Jekyll2017-02-21T14:39:27+00:00https://aliaafee.github.io//This is where I talk about my interests and projects. 2017-02-21T14:00:00+00:002017-02-21T14:00:00+00:00https://aliaafee.github.io//arduino/photography/electronics/2017/02/21/droplet-photo<h2 id="step-one-getting-ardunio-to-talk-to-the-camera-and-flash">Step One: Getting ardunio to talk to the camera and flash.</h2> <p>My camera is Canon Powershot G10 which has a external trigger port. The port is a standard 2.5mm stereo plug. I got the pinout from <a href="http://pinoutguide.com/DigitalCameras/canon_350d_shutter_pinout.shtml">pinoutguide.com</a>. Pin 1 is the shutter, pin 2 is focus and pin 3 is ground.</p> <p><img src="/assets/dropletphoto/triggerpinout.gif" alt="Camera trigger pinout" /></p> <p>Shorting pin 1 to pin 3(ground), makes the camera take a picture. I used a 2.5mm to 3.5mm converter cable to connect to the circuit.</p> <p>The flash I had was a Canon Speedlite 220EX. It did not have PC Sync Cable port, so I had to get a flash hot shoe with PC Sync port. I used a PC Sync to 3.5mm converter cable to connect to the circuit. To get the flash to trigger I simply had to short the two pins of the PC Sync Cable.</p> <p>I used Sharp PC817 optoisolators to short the pins. This will keep the arduino safe from high voltages from the flash.</p> <p>Circuit schematic:</p> <p><img src="/assets/dropletphoto/camera_flash_connector_schematic.png" alt="Camera Flash Connector Schematic" /></p> <p>Final setup:</p> <p><img src="/assets/dropletphoto/camera_flash_setup.jpg" alt="Final Setup of Camera and Flash" /></p> <p>Brown is ground. To trigger flash red should be set to high. To take a photo blue shoudl be set to high.</p> <h2 id="step-two-dropping-coins">Step Two: Dropping Coins.</h2> <p>I did not have an electronic water valve to control water drops, so to test out the trigger I made a setup to take pictures of coins dropping in water.</p> <p>Circuit schematic:</p> <p><img src="/assets/dropletphoto/coin_dropper_schem.png" alt="Coin dropper schematic" /></p> <p><a href="https://github.com/aliaafee/droplet-photography/blob/master/arduino/CoinDropper/CoinDropper.ino">Arduino code</a></p> <p>Servo controlled coin gate:</p> <p><img src="/assets/dropletphoto/coin_gate.jpg" alt="Coin gate" /></p> <p>This is the result:</p> <p><img src="/assets/dropletphoto/coin_drop.jpg" alt="Coin drop example" /></p>

Step One: Getting ardunio to talk to the camera and flash.

2017-02-21T00:00:00+00:002017-02-21T00:00:00+00:00https://aliaafee.github.io//git/github/2017/02/21/migrate-to-github<p>Moved all my svn repositories to git. My private repositories are stored in a folder in google drive. All the public ones are stored in GitHub. The <a href="http://john.albin.net/git/git-svn-migrate">“Complete Idiot’s Guide to git-svn-migration”</a> by John Albin was very helpful. Uploading the .git to GitHub was more of a hassel than expected. I ended up using GitHub Desktop to do it.</p>

Moved all my svn repositories to git. My private repositories are stored in a folder in google drive. All the public ones are stored in GitHub. The “Complete Idiot’s Guide to git-svn-migration” by John Albin was very helpful. Uploading the .git to GitHub was more of a hassel than expected. I ended up using GitHub Desktop to do it.

2017-02-20T00:00:00+00:002017-02-20T00:00:00+00:00https://aliaafee.github.io//introduction/2017/02/20/hello<p>This is my first blog. I may be a few decades out of date, but here goes.</p>

This is my first blog. I may be a few decades out of date, but here goes.