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SparkFun Electronics will be closed in observance of memorial day on Monday, May 29th. We will resume normal business hours on Tuesday, May 30th. Any orders placed after 2pm Mountain Time on Friday, May 26th will process and ship out on Tuesday, May 30th.

Casainho

Member Since: January 7, 2008

Country: United States

  • I asked about wood because I have a scale of wood: http://code.google.com/p/casainho-projects/wiki/SdCardBathroomScale#Technical_detailsScale_Jata_Hogar_490

    and because wood should be more easy to cut/handle.

  • Nice to know they are back in stock.

    How can I fix the sensors to say, a wood sheet or metal sheet?

    Is anyone interested in building a wireless Open Source bathroom scale to be used with the Open Source Android software “Smart Weight Chart”? —> please see here my actual prototype (using a commercial $20 bathroom scale): http://code.google.com/p/casainho-projects/wiki/SmartScale

  • I have now 2 units of RHT03 which I am running at 3.3V (GND at pin 3).
    I am using a fluke multimeter and another one from unknown brand, to verify the temperature readings by the RHT03. On both two RHT03 I have, I read more 2,4ºC from value reading on multimeters!! – I am not happy with RHT03 sensor :-(

  • I contacted Sparkun and asked for a new sensor, since I almost destroyed the other to discover the problem of exchanged pins – they just sent me a new one as I expected.
    Hmmm, the true is that I didn’t yet verified the temperature and humidity against another calibrated sensor/monitor… I think I am getting high values of humidity and that they are incorrect – I will verify and if so, then I will move to 5V as you say! thanks ;-)

  • I got my sensor just a few days ago. It was marked in enclosure as RHT03.
    It was not working until I decided to open it up and I found that the pin nr 4 is the unconnected and the nr 3 is the GND!! I was following this guide: http://www.ladyada.net/learn/sensors/dht.html
    The sensor works with 3.3V for me, as you can see on the pictures. One picture shows the connection of only pins 1(3.3V) , 2(Data) and 3(GND). Other picture shows the data line on oscilloscope and the bits “produced” by the sensor :-)
    It’s bad the incomplete documentation of Chinese sensors/components :-( – I am now an unhappy SparkFun costumer because I took a lot of time to get the sensor working and now I have an “incomplete” sensor because I had to cut off and remove the plastic enclosure.
    http://www.flickr.com/photos/43558168@N00/6134478453/sizes/l/in/photostream/
    http://www.flickr.com/photos/43558168@N00/6134478765/sizes/l/in/photostream/

  • I would like to know the measures of the board/LCD. Also I would like to know the schematic and if the LCD have back light.
    Thanks.

No public wish lists :(