This is an Arduino-Based Stereo Audio switch which can be controlled over a LAN using a web browser.
Peter at solderintheveins.co.uk writes:
Use a 5v DPDT relay, a few 3.5mm stereo sockets and an Ethernet-capable Arduino to create a simple audio switch which would allow me to switch one audio source (my PC’s Soundcard in this case) to one of two outputs (headphones or speakers) via a web interface running on the Arduino from the comfort of my web browser.
Simple LAN Controlled Stereo Audio Switch - [Link]
After a couple of years of prototypes, tests and announcements, finally we have produced an ethernet shield for Arduino. This module gives Arduino the ability to open connections to other Internet hosts or behave like a server, for example a simple web server. We like this design because it uses the w5100 chip from WizNet that implements the whole IP stack in itself providing up to 4 sockets simultaneously. I believe this will provide Arduino enthusiasts around the world with a platfrom that is initially simple to use but with room for growth as the knowledge of the user increases. From the Internet of Things to the Internet of Arduinos, happy tinkering. [via]
New Arduino ethernet shield – [Link]
The Nixie Clock uses the Make Controller’s Ethernet capabilities to go online and check what the time is, via a protocol called NTP (Network Time Protocol). Once it determines the current time, it uses the digital outs on the Make Controller to communicate with a pair of custom circuit boards that drives the nixies and updates the time. [via]
Nixie Clock – [Link]
The need for Security systems have rapidly grown from being specialized for high-risk areas (like banks, companies , governmental institutions), to be available and demanded rapidly by the average public. In the last ten years, small businesses have rapidly grown and expanded and the need of reliable, cheap and effective security system is becoming a must ,not only for the business owners ,but also at homes . One of the offered way of security systems offer the SMS notification service , nice but not that reliable . SMS center could have a congestion at the time the thief was sleeping in your company (or home) borders . Well another method of creating a security system and which would be very effective is to use the Internet or Ethernet Notification system . It is reliable, when using TCP, and effective where most internet services are always on demand and it is very rare , and very unlikely to have a sudden failure.
Ethernet based Security System - [Link]
If you want to run simple webserver on embedded platform and have plenty of controllable interfaces you should consider on building or purchasing etherrape – AVR enabled Ethernet board.
This fancy board almost doesn’t have SMD elements and can be soldered by anyone with moderate soldering skills. Despite the fact that Atmega644 is interfaced with ENC28J60 Stand-alone Ethernet Controller with SPI connectivity, it also has a list of other valuable built in interfaces:
- Ethernet and TCP/IP
- Simple webserver;
- Linux command line tool;
- RS485/422 (half- /fullduplex);
- Dallas 1wire bus;
- Infra-red Receiver and Transmitter for RC5 Codec;
- MCA-25 Handy-Camera with VGA resolution can be attached (approx 10 Euro on ebay), not yet supported by firmware;
- 2MB Data-Flash memory;
Lots of great thing can be done with all these board abilities including webserver, Ethernet converter to RS232, RS485, 1-wire, infra-red, I2C, SPI interfaces. So it can serve as remotely controlled platform or data acquisition board where all readings can be seen on web screen. Project files and firmware can be downloaded from project page. [via]
AVR based multipurpose ethernet board - [Link]
Here is what the author is saying about Etherrape:
With this project, we’ll be creating hard- and software for enabling ethernet on an Atmel microcontroller. fd0 first built a prototype of it on lochraster and then made a fully-featured PCB afterwards, which will be sold as a construction set later on. Everyone with moderate soldering skills will be able to build this device. Only two SMD-devices are used (One is optional – And yes, that’s a feature!).
At first we only had the design-target to create an ethernet-enabled microcontroller platform. But then we thought of all the great things that could be done with such a device and therefore added a lot of different interfaces and hardware. Today, the following features are either built-in or easily available:
- Ethernet and TCP/IP
- Simple webserver
- Linux command line tool
- RS485/422 (half- /fullduplex)
- Dalls 1wire bus
- Infrared Receiver and Transmitter for RC5 Codec, firmware extension necessary for other codecs
- MCA-25 Handy-Camera with VGA resolution can be attached (approx 10 Euro on ebay), not yet supported by firmware
- 2MB Data-Flash memory
ELV (www.elv.de) and Conrad (www.conrad.de) offer RF-Controlled devices like powerswitches, dimmers, movement detectors, temperature-sensors and many more. All these devices belong to the FS20 series, which ensures ineropability. By attaching RF Modules to the etherrape (sender and/or receiver module), it becomes a fully fledged member of the FS20-system an can control all devices.
We offer a housing with a fully prepared front panel (see pictures below).
The housing offers space for an additional 80×100mm PCB to accomodate your selfmade extensions.
Etherrape – ethernet enabled Atmel microcontroller project – [Link]
This is a weather station with a build-in webserver. The system is modular design you can either build a pure Ethernet weather station or an Ethenet weather station with an additional local LCD display.The weather station has two temperature sensors(LM335) and one MPX4115A which an absolute air pressure sensor from Motorola/Freescale both sensors controled by atmega88/168.
Data Acquisition System - [Link]
Dingolishious tipped us off to a cheap way to receive power outage notifications, as well as remotely power-cycle electronics.
Our remote wireless site keep being unplugged or having the circuit trip from some combination of cleaning devices. I took a spare UPS and asked if we could get a $200 SNMP card for it so we would know when the power was off. Boss asked me if we could do it for less.
My solution: $70 IP Power 9200 delux. The IP Delux has 4 voltage input sensors, 4 current sensors and 8 web controlled switches. There is a 5v wall wart plugged into the switched part of the UPS running to a input. When the power goes out the ups kicks in running the POE and the wall wart turns off pin 1 on the IP Delux which sends me an email.
The added bonus is that the POE is now switched so if a AP on one wireless segment locks up I can go in one of the others and power cycle the POE remotely. IP Delux even hosts WAP so I could do it from the cheapest of cell phone web browsers.
I like the idea, and it’s a cheap way to monitor power status with a bottom-end UPS. Take a normal “wall wart” 5vDC adapter, plug it into an outlet, and the 5 volt output raises and lowers the input logic pin on the IP Power or your own homebrew monitoring electronics.
Make a power outage sensor and reboot devices remotely - [Link]