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DaAwesomeP

Member Since: October 10, 2013

Country: United States

  • How many mA does this draw at maximum load? I’m trying to decide what battery and charger to get to combine this with an OpenLog (6mA) and MPL3115A2 (40 microAmps). They’re going to need to collect data for several hours (anywhere from three to five).

  • How about 720p (this is the 2010’s; HD is much cooler):

    • 720p = 1280 x 720 = 921600 pixels. Each panel is 32 x 32 = 1024. 921600/1024 = 900 panels.
    • 900 panels with the current 100+ volume pricing = 900 x $31.96 = $28,764. A big price for the average hobbyist. That’s excluding what you’ll need to power and process what goes into these.
    • The width, 1280/32 pixels = 40 panels. 40 panels x 7.5 inches = 300 inches, or 25 feet, or 8.33 yards, or 7.63 meters.
    • The height, 720/32 = 22.5 panels. That would leave you with have a panel extra, or 1280x736! 22.5 panels x 7.5 inches = 168.75 inches, or 14.0625 feet.

    A major LED panel/display seller is Daktronics. There are no prices on their website, but I do wonder if those are more or less expensive than this. This probably wouldn’t fair well in bad weather though.

  • Does that include a Breakout Board? I saw it is on the new Weather Shield.

  • One suggestion: Omit the ambient Light Sensor. I think that most people buying this board would just the most common data (Wind, Temperature, Humidity, Pressure). I mean honestly, 12:00AM: dark; 1:00AM: dark; 5:00AM a little lighter; 8:00 AM: very bright. If you really wanted to measure it, you could either attach the breakout board separately or just use a photo resistor. Maybe there could be an “expansion port.”

    Just a suggestion

  • Thanks so much! I can’t wait to get started on this project!

  • Thanks for your help!

    1. So could I just plug in the Humidity/Temperature Sensor and Barometric Pressure/Temperature Breakouts directly into the I2C on the Arduino?

    2. I noticed that the Barometric Pressure Sensor runs at 3.3v, but what about the Humidity Sensor?

    3. I noticed that there is a portion on the schematic that is dedicated to the Weather Meters (Wind and Rain). Would I have to change any of it to use it with an Arduino? (would there be voltage problems?)

    4. Lastly, I am going to use a Raspberry Pi as the data logger/web server (I may end up using a faster computer for the server). Should I just use USB/Serial (Serial over USB; built into the Arduino Board) or would I2C be faster? I would have the Arduino as the master and then send the processed information to the Raspberry Pi. Would the SDA/SCL lines be slower because of the sensors on the “network?” It seems (from what I saw in the code) that the Arduino would be constantly sending data to the Raspberry Pi, not only if there is a change (I could alter this, of course). So, USB/Serial or I2C? Now that I think of it, what about SPI?

  • I am really interested in this product!

    1. Which is better (more accurate) for measuring temperature? The BMP085 or the SHT15?
    2. Could I build the board/circuit myself with an Arduino Uno, or would I need to buy a raw AtMega 328 (needs to support the Weather Meters)?

    Thanks.

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