Collaborate Disseminate
There is a gotcha lurking in wait for hackers who look at a piece of equipment, see a port labeled “Serial / RS-232”, and start to get ideas. The issue …read more Continue reading DIY Wireless Serial Adapter Speaks (True) RS-232
For years, one of the most accessible and simplest-to-implement methods of talking to a dev board has been to give it a serial port. Almost everything has serial in some …read more Continue reading WebSerial: Browser Based Development For Your Boards and Electronic Badges
1987 was a glorious year. It brought us the PS/2 keyboard standard that’s still present on many a motherboard back panel to this day. (It also marked the North America/Europe release of The Legend of Zelda but that’s another article.) …read more
Continue reading Decoding the PS/2 Keyboard Protocol Using Good Old Fashioned Hardware
Serial ports used to be everywhere. In a way, they still are since many things that appear to plug in as a USB device actually look like a serial port. The problem is that today, the world runs on the …read more
Note that 00 in 00.pem is the serial number of the certificate.
When I run this command, it also creates a file called 00.pem in the new certs directory.
The 00.pem has the same content as enduser-example.com.crt.
Here is the command:
open… Continue reading When I run this command in OpenSSL, it also creates a file called `serial_number.pem`
Can two different Root certificates and their intermediate certs have the same serial number?
I issue two root certificates:
Organization: My Example Organization:
My Example Organization Root Certificate Authority (serial number is 00)
-… Continue reading Can two different Root certificates have the same serial number?
Every hacker has an assortment of USB to TTL-serial adapters kicking around in their lab, and we have all been annoyed that each one has a different pinout. You layout a PCB or breadboard for the Sparkfun flavor (GND, CTS, VCC, TXD, RXD, DTR), but when you begin troubleshooting all …read more
The humble standalone serial terminal might be long gone from the collective computing experience, but in the ghostly form of a software virtual terminal and a serial converter it remains the most basic fall-back and essential tool of the computer hardware hacker. [Mitsuru Yamada] has created the product that should …read more
Continue reading A Portable Serial Terminal That Should Be From The 1970s
I want to sell online some of the electronic stuff that I don’t need anymore, such as my ASUS Wi-Fi router, and I’m wondering when I upload photos of it should I leave its serial number, MAC address, and pin code written on the back of the… Continue reading Should or shouldn’t I show a serial number, MAC address and other product ID when I sell it online?
Pity the poor TTL computer aficionado. It’s an obsession, really — using discrete logic chips to scratch-build a computer that would probably compare unfavorably to an 80s era 8-bit machine in terms of performance. And yet they still forge ahead with their breadboards full of chips and tangles of wire. …read more
Continue reading Discrete-Logic UART Keeps 8-Bit TTL Computer Connected