A continuation of one of my previous projects. http://www.ragingcomputer.com/2012/06/rimage-dtp-4500-ras-13-initialization-sequence
Each command starts with the nonprintable ascii character ESC (x1B) and ends with a capital C.
Each reply starts with the nonprintable ascii character ESC (x1B) and ends with EOT (x04). Since that looks pretty ugly in a terminal, I replace ESC with a + sign and the EOT with an = sign.
In the known command list, the commands aren’t indented and the known replies are indented.
I smacked together a little bit of perl to verify I was understanding the commands correctly.
Continue reading “Rimage DTP-4500 RAS 13 Serial Control Commands”
I was lookin to set up some digital signage, nothing too fancy, basically a scaled up digital picture frame with a few extra features. It’s also important that it works well stand-alone.
This is what I came up with
Continue reading “Digital Signage Kiosk With Video”
One of the drawbacks of living outside of city limits in Iowa… Internet connectivity is an issue. Century Link (formerly Qwest) is the telco for the area and our ISP. The service has never been stable, or even close. If good fortune was smiling upon us, it would stay connected for 6 hours or so. I think it was more normal to get 15-90 minutes of internets at a time. A tech did look at our connection, and things have improved, but it’s still not great.
I wanted to test the house wiring before blaming the ISP or the house. Luckily CenturyLink has a support page on exactly this topic. http://qwest.centurylink.com/internethelp/wired-dmarc.html
Unplugged the house and plugged directly into the line feeding the house.
Continue reading “DSL Woes”
A couple years ago, my girlfriend wanted to make some ice cream. I didn’t have anything going on, so of course I was up for this.
We went to Wal-Mart and got a Rival FRRVCB40-BL. It seems to work pretty well, especially for only being $25. I mostly go by the recipe in the manual, but I don’t like it that rich, so I tweaked it a bit.Continue reading “Making Ice Cream”
This was a quick hack with some perl to chop up the logs and spit out the results I wanted.
This is not normally something I would share, but I want to be able to find it again, should I have a need for it. The first one replaces the non-printable characters and separates the transmit and receive lines to improve printed readability.Continue reading “Beyond Logic Serial Analyser Log Printing”
Initialization sequence for Rimage RTP-4500 RAS 13 autoloader duplicator robot.
Serial sniffing with Beyond Logic RS-232 Protocol Analyser in ASCII mode.
For interception, I made a cable with 2 8-pin mini din connectors wired straight through after patching through a solderless breadboard. Connection to PC is 38400-8-N-1 using hardware flow control. I will post pinout and diagram later. For now, Pictures of the hardware and connections. Rimage Serial Sniffing – Second Attempt
Video recorded using Blueberry software BB FlashBack Express.
Logged output from the rs232 protocol analyser has been reformatted with a bit of perl to make reading easier. I chose 80 chars for the column width because it matches what the protocol analyser displays in the video. Each line is broken into two lines. The first line is what’s sent from the computer/printer to the autoloader. The second line is the response. To make things printable, I replaced the ASCII ESC character (hex x1B) with a plus + symbol and the ASCII EOT character (hex x04) with an = symbol.
So far, it seems all commands and replies start with ESC! and all replies end with EOT. Log file from initialization follows.Continue reading “Rimage DTP-4500 RAS 13 Initialization Sequence”
I wanted to be able to locate wifi signals, so I built a directional antenna and strapped it onto my panorama robot. The waveguide style antenna built from a used can (explains the name cantenna) looked to be the easiest to build. I bought a pigtail with an N male connector to RP-SMA male connector. I plugged this into my Alfa Network AWUS036NH. I then fired up inSSIDer and used PuTTY to control the Arduino sketch and aim the antenna.
The signal strength was not what I expected to see at all. I assumed this antenna was directional and would be strongest when I pointed it directly at the AP. It was strongest pointing at about a 45 degree angle to the left of the access point. I’m a complete n00b when it comes to RF, so any feedback on why I’m not seeing what i expected for results would be greatly appreciated.
Note: Will update post if/when I have an answer.
I am a complete n00b when it comes to build antennas. I goobered another can on there and it works a lot better. I have to give a great thanks to several redditors for pointing me in the right direction. I’m always impressed with how helpful people are. http://www.reddit.com/r/electronics/comments/tmtbi/attempting_wifi_direction_finding_with_a_cantenna/ Even better, I’ve got some reading to do now.
I’ve included links I found useful or interesting and more pictures.
Continue reading “Arduino Robotic Directional Wifi Scanning”
Someone at work broke a sandisk cruzer micro flash drive. It was really broken. It ripped the pads off the PCB.
Of course it had the only copy of the data on it.
The power and ground traces were pretty easy to trace and solder onto alternate pads. I didn’t bother to take pics of that. The traces from the USB plug D+ and D- went directly to the tiny chip on the top of the board, as you can see in the second picture. Solder mask is pretty tough so I figured the pins of this chip would be the easiest place to connect.
I used 30 gauge magnet wire to make the connections. It didn’t have to last long, just long enough to transfer data off, so I just held wires in place with masking tape. I didn’t have a spare USB connector, so I rigged up the broken one on a piece of perfboard.
I was able to recover all the data.
Continue reading “Flash drive repair”
I recently made my first PCB with toner transfer using an iron. It was pretty ugly.
I bought a cheap-o laminator from walmart for $25 + tax. It’s a Scotch TL901. I used masking tape to hold things in place. It worked well enough that I’m not going to complain.
I never realized what a difference a laminator makes! It’s hard to mess up now. I also tried using parchment paper.
The results are so much better with parchment paper and a laminator than proper transfer paper and an iron. At the end I have a pic of transfer using transfer paper. The edges are a lot more crisp, but it costs quite a bit more.
Toner transfer with parchment paper
Scotch TL901 Thermal Laminator
Continue reading “Toner Transfer on the Cheap”
First things first, a picture demonstrating success.
And a video!
Next, a link to the resources I needed http://www.ragingcomputer.com/2012/04/arduino-shield-etching-thoughts
After that, pictures. Lots of pictures.Continue reading “From n00b to Etching an Arduino Shield”