Search found 639 matches

by paul
Tue Jan 10, 2017 11:02 pm
Forum: Hardware
Topic: Is the LCD117 able to receive 3.3V logic signals?
Replies: 8
Views: 5309

Re: Is the LCD117 able to receive 3.3V logic signals?

JHornbr225,

I believe we tested the LCD117 at 3.3V and it ran fine.
You would need a 3.3V LCD - which we have in the shop BTW.
Most of them are pretty flaky at low voltage.

Paul
by paul
Fri Dec 16, 2016 6:18 pm
Forum: Sensors
Topic: Hot wire wind sensor tutorial?
Replies: 1
Views: 2656

Re: Hot wire wind sensor tutorial?

sandman,

You need to use our Arduino sketch that has software temp compensation. It's not that great but much better than no compensation.

We're still working on new models and new data.
by paul
Fri Dec 02, 2016 7:10 pm
Forum: Sensors
Topic: Wind Sensor Followup
Replies: 4
Views: 3573

Re: Wind Sensor Followup

Vicengineer,

If you're still listening, maybe call us if you haven't already.

Paul
by paul
Fri Dec 02, 2016 7:08 pm
Forum: Sensors
Topic: Wind Sensor (Rev P) Help
Replies: 1
Views: 2989

Re: Wind Sensor (Rev P) Help

Mike,

I think I answered this in another post.
Scale the windADunits appropriately 3.3/5.0

Paul
by paul
Fri Dec 02, 2016 7:06 pm
Forum: Sensors
Topic: Wind Sensor (Rev P) Help
Replies: 3
Views: 3313

Re: Wind Sensor (Rev P) Help

mstrange,

Try scaling those windADunits down by 3.3/5.0 and see what you get.

PB
by paul
Fri Dec 02, 2016 7:01 pm
Forum: Sensors
Topic: Issues with Pulse Sensor & Teensy
Replies: 7
Views: 4899

Re: Issues with Pulse Sensor & Teensy

wintrmute, This issue you ran into is that the I2C code in my library was bit-banged for the Arduino. It's probably not too much of an issue to swap the Teensy pins you want to use in the code. You'll need to feel comfortable with modding libraries though. You can look for the library that a custome...
by paul
Fri Dec 02, 2016 6:56 pm
Forum: Sensors
Topic: How to power up Pulse Sensor using external battery?
Replies: 2
Views: 2829

Re: How to power up Pulse Sensor using external battery?

nternetizen,

The problem is the power up issue with the I2C lines. Push the reset line on your microcontroller and you should see the sensor power right up.

PB
by paul
Fri Dec 02, 2016 6:54 pm
Forum: Sensors
Topic: Wind Sensor Rev P updated code?
Replies: 1
Views: 2408

Re: Wind Sensor Rev P updated code?

perb,

Sorry for extended reply.
the ambient isn't going to vary that much with this sensor. Especially at rocket speeds.

Paul
by paul
Fri Dec 02, 2016 6:52 pm
Forum: Sensors
Topic: current sensors
Replies: 2
Views: 2805

Re: current sensors

avgreg46, Our sensor will work really well for this (it's really easy to sense 50 amps right through a line cord) but you'll need to hook it up to a solid state relay - and also to some kind of DC power source. It would be fairly easy to hook the output up to a solid state relay without a microcontr...
by paul
Fri Dec 02, 2016 6:49 pm
Forum: Sensors
Topic: Pulse/Heartbeat Sensor
Replies: 1
Views: 1979

Re: Pulse/Heartbeat Sensor

sx3374, The PSO2 code still leaves lots to be desired. It is supposed to a "ratio of ratios". Instead the code is just a ratio of IR over Red. The PSO2 signal is not that exciting a signal because with reasonably healthy people it will be 98-100 percent and NEVER VARY. It is possible to de-saturate ...
by paul
Fri Dec 02, 2016 6:44 pm
Forum: Sensors
Topic: Wind Sensor rev C zero wind adjustment
Replies: 2
Views: 2976

Re: Wind Sensor rev C zero wind adjustment

vgatesr

See my other answer.
zeroWindAdjustment can be negative.

pb
by paul
Fri Dec 02, 2016 6:42 pm
Forum: Sensors
Topic: Zero wind adjustment(nan)
Replies: 1
Views: 2225

Re: Zero wind adjustment(nan)

vgatesr

Code:"const float zeroWindAdjustment = 0.2;"
If you can't bring it into calibration by changing the zero wind speed it MAY be damaged BUT
try zeroWindAdjustment with a negative value
Also make sure you have a solid regulated 5 volt supply to the sensor.

pb
by paul
Fri Dec 02, 2016 6:39 pm
Forum: Sensors
Topic: Wind Sensor Rev P - output voltage with no wind
Replies: 2
Views: 2916

Re: Wind Sensor Rev P - output voltage with no wind

rio_schad ,

The Rev P will actually saturate at closer to 7 volts but this will be with wind speeds upwards or 100 mph

PB
by paul
Fri Dec 02, 2016 6:38 pm
Forum: Sensors
Topic: Wind Sensor Rev P - output voltage with no wind
Replies: 2
Views: 2965

Re: Wind Sensor Rev P - output voltage with no wind

rio_schad,

The sensor does not have a zero voltage - zero wind value because the sensor needs to be kept hot. This is the is the standard way that all hot wire anemometers work. The added voltage is proportional to about the square root of the wind speed.
by paul
Fri Dec 02, 2016 6:36 pm
Forum: Sensors
Topic: Wind Sensor Rev. P New Scketch???
Replies: 1
Views: 2074

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: 6470

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: 2101

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: 8651

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: 2390

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: 5011

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...