5. 2. PROJECT MAIN BLOCK DIAGRAMS 2.1 Embedded web server Module As mentioned above the project will use the Ethernet so it has to understand the TCP/IP stack to function what needed from its protocols. The hardware that is used in that part: RJ45: all of us know it .it’s an ether net jack and it need to be interfaced with a small circuit that handle the deferential modulation of the ether net transmitting, for that we used a ready RJ45 module that has a build in differentiation handler circuit,this RJ45 is called BEL 0810-1xx1-03 that also has two LEDs both can be use to show the status of the network . ENC28J60 : Ether net controller that gets the frames from the Ether net and send it via an SPI interface to the responsible hardware this controller can be programmed via a SPI interface by giving it the MAC and IP addresses . this controller needs an 25 MHz crystal to operate and it gives an connection of 10 Mbps connection .but there is a problem with the ENC that is the working voltage it works on 3.3V so its outputs have to be shifted to be 0 or 1 for that we use the 74LC125 try stat