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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Arduino’ Category

Relays and Arduino / ESP8266 / ESP8266X

Posted by jpluimers on 2019/06/19

As a follow-up on Raspberry Pi and relays – follow up on Having one Raspberry Pi reset another Raspberry Pi through relay or transistor some of my research links to bring this to Arduino, ESP8266, ESP8266X and similar devices:

–jeroen

Posted in Arduino, Development, ESP8266, ESP8266X, Hardware Development | Leave a Comment »

Always watch your uA sources: The mystery of the Zombie RAM | josh.com

Posted by jpluimers on 2018/02/13

Interesting read [WayBack]: The mystery of the Zombie RAM | josh.com that starts with

It all started one bright morning when I wondered: Can the RAM memory on an AVR chip continue to store data after power is removed? If it can hold the data even just for a brief moment, then…

TL;DR: Always watch your uA sources. Or like Lübbe Onken puts it on G+:

In my first company, we had built a piece of hardware, which turned itself on mysteriously sometimes. We found out that this was caused by a status led that created enough current in bright sunlight.

–jeroen

via:

 

Posted in Arduino, Development, Hardware Development | Leave a Comment »

`-bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)` on fresh Raspbian on Raspberry

Posted by jpluimers on 2017/03/24

Every time I logged onto a freshly installed Rasbian system (Debian Jessie), I had this message:

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Sat Aug 27 19:52:33 2016 from 192.168.171.24
-bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
-bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
-bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)

Asking for the locale settings would give this:

jeroenp@raspberrypi:~ $ locale
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=en_GB.UTF-8
LANGUAGE=
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=en_US.UTF-8

Searching for raspbian jessie “-bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)” I found fix locale issue #15 · scaleway/image-debian@543e9b4 [WayBack] that fixes Locale issue on Debian Jessie · Issue #15 · scaleway/image-debian · GitHub [WayBack]:

When logging into to a freshly booted debian jessie image:

-bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
-bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)

Source: Locale issue on Debian Jessie · Issue #15 · scaleway/image-debian

I changed the crux of that solution to this one:

echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen && locale-gen

When running, it showed this:

# echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen && locale-gen
Generating locales (this might take a while)...
  en_GB.UTF-8... done
  en_US.UTF-8... done
Generation complete.

And logging this:

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Sat Aug 27 20:26:34 2016 from 192.168.171.24

Problem solved: 1 line of code!

–jeroen

Posted in *nix, Arduino, Debian, Development, Hardware Development, Linux, Power User, Raspberry Pi, Raspbian | 1 Comment »

KPN LoRa om Van Raam fietsen te traceren Zakelijk KPN Forum

Posted by jpluimers on 2017/03/02

Interesting: [Archive.isKPN LoRa om Van Raam fietsen te traceren Zakelijk KPN Forum via [WayBackNederlands bedrijf komt met narrowband-internet-of-things-ontwikkelbordje – Computer – Nieuws – Tweakers

–jeroen

Posted in Arduino, Development, Hardware Development, Hardware Interfacing | Leave a Comment »

DIY pick and place machine from parts of scanner, inkjet printer, DVD player and vaccuum pump – Open Theremin – Urs Gaudenz

Posted by jpluimers on 2017/01/30

Urs Gaudenz manufactures Open.Theremin kits using his do it yourself pick and place machine which he built from low cost scanner, ink jet printer, DVD player mechanics and some Arduino controlling. Even his solder oven is Arduino controlled!

This is months of work showing a work flow in a 11 minute youtube video. Well done!

via:

Video:

Read the rest of this entry »

Posted in Arduino, Development, Geeky, Hardware Development | Leave a Comment »

 
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