Search found 656 matches

by paul
Tue Apr 08, 2014 10:17 am
Forum: Sensors
Topic: Wind sensor schematic
Replies: 5
Views: 9634

Re: Wind sensor schematic

my need is to get a sensor that is accurate to wind speed from about 2 to 35 mph. I consider slight breezes to not really be wind, so the low-low end is not as important. over 35 mph and patio furniture starts to turn over. I think the sensor as it is now with the RV ouput for signal and the TMP ho...
by paul
Wed Mar 26, 2014 3:52 pm
Forum: Sensors
Topic: Wind sensor schematic
Replies: 5
Views: 9634

Re: Wind sensor schematic

You are correct that in the most standard schematic both sensors are part of the wheatstone bridge. The NTC thermistor though, has enough issues with non-linearity that we found locating a thermistor that even began to approximate the response in the bridge while being 50C cooler was a tough order t...
by paul
Sun Mar 16, 2014 12:58 pm
Forum: Sensors
Topic: Current sensor @ low current (11w)
Replies: 1
Views: 6081

Re: Current sensor @ low current (11w)

Musk, You are correct that the current sensor is extremely sensitive to position. Also consider making the wire slightly diagonal (askew) if that optimizes setting. We have measured currents that small in shop (11 watt compact flour. bulbs) very repeatably. One thing you can do is to average togethe...
by paul
Sun Mar 16, 2014 12:05 pm
Forum: Sensors
Topic: Connecting WIND sensor to PC + reading it
Replies: 1
Views: 6062

Re: Connecting WIND sensor to PC + reading it

There is now a sketch (with a link on the wind sensor page) that will give you some rough MPH speeds from the wind sensor and make it much less immune to changes in ambient.
by paul
Sun Mar 16, 2014 12:03 pm
Forum: Connecting to BBB, RBBB
Topic: BUB II --> Unknown devices
Replies: 1
Views: 5199

Re: BUB II --> Unknown devices

alextre, Sometimes Windows has a hard time finding the drivers or getting them installed correctly. Please download the drivers to a known location. The open the device manager and look for "USB COM Port" (or something similar). Click through and then click "Update Drivers" Choose the manual option ...
by paul
Sun Mar 16, 2014 11:59 am
Forum: Sensors
Topic: Current sensor @ low current (11w)
Replies: 1
Views: 5602

Re: Current sensor @ low current (11w)

Musk, Your sensor should have come with mini zip ties, no? Maybe we weren't doing this in the early days of the sensor. In any case mini zip ties make a good permanent joint, that can be undone at any times. And yes, the output will vary with the location of the wire to the sensors. In particular, d...
by paul
Sat Mar 01, 2014 10:22 am
Forum: Sensors
Topic: Wind sensor fall response time.
Replies: 18
Views: 27642

Re: Wind sensor fall response time.

Glad everyone is working out this issue. I also urge wind sensor builders to try the MPXV - one of my friends built a instrument that works well with that. It's a pressure sensor, so the response if more symmetrical. One would need to use some kind of orifice to generate the required pressure. Regar...
by paul
Fri Feb 28, 2014 1:08 pm
Forum: JeeNode and Wireless
Topic: Adafruit OLED on JeeNode Port?
Replies: 1
Views: 6201

Re: Adafruit OLED on JeeNode Port?

cootcraig , Sorry about the really slow reply, my forum doesn't seem to be notifying me again. You can just look up the JeeNode arduino pin numbers and assign them individually. The Arduino native SPI port is in use for the radio though, so hopefully Lady Ada has written her library to support any p...
by paul
Fri Feb 28, 2014 12:57 pm
Forum: JeeNode and Wireless
Topic: Library Issues for RFM12B
Replies: 1
Views: 4780

Re: Library Issues for RFM12B

kramerica,

I trust you got this working?
by paul
Fri Feb 28, 2014 12:56 pm
Forum: Sensors
Topic: Proximity sensor question
Replies: 2
Views: 6801

Re: Proximity sensor question

Gaba, 1) http://moderndevice.com/wpcontent/uploa ... _AP580.pdf in the link above there is a PDF and in the 4th and 5th page i see sensing range looks like circle but after i tested it looks like inverse parabola or egg check this out( https://lh3.googleusercontent.com/-KR2T ... /aaass.png ) so i am...
by paul
Sat Feb 15, 2014 12:02 am
Forum: JeeNode and Wireless
Topic: Errors compiling RFM12B Demo sketch?
Replies: 1
Views: 4585

Re: Errors compiling RFM12B Demo sketch?

