This device captures the IP address of your network and it publish on site DynDNS.com. All without PC. It allow a remote access to your LAN even if the IP address of the connections changes. If you don’t want to use the software provided by DynDNS, and then leave the PC switched on continuously, the solution is this project. Our device queries the site http://checkip.dyndns.com/ to know the IP currently used for the connection, and then publish your free account to www.dyndns.com instead of the computer acquired the new IP. Such a device therefore allows to locate a LAN connected to the Internet via a router or modem network. All schematics file, pcb anche arduino sketch on
Arduino DDNS (Dynamic DNS) – [Link]
Mario writes: [via]
To show the basic principal I used a remote wall socket which normally is switched with a remote via a radio frequency of 433 MHz. What I wanted was to have an Arduino controlling the remote switch to turn on/off the wall socket.
Mario started with a commercial remote wall socket normally operated by RF, and hacked it by replacing the RF controller with a 4N35 optocoupler to open and close the switch.
All that was left to do was to write an Arduino sketch that listens to the Serial port for incoming data to switch the circuit, a small desktop program which transmits the control data, and as a bonus a small Android app which sends the switching state to the desktop program. To prepare your device/remote for being switched externally, you first have to desolder the buttons. In my remote the circuit layout was pretty simple and I could desolder the buttons pretty easily.
Android / Arduino controlled remote wall socket – [Link]
Jaroslaw Lupinski designed the Senpai (Shield for Extra Nimble Programming of Arduino) shield, to make it easy to program AVR microcontrollers using an Arduino: [via]
If you want to take your device to the next level, you’ll need to program a bare AVR chip to run the code you’ve developed. If you want to build around the ATMega328 chip (the same chip that’s inside the Arduino), you can even program the bare chip with the same code as the Arduino sketch. A great sketch has been written by an Arduino user that lets you turn your Arduino into an AVR programmer. It’s great if you just need to program one chip and be done with it, but sometimes you want to develop code while a chip is socketed on a board, to program surface mount components, or to program lots of chips in a short amount of time. Using the shield I developed, you can use the ZIF socket to quickly swap out chips to be programmed (it supports 3 device families), or use the Atmel standard ICSP protocol to program chips that are already in-circuit with the ICSP header.
Program AVR microcontrollers using your Arduino and the Senpai shield – [Link]
This DIY Parking Sonsor using Arduino, ultrasonic range finder and some of components
Mike writes :
The last time I was home visiting my parents I noticed bumper imprints caused by my mother suburban on the stairs leading up from the garage. Their garage it turns out is just barely long enough to fit their gigantic vehicles. So I decided it would be nice to have some visual cue for parking. Out came the arduino and a sonar range finder from Radio Shack.
DIY Parking Sensor using Arduino – [Link]
dangerousprototypes.com writes: [via]
Maik Schmidt likes the Arduino, but like many of us he realizes the platform’s potential for advanced techniques beyond the IDE. In this article from the Pragmatic Bookshelf, he highlights the steps a beginner can take to learn how to develop software for the Arduino in a deeper way.
Starting with how the IDE turns sketches into executable code, he transitions to managing Arduino projects with a good old Makefile that you can easily integrate into your favorite IDE. In addition, he demonstrates that the Arduino platform supports nearly all features of the current C++ standard and that it’s advantageous to use these features for programming embedded systems. The message to beginners is not to abandon the Arduino as you learn advanced programming techniques, but to use that knowledge to expand Arduino’s capabilities.
Advanced Arduino hacking – [Link]
Due to the recent nRF24LE1 DangerousPrototypes blog post I like to share some Arduino/Teensy code I have written for the nRF24L01+ transceiver. ITead Studio has ready-to-use modules for just $5.98. The attached code and the modules work remarkably well.
Arduino/Teensy code for nRF24L01 transceiver – [Link]
Up until now, we have talked about working with a lot of low-power devices. Sensors, LEDs, ICs, and the like are all capable of being powered directly from your Arduino, but as many awesome 5 and 3.3v components as there are, eventually you will find yourself holding a 12v solenoid, motor, or light and wondering “How the heck am I supposed to control this from my Arduino?” Well today we are going to talk about doing just that from a magical device know as a transistor, specifically the TIP120 Darlington Transistor.
Simplified Motor Control Using A TIP120 – [Link]
I had this (wrong) idea that I could communicate with more than two Arduinos through the RX/TX ports using Serial communication. One of the issues is, (1) that it’s not possible to do so … and (2) even if it would, it would not be possible to identify the nodes in the network. Chatting on the Arduino IRC channel, I was suggested to use a protocol such as I2C or 1-Wire.
I2C Communication Between Two Arduinos – [Link]
This is another SIM900-based GSM/GPRS wireless data shield for the Arduino, this one is from Open Electronics:
This is a very low cost and simple Arduino GSM and GPRS shield. We use the module SIMCom SIM900. It’s the cheaper module now available in the market. To connect this module to Arduino I make a PCB that include a LM317 some capacitor filter and no more. I performed a GSM library to control easily the module. The GSM library is a modified version of the library of HWKitchen.
With our version we control the module throw the pin 4 and 5 (so normal digital pin) and our GSM library include also the NewSoftSerial, so you can easy control the module, send and read SMS, make call, control the GSM state ecc.
To download schematics, PCB and Library check the site
Yet another Arduino GSM shield – [Link]