Thursday, September 13, 2012

YAMAKASI Catleap Q270 LED SE 27 Monitor is Mac Compatible

For coding, this is the same step up for me that going from a 1280x1024 to 1920x1080 made, in terms of making it easier to work. The Catleap Q270 SE is compatible with my 2009 mac mini.

You have to make sure that you have a display port to dual link dvi adapter. Whatever you have, make sure you can find a dual link dvi adapter. I am using the 99$ Apple display port to dual link dvi adapter. One thing to note is if you use this adapter, make sure to plug the usb portion of it in, otherwise it will not work.

The monitor comes with it's own power brick.

One thing to note is that if you turn the monitor off for some time, and then turn it back on, there is some fuzziness, which can be solved by unplugging the dual link dvi cable and replugging it back in. I don't know why this happens.

Here is a close up of the same area of the screen, fuzziness with and without.

Xcode is going to be way more easier to use with this screen. For $329 off ebay I do consider it a deal. When I hook it up to my pc for gaming, it goes to 120hz. I didn't even buy the 2B specific version.

Monday, September 3, 2012

Arduino Dormant Labs PH Shield Tutorial

UPDATE: This product has been replaced by its successor:

Here is a quick setup guide to help you get started measuring ph using arduino.

You will need:

1. Take your arduino and insert the ph shield on top of it.
2. Connect your PH Probe to the shield.

3. Download the Arduino Dormant Labs PH Shield Sketch , open it in the arduino IDE, and then upload. If you do not have the Arduino IDE installed, go to the Arduino site. Make sure you are using arduino IDE 1.0 or higher.

4. After uploading, open the serial monitor. The button is in the top right hand side of the Arduino IDE. It should start showing scrolling text similar to below. Don't worry about the values yet, they will be correct once we calibrate the ph probe. Leave this serial monitor window open on your computer.

5. Pour the 7.0 calibration solution into one cup, the 4.0 calibration solution into a second cup, and tap water into the third.
6. Start by rinsing your ph probe in the tap water.
7. Now immerse the tip of the probe into your 7.0 calibration solution. Swirl it around for 10 seconds, then press the calibrate button on the ph shield.

8. Now re-rinse the probe in the water.
9. Now immerse the probe in the 4.0 calibration fluid, swirl around for 10 seconds, and then press the calibrate button.
10. Your ph shield is now calibrated! The serial monitor in the arduino ide now will show correct information. You can now alter the sketch however you like.