https://www.raspberrypi.org/learning/networking-lessons/lesson-4/plan/ Lesson 4 - Domain Name System (DNS) Introduction It is recommended that all students complete the previous DHCP lesson before attempting this. It is important to complete the lessons in this order because understanding DNS requires the understanding of its relationship to DHCP. Please note that DNS is a fairly complex subject and this … Continue reading Domain Name System (DNS)
Author: Eric
Dynamic Host Configuration Protocol (DHCP) on Raspberry Pi
https://www.raspberrypi.org/learning/networking-lessons/lesson-3/plan/ In this lesson, students will learn how the Raspberry Pi can be used to demonstrate Dynamic Host Configuration Protocol on an isolated network. By now it will be clear that repeatedly changing the /etc/network/interfaces file is time-consuming and laborious. There are a number of disadvantages to giving static IP addresses to all computers on … Continue reading Dynamic Host Configuration Protocol (DHCP) on Raspberry Pi
Scan available wifi access points on Ubuntu
Turn on the interface and scan all available WiFi networks sudo ifconfig wlan0 up sudo iwlist wlan0 scan Anther way to turn up and off wifi interface (ifdown will release the existing IP address to the DHCP server; ifup will get another IP address from the DHCP server) sudo ifdown wlan0 sudo ifup wlan0 A … Continue reading Scan available wifi access points on Ubuntu
Configure Raspberry Pi 3 as a WiFi Access Point (AP)
The tutorial below is for Raspberry Pi 3 ONLY. One of my thoughts was, can I use it as a SoftAP for some ESP8266 sensor nodes? As it turns out, you can, and it's not that difficult, as the BCM43438 chip is supported by the open-source brcmfmac driver! Packages The first step is to install … Continue reading Configure Raspberry Pi 3 as a WiFi Access Point (AP)
How to enable or disable service/Daemon on Ubuntu?
There are services that can be enabled/disabled using the GUI (like the startup application) or the terminal. For the Terminal you have several options. First, open a terminal (Type "terminal" in the dash, for example, and open it). Then: Temporary enabling/disabling services To stop and start services temporarily (Does not enable / disable them for … Continue reading How to enable or disable service/Daemon on Ubuntu?
Where to store wireless credential on Raspbian
/etc/wpa_supplicant/wpa_supplicant.conf ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev update_config=1 network={ ssid="wireless ID" psk="myPassword" key_mgmt=WPA-PSK } network={ ssid="wireless ID" psk="myPassword" key_mgmt=WPA-PSK }
Ruby on Rails in Machine Learning – Yay or Nay?
Machine Learning is a trending field of Computer Science turning computer’s computations into a new level and giving a number of unique opportunities. It’s getting more and more popular, and it’s common for modern web application as well as services, such as Netflix, Spotify, Amazon.com and Facebook. Machine Learning is a good solution for apps … Continue reading Ruby on Rails in Machine Learning – Yay or Nay?
Class-D amplifier
A class-D amplifier or switching amplifier is an electronic amplifierin which the amplifying devices (transistors, usually MOSFETs) operate as electronic switches, and not as linear gain devices as in other amplifiers. They are rapidly switching back and forth between the supply rails, being fed by a modulator using pulse width, pulse density, or related techniques to encode the audio input into … Continue reading Class-D amplifier
Pebble’s founder is back on Kickstarter with an iPhone battery case that also charges AirPods
Pebble’s founder and former CEO Eric Migicovsky is back with his first new product since the smartwatch maker got rolled up into Fitbit last year. The PodCase doesn’t have the same sort of grand ambitions as his last project, but the new case is the kind of clever one-off product Kickstarter was designed to deliver. … Continue reading Pebble’s founder is back on Kickstarter with an iPhone battery case that also charges AirPods
Kickstarter’s most successful fundraiser shares lessons from a failed campaign
PodCase’s search for $300,000 on Kickstarter has ended — not with a bang but a whimper. Earlier this week, the company posted an update to its page, explaining that it would not be continuing the campaign after having pulled in less than a tenth of its goal, with around three days left. “As I’m sure … Continue reading Kickstarter’s most successful fundraiser shares lessons from a failed campaign
