Pyboard can handle analog sensors and precise PWM control, but to get that we have to use one of the latest firmwares. So let us update the firmware and test it with an analog joystick and PWM controlled DC motor board.
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.
Some time ago I was writing about using USB powered Peltier modules to cool simple cameras like guiders or planetary cameras. Few days ago I've mounted such devices to my ASI120MM and got sensor temperature lower by around 10-15 degrees.
Quite recently I got IDAS Type 4 BGR filters. Those filters aren't just plain RGB filters. Aside of imaging in visual light to get RGB images those filters also allow false color imaging in infrared. Each filters passes a band in visible and infrared light. Depending if they are stacked with IR blocking or passing filter they work in one of those two modes. Infrared false color imaging opens new possibilities for interesting imaging of deep space objects as well as planets like Jupiter.
Let me introduce those IDAS Type 4 filters and describe how they work.
I've released a new version of django-ckeditor-updated covering all latest changes (full ckeditor 4.4.4 package and some inline editor fixes). The django-ckeditor-updated-4.4.4 can be installed from pypi. Note that there is now a new required configuration variable - CKEDITOR_JQUERY_URL.
All outstanding commits have been pushed to django-ckeditor repository (from which I forked) and released as django-ckeditor-4.4.4 (4.4.5 for updated readme). If you are using the "updated" version you can now switch to the django-ckeditor as I plan to make changes there as I now can push pypi releases for it. django-ckeditor-updated is closed.
Many Python web applications run on production with the help of gunicorn or uwsgi. There are however other solutions that may turn out to be even better than the currently popular solutions. One of alternatives is chaussette and circus. Chaussette is a WSGI server that can serve WSGI applications like your Django project. Circus is an application to control and monitor processes and sockets. It can manage chaussette, celery or other sockets and processes making it a manager of all project services.
MicroPython is a Python 3 implementation capable of working on microcontrollers with no operating system. PyBoard is the first microcontroller board running Micro Python. It can be scripted with Python code and can execute it, work without any connection to a PC. How does it work and what can we do with pyboard and Micro Python?
Programming on mini PC like Raspberry Pi, or Beaglebone Black maybe bit annoying or hard due to lack of some more complex IDEs not available on ARM platform, or just to resource heavy to such computers. Sometimes you may also lack keyboard, mouse and a display to connect to them. In such cases remote access and remote programming may be a solution. All you need is a network connection and proper applications and protocols.
In this article I'll showcase how to use SSH, SSHFS, VNC/RDP protocols/solutions for remote access and programming of any (mini) PC. I'll also show how to configure PyCharm to use external Python interpreter (like that from Raspberry Pi).
Accidentally (or not) a new revision of Raspberry Pi have leaked to the Matrix... web. The new revision is called Raspberry Pi B+ (the plus added). You get the same CPU, the same RAM, but 4 powered USB (as it requires 5V 2A power supply!), 40 GPIO pins (more!), and microSD instead of SD card slot.
Beaglebone Black is a single board computer and a Raspberry Pi challenger made by the BeagleBoard.org foundation. It offers 95 3.3V GPIO and newer CPU with Android and Linux support. In this article I'll go and check it performance and capabilities.