A Few New Photos Taken with the Linear CCD Back

I finally put together the 3D printed prototype and took a few photos last weekend. The flange distance was way off and it was quite hard to get the right focus. The CCD had quite a few dirt specks on it and it produced this weird streaking pattern when using a a small aperture. Also the sensor saturates easily, leaving lots of white streaks and artifacts. Nevertheless I was excited that I could finally fit it on my Bronica medium format camera body.

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First Photo Taken with the Linear CCD Camera

We have made lots of progress on our linear CCD project since the last article. Last week we spent some time and made a cardboard enclosure for the sensor and tired to take a photo. The good news is we did get a presentable photo, despite the obvious focus issue. The lens was a Nikkor 50/1.8 since the batteries in my Bronica were dead and the camera would not operate without it. The photo has a strong vignetting due to the lens’ small image circle. The camera was only a prototype, held together by hot glue and type. We will eventually design and 3D print an enclosure to house the […]

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New Project: Portable Light Meter using TSL2591

While Yichi is busy with his linear CCD project, I decided to start a small project (quite small when compared with Yichi’s CCD). This project will be a light meter for photography. I have a Mamiya 645 for medium format that does not have any metering to it. Right now I’m using a smart phone app that will get the reading from the camera. However, I’m just too lazy to grab my phone from my pocket – unlock the phone – open the app – take a snapshot and get the reading – finally dial that numbers into my camera. The meter consists of a TSL 2591 light sensor, a […]

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Teensy CMT + ADC DMA Experiment

After weeks of planning, I finally got the chance to test my setup for SSC7926 project for the first time. I’ll probably explain what is SSC7926 all about in one of the future posts, but for the time being it is my attempt to make a digital back for my medium format Bronica SQ camera using an ilx508 linear CCD. I plan to use a Teensy 3.6 to generate clock signals to drive the CCD, and sample the analog output from the sensor. For this proof of concept test, I used the Carrier Modulator Transmitter (CMT) on the k66 chip to generate the clock signal. CMT interrupt ISR was set […]

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Code Smart Timer and Ultimate Calculator with Qt

This time, I’ll show you a few projects I did last June. First, smart timer. Back then I wanted to learn some basics about GUI design, so I looked into PyQt. After doing some digging in the documents, I decided to do something for real. I really liked the simple design of Chris Dziemborowicz’s Hourglass, so I tried to imitate it to practice. I ended up with a timer which had more or less all the primary functions Hourglass had, and looked fairly similar. It could parse simple natural language inputs like “3 hours 5 minutes” or “5m 30s”, but once I press the “start” button, time would turn into […]

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Make Google Dictionary Extension better with AutoHotkey

The other day I was doing assigned reading for my General Education Seminar. As a non-native English speaker, my vocabulary is not something that I’m proud of, and some big words in the reading started to slow me down. I turned to Google Dictionary for help, but the article was unfortunately in PDF format. I could not simply select the word and click the dictionary extension button. It just does not work with PDF file. I had to copy the word, hit the button, paste the word and then hit enter. Apparently, that was too much of a hassle for a lazy person like me, so I decided to write […]

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Scraping Course Schedule with Beautifulsoup

Class registration is no easy task. Getting all the courses one likes often takes a lot of researching and planning. To complicate the matter, some of the sections do not have instructor listed. Today (well, actually a month ago) I am going to deal with this problem.

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