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Install Firefox Android on Android AOSP

June 6th, 2020

A small update on an older post Install Android browsers without Google Play because the download link on Mozilla’s pages has changed.

https://download.mozilla.org/?product=fennec-latest&os=android&lang=multi (direct download)

Also F-droid is highly recommended for free and open-source software.

F-Droid is a community-maintained software repository for Android, similar to the Google Play store. The main repository, hosted by the project, contains only free/libre apps. Applications can be browsed, downloaded and installed from the F-Droid website or client app without the need to register for an account. “Anti-Features” such as advertising, user tracking, or dependence on nonfree software are flagged in app descriptions.

https://en.wikipedia.org/wiki/F-Droid

 

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Macro Photography with the Raspberry Pi HQ camera and reversing the lens II

June 4th, 2020

In a first post about Macro photography with the Raspberry Pi HQ camera I showed some pictures made with the reverse mounted lens technique and the new Raspberry Pi HQ camera.

But you might wonder what the exact setup was. So I show and describe it here. Yes, the 16mm lens is used upside down, or the wrong way. 😉

As I explained earlier. Normally you catch a big world in a small photo, and by reversing the lens you’ll get the opposite. You can make a small world big.

Exactly what you want for macro-photography.

 

Macro photography setup with the Raspberry Pi HQ camera and a reversed 16mm lens

Read the rest of this entry »

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Firefox Bug with clip-path

June 4th, 2020

Firefox has a rather silly bug with overlapping clip-path. Instead of hiding content it start showing content with overlapping clip-path.

In short:

.clip {
clip-path: inset(400px);
}

on a 600px image should not show any content. In Firefox it does.

You can see the problem here.

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Macro Photography with the Raspberry Pi HQ camera and reversing the lens

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June 3rd, 2020

The Raspberry Pi is a small computer, but it is a great machine for experimenting with all sorts of technology. The Raspberry Pi Foundation just introduced a new High Quality camera with changeable lenses, so let’s find out if that new camera board can be used for photographing small objects.

FruitflyRaspberry Pi HQ Camera

Fruitfly

And I’m gone a use a rather surprising but cheap technique: reversing the lens.

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Ubuntu 20.04 is running great (again) on older hardware

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May 20th, 2020

When Ubuntu made the move from Unity to Gnome3, with 18.04, my old su4100 laptop from 2010, did not run the new Gnome3 really well. So I tried out Mate, and in the end Kubuntu.

I was surprised that KDE was much smoother experience than Gnome3 on 18.04. At that moment.

Things improved with Gnome3 with 19.10, but now with 20.04 Ubuntu is running nice again on lower spec hardware.

Still a SSD is much needed, but my old su4100 2 core processor, is delivering a nice and smooth feeling with a fresh Ubuntu 20.04 install.

Great.

That’s why I like Linux. Free, open source, and more sustainable than Apple OS or Microsoft Windows.

 

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Upgrade deepspeech 0.7 on a Raspberry Pi 4

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April 25th, 2020

In an earlier post I described how to install deepspeech on a Raspberry Pi 4. That wasn’t exactly a really smooth install, but I managed in the end.

Upgrading to deepspeech 0.7 is much easier:

Activate the virtual environment:

source dev/deepspeech-train-venv/bin/activate

Upgrade deepspeech

pip install --upgrade deepspeech 
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting deepspeech
Downloading https://files.pythonhosted.org/packages/fc/e6/3bee97bf20761b9930d46638f4b8d96b3fcb84e1843d59e25c4b19f88acc/deepspeech-0.7.0-cp37-cp37m-linux_armv7l.whl (1.4MB)
100% |████████████████████████████████| 1.4MB 258kB/s 
Requirement already satisfied, skipping upgrade: numpy>=1.14.5 in ./dev/deepspeech-train-venv/lib/python3.7/site-packages (from deepspeech) (1.18.0)
Installing collected packages: deepspeech
Found existing installation: deepspeech 0.6.0
Uninstalling deepspeech-0.6.0:
Successfully uninstalled deepspeech-0.6.0
Successfully installed deepspeech-0.7.0