Hi all! After some time out, due some hard work, I’m here again with a ‘one weekend’ project (in my case, with three childs. Sure it can be done in one afternoon!). I want to start some projects with Arduino and IoT, so the first things I need is an Arduino board, an Ethernet shield and a switch to connect it to the net. Also I need a power supply for the Arduino board, and I think that, better than a external USB AC wall adaptor or power supply, is modify the switch to add it a USB power port that can power the Arduino board. I’ve got at home a TP-Link TL-SF1008D, a simple 8 port 10/100 Mbps switch. So, let’s go to open it and add it the USB port!
A brief entry to tell you that Numato people are very happy this year, and from December 2013 and January 2014 they will give a free gift (including worlwide shipping costs) to everyone that shares this message over facebook, twitter or in a blog. Here’s all the info about this mega Give Away. From here, I only can congratulate they for this great initiative.
From Spain, I wish a Merry Christmas for everyone and I hope all of you enjoy this hollidays with your family and friends!!
I resume this brief series of articles with another device I usually use. It’s the popular 24LC256 I2C EEPROM memory, from Microchip. First of all, you can find the datasheet here. This memory has a 32K x 8 bytes of capacity (36768 bytes if you prefer), and can works between 1.7V to 5.5V, with a maximun clock frequency of 1MHz (FC model with Vcc > 2.5V). Of course, it’s compatible with the 100khz and 400khz standard speeds. Here’s a block diagram of this memory: