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Linux KMS driver for Acer C120

by ao2, July 8, 2015
in

Hans de Goede informs me that he has been working on gm12u320-kms: a new linux kernel driver for the Acer C120 mini projector, and possibly other devices based on the Grain Media GM12U320 USB3 bridge chip.

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Seasonal plots, with gnuplot

by ao2, March 19, 2015
in

Sometimes there is the need to plot some events which have a periodic trend.

Let's consider a seasonal phenomenon; a typical plot may not fully highlight the regularity of the periodic behavior:

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Teclast X98 Air 3G: unbricking a Bay Trail tablet

by ao2, December 30, 2014
in

While I was trying to boot a vanilla linux kernel on the Teclast X98 Air 3G I messed up a bit with the UEFI firmware settings: the battery was not recognized anymore, the tablet was rebooting right after showing the UEFI firmware boot screen, and USB-host was not working either; so no keyboard for accessing the firmware menu to restore the default settings, and no ADB for running flashrom or the Intel FPT to reflash the firmware with.

Teclast X98 Air 3G, internals
Teclast X98 Air 3G, mainboard
ISP with a logic level converter, top
ISP with a logic level converter, angle
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Teclast X98 Air 3G: cheap Intel Bay Trail tablet, getting acquainted

by ao2, November 21, 2014
in

I got a Teclast X98 Air 3G tablet from Aliexpress, it costed 168 € ( with free shipping) and has a high-definition screen and it's an Intel Bay Trail device; so Android, x86 architecture, 2GiB of RAM and 32 GiB of storage on EMMC.

boot logo 1
boot logo 2
Attached files: 
application/octet-stream icondmesg-Teclast_X98_Air_3G.log
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Prototyping a vocoder with GStreamer

by ao2, September 10, 2014
in

A vocoder is basically a tool to turn any sound into something which can “speak”, some examples can be seen in this Collin's Lab episode about MIDI, or in this classic from the Kraftwerk (the vocoder effect starts at 1:06):

Whether you are planning to ask for a ransom, or joining the Daft Punk, or taking a time travel to the '70s: a vocoder is always handy.

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KITT showing an Applesoft BASIC program

by ao2, August 25, 2014
in

I was watching a Knight Rider episode (namely from Season 3, Episode 1: Knight of the Drones) and I spotted some source code of a program listed by KITT.

Attached files: 
application/octet-stream iconApplesoft BASIC source code
application/octet-stream iconTokenized Applesoft BASIC program
application/octet-stream iconDOS3.3 disk image with the program listed by KITT
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PS3 BD Remote Controller under raspbmc (or XBMC)

by ao2, June 12, 2014
in

Here are some notes about how to use the PS3 BD Remote Controller with raspbmc (raspbmc is an XBMC distribution optimized for the Raspberry Pi).

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JMP-rope, the theory and the software

by ao2, April 16, 2014
in

The mathematical model behind the JMP-rope, as for any rotating POV system, is the polar coordinate system.

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JMP-rope, the hardware

by ao2, April 16, 2014
in

The hardware of the first JMP-rope prototype is very simple:

JMP-rope internals overview
JMP-rope handle detail
JMP-rope LED strip tied to the rope
JMP-rope programming socket
JMP-rope lit up
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