not much fun. It is po...
by paul
Sat Sep 27, 2014 12:47 pm
Forum: Sensors
Topic: Wind sensor position, reading variations, temperature off
Replies: 1
Views: 4822

Re: Wind sensor position, reading variations, temperature of

dhrenewables, I'm sorry about the really slow reply. I need to get a mod installed that will ping me when there are messages in moderation. There are a lot of things that it might be. Why don't you call the shop at 401 709-2424 in the early afternoon M,T,Th,F and I'll try to talk you through some th...
by paul
Wed Aug 13, 2014 2:08 pm
Forum: Sensors
Topic: Wind Sensor turn on and off NTC heating
Replies: 1
Views: 5829

Re: Wind Sensor turn on and off NTC heating

A MOSFET switching ground of the whole sensor would work.
Just don't read your output while the sensor is off.

Paul
by paul
Wed Aug 13, 2014 2:06 pm
Forum: Sensors
Topic: Current sensor - questions about its design
Replies: 1
Views: 4647

Re: Current sensor - questions about its design

fredriknyman,

It's just a general purpose op-amp - a lot of other rail-to-rail types will work.

Paul
by paul
Sun Jul 13, 2014 6:22 pm
Forum: Sensors
Topic: Wind sensor schematic
Replies: 5
Views: 8867

Re: Wind sensor schematic

Dalhimar, Sorry for the slow reply I'll get around to getting my forum to notify me. There are few features on the forum that aren't built in and one is posts pending moderation. The line TempCtimes100 = (0.005 *((float)TMP_Therm_ADunits * (float)TMP_Therm_ADunits)) - (16.862 * (float)TMP_Therm_ADun...
by paul
Sun Jul 13, 2014 6:09 pm
Forum: Sensors
Topic: Does the RHT02/DHT21 need a pull-up resistor?
Replies: 1
Views: 5874

Re: Does the RHT02/DHT21 need a pull-up resistor?

You can also use built in pin pullups on micrcrocontrollers that support pin pullups,
e.g. most modern microcontrollers

Paul
by paul
Sun Jul 13, 2014 6:07 pm
Forum: Hardware
Topic: BUB 1
Replies: 2
Views: 4500

Re: BUB 1

Dave, I apologize for the really slow reply. Did you solder up the logic level selector? (Use 3.3V for the most universal choice). You can also put the headers and shunt on it, but most people find the header sort of sticks up too much for their taste. Uploading used to work fine at slower speeds wi...
by paul
Sun Jul 13, 2014 6:01 pm
Forum: Hardware
Topic: SHT 21 Sensor with Raspberry Pi
Replies: 1
Views: 3733

Re: SHT 21 Sensor with Raspberry Pi

hopefully you'll get an answer from another user.
I don't have any depth in python/pi troubleshooting.

Paul