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1  Using Arduino / Programming Questions / Re: calcul big numbers on: March 05, 2013, 11:24:01 am
thanks! sounds interesting but is there any explanation somewhere?
2  Products / Arduino Due / Re: ASYMMETRIC ENCRYPTION ARDUINO DUE on: March 05, 2013, 11:16:18 am
Ok so i need to create the library from their documents?

and i saw that library yesterday but their not talking about rsa here..

http://avrcryptolib.das-labor.org/trac/wiki/BlockCiphers
3  Using Arduino / Programming Questions / calcul big numbers on: March 05, 2013, 10:02:29 am
Hi everybody, how can i store big numbers (more than 32 bit or 64 bit)

i have to use the pow() function but when i calculate big numbers (over 32 bit) i cannot store the result!.

thanks!
4  Products / Arduino Due / ASYMMETRIC ENCRYPTION ARDUINO DUE on: March 05, 2013, 09:58:13 am
Hi everybody!

I got a question here! Is there any library to make ASYMMETRIC ENCRYPTION,

PLEASE DONT TELL ME TO GOOGLE IT, i search for hours. everything i found was a topic about a guy who tell he made a aes and rsa library for arduino, but he never mentionned the link to download it..I found thing about crypto suite but is seems to be symmetric encryption.

The thing is that i create a symmetric encryption algorythm but i need to send the key throught the internet. So i need asymmetric encryption to send these data first.

THANKS!
5  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet shield w5100 problem on: March 01, 2013, 08:47:19 am
ok i've found the solution! The problem was that no gateway and subnet ip was in the sketchm, i added it and the sketch works, PERFECTLY!

Thank you for your anwser you make me learn about ARP traffic too!
6  Using Arduino / Networking, Protocols, and Devices / Re: Sharing compiled code? on: February 28, 2013, 06:54:33 pm
You should probably do that with the .hex (it's the hex code of the microcontroller) But not sure how can you upload the code with the Arduino IDE once  other people got the .hex file..
7  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet shield w5100 problem on: February 28, 2013, 06:52:22 pm
And i try 3 arduino..2 uno..one due..i tried two ethernet shield..and the same problem with every combinaison. I didn't modify the program, only the port and ip for test purpose..My router is set to forward traffic on the good ip, with the good port!

Maybe it's arp traffic..but...what can i try now?

thanks
8  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet shield w5100 problem on: February 28, 2013, 06:49:53 pm
Yeah i read about ARP traffic. Maybe it's that but only the RX led flash so..if it's ARP it is supposed to send a anwser so the TX would normally flash!??
9  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet shield w5100 problem on: February 28, 2013, 07:23:43 am
yes my touter support udp packet forwarding. its a cisco linksys e3200. and its not arp traffic because the rx led flash when i press enter on the udp tool on my computer. the led flash as i send the packet. like when you send data through the serial port. the tool is udp test tool.

thanks
10  Using Arduino / Networking, Protocols, and Devices / Ethernet shield w5100 problem on: February 27, 2013, 06:35:32 pm
Hello everybody! i got a little problem with my ethernet shield. The thing is that my shield can easily read RX data coming from  my LAN, ex: 100.100.100.113 (computer) send data to my arduino at 100.100.100.118 on port 2222. Everything works perfectly here. but the thing is that if i send data through internet to my ip. ex: xxx.xxx.xxx.95 on port 2222..my ethernet RX led flash but data aren't appearing on the Serial terminal.

Now you will think! oh this dumbass doesn't make any port forwarding! But yess i do!  The RX LED flash but nothing appear on my serial terminal. I am using the UDPSendreceiveString sketch and send data through a computer with UDP packet software.

I don't know what to do. I was able to do that some times ago..

I try the sketch with pachube.com and data are coming in! But it's tcp. So tcp work but not UDP in RX with data coming through internet and in local network it works!

Please help me!!

Thank you!
11  Using Arduino / General Electronics / Re: make a ttl cpu or a cmos? on: January 08, 2013, 04:27:46 pm
Nice for the 74181 chip! I ordered two of these! Thanks smiley
12  Using Arduino / General Electronics / Re: make a ttl cpu or a cmos? on: January 07, 2013, 07:14:17 pm
Ok nice for you anwser everybody! Some anwser bring me to learn nore about cmos technology..and i realised learn that memory cells today were made from cmos gates because of the power consumption. So i found on the web cmos sram chip that cost only a couple bucks and the greastest thing is that most of them are ttl compatible. That is really nice! Many chip today are made of cmos and ttl. Because ttl is faster and cheaper ill probably use them for logic..

Now that i will use cmos sram..ill save power consumption and save money and space and i'll will have more memory smiley

There are few ttl sram ttl chip on the market and they get a 4 bit scale data bus.

If someine is interest in a cpu project tell me i would really love to create a community to share design and idea with people interest in it!

(And sorry for my english i am from quebec i my native language is french. :p
13  Using Arduino / General Electronics / Re: make a ttl cpu or a cmos? on: January 06, 2013, 11:08:11 pm
I understand the fact that cmos is the modern standard of the industry..but for a little mcu made with a bunch of ic i really look pricing first. Power consumption is not a big problem because i will use a constant piwer source..

The only thing thag i dont like on ttl chip is the voltage drop..with many chip i dont know if it will drop enough to end with a high level signal to a low..between 2 volt (2 volt is the min high level for 74lsxx series, that i wasplanning to use).

Thanks everybody!
14  Using Arduino / General Electronics / Re: make a ttl cpu or a cmos? on: January 03, 2013, 02:46:01 pm
I think i will use those cmos 4 bit memory ic! They have a low price and contain much more memory! Lol
15  Using Arduino / General Electronics / make a ttl cpu or a cmos? on: January 03, 2013, 02:37:26 pm
Hello guys! I'm working on a project and i need a little help to developp my idea! I want to make a homemade cpu only made of transistor and logic gates!

I know it's a bit complex but with reference and tutorial i will probably succeed. But my big question..do i use ttl chip or cmos one..i found that ttl chip a very very cheaper..but i little bit more complex to get to work( i'm talking about transistor, not logic gate). Because i'm working on the SRAM of the unit and i know power comsumption is less with cmos than ttl.

I want to create NAND memory ram..but with cmos i need 16 transistor  to create one bit and with ttl i need 4 ttransistor but more resistor...

I really think i will go with ttl logic gate..and not ttl transistor or mosfet..

What do you think?
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