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by stratosb
Tue Dec 10, 2019 3:01 pm
Forum: Advanced users
Topic: To docker or not to docker on raspberry pi?
Replies: 1
Views: 315

To docker or not to docker on raspberry pi?

Hello everyone, Lately I am experimenting with docker and since I own a couple of raspberry pis, the question that came up to my mind was whether to use docker on the raspberry pi. For example if I want to install nodejs on the raspberry pi, I can do it simply, without the use of a docker container,...
by stratosb
Wed Aug 29, 2018 5:53 am
Forum: Automation, sensing and robotics
Topic: Robosapien responds to Raspberry Pi and LIRC
Replies: 0
Views: 332

Robosapien responds to Raspberry Pi and LIRC

Hello everyone,
a common problem with the Robosapien robot is a lost remote control.
That was the case for me too but I used the raspberry pi and LIRC to make Robosapien respond to my infrared commands.
And it works like a charm: https://youtu.be/h-H5GksE90I
by stratosb
Thu Feb 01, 2018 8:05 am
Forum: Troubleshooting
Topic: Raspberry pi problem- dim LEDs, no boot.
Replies: 4
Views: 681

Re: Raspberry pi problem- dim LEDs, no boot.

Hi again, After reading several posts, I decided to install the raspbian jessie in a sdcard and insert it in my raspberry pi 1 model B. This time the raspberry pi managed to boot successfully but the usb ports do not seem to work, the mouse and keyboard do not function at all. Therefore I thought to...
by stratosb
Sat Jan 13, 2018 9:43 pm
Forum: Troubleshooting
Topic: Raspberry pi problem- dim LEDs, no boot.
Replies: 4
Views: 681

Re: Raspberry pi problem- dim LEDs, no boot.

After reading the troubleshooting sticky, I left the raspberry pi for a week for the polyfuse to settle. This actually worked! I switched it on today and fortunately the leds look fine but I get the following error message: sh: can't access tty: job control turned off I researched through the intern...
by stratosb
Thu Jan 04, 2018 5:52 pm
Forum: Troubleshooting
Topic: Raspberry pi problem- dim LEDs, no boot.
Replies: 4
Views: 681

Raspberry pi problem- dim LEDs, no boot.

Hello all,
I have got a Raspberry pi Model B Rev 2 and I face the following problem:
When I switch it on, both the red and green leds are dim and after a while both leds switch off resulting in the raspberry pi not booting at all.
Is my raspberry pi dead?
Thank you for your help.

Regards,
Stratos
by stratosb
Fri Sep 29, 2017 10:32 am
Forum: Astro Pi
Topic: Sense Hat and greek fonts
Replies: 4
Views: 2797

Sense Hat and greek fonts

Hello,
I own a sense hat and it is not possible to display a text in greek with the command: sense.show_message("<greek text>").
Does the sense hat support the greek fonts?
Thank you.

Stratos
by stratosb
Sun Oct 30, 2016 10:12 pm
Forum: Beginners
Topic: Model A
Replies: 4
Views: 894

Re: Model A

Thank you both for your replies.
Actually I tried a 8GB sd card with raspbian installed, but it was very slow to start up the OS.
Is this because model A has 256MB RAM?
Thank you again.
by stratosb
Sun Oct 30, 2016 9:56 pm
Forum: Beginners
Topic: Model A
Replies: 4
Views: 894

Model A

Hello all,
I was given a raspberry pi model A.
Which version of raspbian do I need to download? Is raspbian from "https://www.raspberrypi.org/downloads/" ok?
What type of sd card do I need to buy and at what size?
Thank you.
by stratosb
Mon Apr 11, 2016 11:27 am
Forum: Automation, sensing and robotics
Topic: How to drive two stepper motors simultaneously
Replies: 2
Views: 1157

How to drive two stepper motors simultaneously

Hello, I am using a raspberry pi model B to drive one stepper motor with the L293D chip and python. Now I would like to control two stepper motors simultaneously with two different L293D chips and python. I have read that this can be done with python threading but it is very difficult. Is there anot...
by stratosb
Fri May 08, 2015 12:44 pm
Forum: Automation, sensing and robotics
Topic: 2-D printing with raspbery pi
Replies: 6
Views: 948

Re: 2-D printing with raspbery pi

Thank you.
What about the software to display an image or text before sending it for plotting?
by stratosb
Fri May 08, 2015 12:21 pm
Forum: Automation, sensing and robotics
Topic: 2-D printing with raspbery pi
Replies: 6
Views: 948

Re: 2-D printing with raspbery pi

I have checked out your link before and read this: http://www.homofaciens.de/technics-mach ... navion.htm
but it does not contain many details on the "translation" being done from an image or text to the exact movements of the stepper motors in order to print.
by stratosb
Fri May 08, 2015 12:16 pm
Forum: Automation, sensing and robotics
Topic: 2-D printing with raspbery pi
Replies: 6
Views: 948

Re: 2-D printing with raspbery pi

Yes I mean more of a plotter.
by stratosb
Fri May 08, 2015 11:38 am
Forum: Automation, sensing and robotics
Topic: 2-D printing with raspbery pi
Replies: 6
Views: 948

2-D printing with raspbery pi

Hello, I would like to learn more on making a 2-D printer with raspberry pi. I know that I need to use stepper motors and h-bridge motor drivers for my task. However I need some guidance on the following questions: 1. What software do I need to use for uploading an image or writing a text before sen...
by stratosb
Mon Jan 19, 2015 8:59 am
Forum: Automation, sensing and robotics
Topic: IR transmitter sends signal only once
Replies: 4
Views: 1036

Re: IR transmitter sends signal only once

Hello again, yesterday, after some time, I tried to send the same command to my Samsung TV: irsend SEND_ONCE myTV key_power Although I am able to switch on the TV, I cannot switch it off with the same command as I used to do. Also the commands for the "volume up", "volume down", "channel up", "chann...
by stratosb
Wed Dec 24, 2014 9:09 am
Forum: Automation, sensing and robotics
Topic: Send Lirc IR signal from android
Replies: 1
Views: 1160

Send Lirc IR signal from android

Hello, I have set up my raspberry pi to use it like a remote control for my Samsung TV. I issue the following command through the raspberry pi command shell in order to switch my TV on and works fine: irsend SEND_ONCE myTV key_power Now I would like to issue the same command from my Android device. ...
by stratosb
Tue Dec 23, 2014 9:32 pm
Forum: Automation, sensing and robotics
Topic: IR transmitter sends signal only once
Replies: 4
Views: 1036

Re: IR transmitter sends signal only once

Hi Ale,
it did work, thank you very much for your help
by stratosb
Mon Dec 22, 2014 1:28 pm
Forum: Automation, sensing and robotics
Topic: IR transmitter sends signal only once
Replies: 4
Views: 1036

Re: IR transmitter sends signal only once

Hi Ale and Greetings from Greece, Athens!
I will try out your solution and let you know.
Thank you.

Stratos
by stratosb
Mon Dec 22, 2014 10:30 am
Forum: Automation, sensing and robotics
Topic: IR transmitter sends signal only once
Replies: 4
Views: 1036

IR transmitter sends signal only once

Hello, I have set up my raspberry pi to use it like a remote control for my Samsung TV. I issue the following command through the raspberry pi in order to switch my TV on and works fine: irsend SEND_ONCE myTV key_power However if I send the same command, the TV does not switch off. The same happens ...

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