The issue is definitely that Arduino is not seeing your library. Are you using a fairly recent version of Arduino? The JeeLib library is just named "JeeLib" and is the the libraries folder (you might need to make this) inside of the Arduino folder, where you are saving your sketches? You can confirm...
by paul
Tue Jan 28, 2014 9:14 am
Forum: JeeNode and Wireless
Topic: Hardware newbie project - Wireless exterior LED strip contro
Replies: 4
Views: 8752

Re: Hardware newbie project - Wireless exterior LED strip co

Craig, Sorry about the slow response, I'm going to install a mod to the board that sends me email when a post is waiting in the moderation queue. Why it wasn't built in is completely mysterious to me - seems like a no-brainer. In any case, your further posts shouldn't hit the moderation queue. Is th...
by paul
Sun Jan 26, 2014 4:58 pm
Forum: JeeNode and Wireless
Topic: Hardware newbie project - Wireless exterior LED strip contro
Replies: 4
Views: 8752

Re: Hardware newbie project - Wireless exterior LED strip co

cootcraig, It seems like a fairly straight forward process with the LEDnode. Check out the LEDnode docs over at JeeLabs, and see blog posts beginning at http://jeelabs.org/2011/11/04/a-sketch-for-the-lednode/ One weaker point to JeeNodes is the lack of a really simple hello world example. This is on...
by paul
Mon Jan 20, 2014 6:05 pm
Forum: Hardware
Topic: Current Sensor locking up arduino
Replies: 6
Views: 8604

Re: Current Sensor locking up arduino

wiki, I was thinking about this and there really is no model for "locking up Arduino" Unless you have something like the exit command in your code, or an endless loop - the Arduino chip is going to run the program. When an Arduino with a bootloader starts after power cycle or reset, it basically has...
by paul
Sat Jan 11, 2014 12:09 pm
Forum: Hardware
Topic: lm4889
Replies: 1
Views: 3719

Re: lm4889

Basically you want a small 8 ohm or 4 ohm speaker. A 4 ohm speaker will yield greater audio power (and also greater current draw). The amplifier only generates around 1 watt so larger speakers will not do you much good. We have 8 ohm speaker in the shop, that is the correct size for the ever-popular...
by paul
Fri Jan 10, 2014 4:41 pm
Forum: Sensors
Topic: TMP421 on Arduino YUN
Replies: 5
Views: 9909

Re: TMP421 on Arduino YUN

If you're intrepid you can probably just mod the code in the library to remap for the correct pins. We're due to get some Yun's in the shop soon (I've been traveling so will be back next week) so I can test your code or come up with some of my own to work with the Yun. We also have a pull request pe...
by paul
Fri Jan 10, 2014 4:38 pm
Forum: Sensors
Topic: HMC5883 compass centering drift
Replies: 2
Views: 7142

Re: HMC5883 compass centering drift

jwatte, You have a data display system set up so try some of the following: Insure that your data display system is bulletproof as communicating serial values can be slightly tricky requiring some means of insuring that X & Y data do not get swapped. Take a plastic straw or wooden chop stick and tap...
by paul
Fri Jan 10, 2014 2:09 pm
Forum: Hardware
Topic: Current Sensor locking up arduino
Replies: 6
Views: 8604

Re: Current Sensor locking up arduino

wiki, hmm - definitely haven't seen this before. Some different things do come to mind that are slightly tricky. Was the desktop or laptop plugged into the same AC line as the heater? Here is one thing I am thinking - when you switch off the heater this is definitely going to trigger a spike of some...
by paul
Tue Dec 17, 2013 9:08 am
Forum: Hardware
Topic: Fluxamasynth Shield documentation?
Replies: 13
Views: 16212

Re: Fluxamasynth Shield documentation?

Peter,

All the params are 7 bit values (127 max). The bank param only responds to 0 and 127.

Happy fluxing,

Paul
by paul
Mon Dec 16, 2013 9:28 pm
Forum: Hardware
Topic: Fluxamasynth Shield documentation?
Replies: 13
Views: 16212

Re: Fluxamasynth Shield documentation?

hanlonpp,

synth.programChange(bank, channel, voice); // is correct

Now I have to track down which docs are wrong. Can you point me to where we have it listed incorrectly?

Paul