Raspberry Pi 3G using a Huawei E303 modem and DynDNS (English)

Long-time readers of this website might recognize this article. It was the first article, I published on nerdhut. As of today, this is still one of the most popular articles on the page and because of that, I decided to shorten it a bit and translate it to English.

However, the original German version remains online here!

Introduction

Due to my work on a remote-controlled unmanned ground vehicle, I searched for a way to control it anywhere in the world. Because I wanted it to have a high range and reliability, I decided to communicate with it over the internet, which should be available almost anywhere on the planet. Continue reading Raspberry Pi 3G using a Huawei E303 modem and DynDNS (English)

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How to use a relay module with your Raspberry Pi, BeagleBone or Arduino

Today I’ll just upload a short how to article, explaining how to use a relay module. Some time ago I bought a dirt cheap relay module for controlling high power LEDs with a Raspberry Pi on amazon. One of these modules cost about 2$ (shipping included), which is a fantastic price, so I ordered 5 modules. In this very short article I want to explain how you can use such a module in one of your projects. Continue reading How to use a relay module with your Raspberry Pi, BeagleBone or Arduino

Control a Macintosh Classic CRT with a BeagleBone Black – Intro

Almost one year ago I found an old Macintosh Classic, produced in the 1990’s in a basement. I bought it from the guy who used to own it and he told me, that he doesn’t know whether it is working or not and that it was standing there for about 20 years, so it was in a pretty bad shape. After it arrived at my apartment, I immediately plugged it in and switched it on. After the screen came on, it was pretty disappointing: It just displayed a checkerboard, which seems to be a pretty common issue with these models. This problem is caused by a variety of issues.

Continue reading Control a Macintosh Classic CRT with a BeagleBone Black – Intro

Using hardware PWM/CLK to get exact timings on a Raspberry Pi

Introduction

This might not be a common issue, that hobbyists run into when creating their projects, because usually the software PWM, offered by the raspberry pi’s RPi.GPIO-Module, is exact enough for dimming some lights or controlling dc-motors. But for real-time and time-critical applications, this is actually an issue: Continue reading Using hardware PWM/CLK to get exact timings on a Raspberry Pi

Raspberry Pi 3G mit Huawei E303 und DynDNS (Deutsch, Teil 2)

English version available here!

Einleitung

Fortsetzung von Teil 1!
In diesem Teil der Miniserie geht es nur darum, einen DynDNS Dienst auf dem Raspberry Pi einzurichten. Das ist, je nachdem welchen Dienst ihr gewählt habt, ein recht trivialer Vorgang. Ich verwende für meine Zwecke DuckDNS, ganz einfach aus dem Grund, weil das Einrichten schnell von der Hand geht und ich Enten mag.

Continue reading Raspberry Pi 3G mit Huawei E303 und DynDNS (Deutsch, Teil 2)

Raspberry Pi 3G mit Huawei E303 und DynDNS (Deutsch, Teil 1)

English version available here!

Geschichte

Für meine Arbeit an der ferngesteuerten Drohne habe ich bereits vor langer Zeit angefangen, eine einfache Möglichkeit zu suchen, diese praktisch weltweit ansprechen und steuern zu können. Da die Reichweite und Zuverlässigkeit der Kommunikation bei dem Projekt an oberster Stelle stehen, kam mir schnell die Idee, die Kommunikation über das mobile Internet laufen zu lassen. Dieses ist doch grundsätzlich überall dort verfügbar, wo Menschen Handys benutzen. Also (fast) weltweit. Continue reading Raspberry Pi 3G mit Huawei E303 und DynDNS (Deutsch, Teil 1)