RkBlog

Simple Django applications for writing Facebook applications and authentication

Creating Facebook applications or integrating websites with Facebook isn't complex or very time consuming. In case of Django there is for example very big django-facebook package that provides a lot of Facebook related features.

Pozytywnie.pl, a company I work with released a set of small applications that were used internally to make Facebook applications as well as Facebook authentication integrations. In this article I'll showcase those applications.

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Example Ember.js + Django + Django Rest Framework single-page application

Ember.js is one of JavaScript frameworks for creating interactive single page web applications. Pages may change but the browser doesn't reload the page. This framework has some similarities with Django and can be good pick to start with such frontend applications for Django developers with some JavaScript knowledge.

In this article I'll show you an example Django + Django Rest Framework + Ember.js application. Classical posts and categories done in Ember and in Django for comparison.

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Image alignment with imgalt for stop motion astronomical animations

When photographing Sun with H-alpha solar telescope we can easily see prominences, but showing their movement with time may be hard as it's hard to align all images for a smooth animation. There is however an application for that called imgalt.

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Get IMX174 and make it cheaper as a IMX249

IMX174 cameras offer low noise, vertical lines free images at very high framerates with global shutter. Point Grey or Basler cameras with those sensors are now in use mostly for solar imaging, but some also use it on planets. High quality and performance comes at a cost. Grasshopper 3 camera with IMX174 costs around $1300 which is around 4 times the price of cameras like ASI120MM, QHY5L-II or PGR Blackfly similar cameras.

Sony announced a new sensor IMX249, which also showed up on Point Grey Blackfly camera list. Instead of 162 FPS there is up to 41 FPS, but the price may be even less than half of the Grasshopper 3 price. Sensor performance is expected to be very similar to IMX174.

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PyBoard and MicroPython in examples - scripting electronics with Python

So we continue our adventure with PyBoard and MicroPython. In this article I'll show how to use various electronic and electric parts with PyBoard - like DC and stepper motors, I2C devices, relays and sensors.

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