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My solution to the Reverse-Engineering Contest IV Week 2 Followup challenge
www.flickr.com/photos/ltdemartinet/16773339758/
See my blog at www.brickpile.com
The "globe" rotates freely on string; part of the mechanism which pulls it into shape, about 8" (20 cm) diameter.
Auguste Kerckhoffs postulated his eponymous principle back in the 19th century: "A cryptosystem should be secure even if everything about the system, except for the key, is public knowledge". This means that an effective cryptographic method does not have to be kept secret. If it were, you should wonder why.
Wibu-Systems has been true to this principle for several years. Blurry Box cryptography offers software protection that is completely based on publicly available methods and that can thus be assessed and compared. Blurry Box makes it so hard to counterfeit the software that it would be easier and faster to re-develop the application from scratch! www.wibu.com/protection-suite/blurry-box-cryptography.html.
To test the validity and strength of the newly patented encryption method Blurry Box, now integrated with the anti-debug and obfuscation methods of CodeMeter, Wibu-Systems launched a contest, open to all hackers around the globe. None of the 315 international participants managed to send in a full crack of the encryption scheme. www.blurrybox.com.
Contact our encryption specialists to see which software protection solution works best for you: www.wibu.com/bb.
This is the only circuit board in the keyboard. It's about 7x4 cm. It effectively has nothing on it except the BCM2042 keyboard/mouse module.
The top membrane layer connects to the right connector, and the bottom layer to the left.
The spec sheet claims >109dB A-weighted dynamic range, while the CS4272 claims 114 dB dynamic range and 100 dB THD+N.
The blue LED was keeping me up at night (as tends to happen with blue LEDs in consumer products these days), so I dimmed it by increasing the resistance in series with it while I had the thing open. I replaced the blinding 1 kΩ resistor with a 10 kΩ.
You can also see the redundant wires on the headphone jack, so that if the solder joints on the board break again, there's still a wire connecting them and I won't have to take it apart again.
I became curious whether I could reverse-engineer and recreate the IR signal that my ST-E2 wireless flash transmitter produces. So, I put a photosensor on my roommate's oscilliscope to see what I could find.
His scope isn't quite up to the job. It's an older analog scope, with no memory. So I ended up setting up my camera in front of it to try and record the trace. Here's the result. I tried a bunch of different settings, but there's still more experimenting to be done. Each successful capture takes about 5 tries, to get everything aligned right. The scope here is set to 0.5V/div (not zeroed vertically), and 1ms/div. The photosensor pulls low when it sees light.
Looks to me like pulse modulation, something like 64 bits, 10KHz. Of course, it has to be pulse modulation; the transmitter transmits by firing a little flashbulb. I think I might have enough here to recreate at least the signal for the pilot button. Tomorrow.
Here is a very silly solution to the Reverse Engineering 3's week 7 tie-break. I am sorry the contest is ending and so I've kept looking for more solutions to this challenge.
The red and green units are each made up of a 2x2 plate and six 1x1 plates w/ vertical clip. The arrangement of the 1x1 plates w/ clip is slightly different: in the green they go around clockwise, on the red they go counterclockwise.
They clip onto the side tiles and hold them fairy securely. There is one tile on each side that only has one clip holding it. This means there is a bit of fiddling to make sure it is straight. However, it is stable.
This would be acceptable as a solution, but the other two I made are slightly stronger and require less fiddling to make sure it is all straight. I just thought I'd share this 'cause I thought it was cool.
Printed on Epson 1280 and cut on Craft ROBO. You need two. Die is 7" (18 cm). Note crop marks that, after printing, are "read" by the ROBO to perfectly cut the printed shape without any need for bleed!
This is a reverse-engineering.
All credits goes to Mike Nieves
Link to original model: www.flickr.com/photos/retinence/29637123897/in/photostream/
Reverse engineering services to replace worn-out mechanical machinery, industrial and plant equipment through 3D CAD modeling from laser-scanned images. For more information visit: bit.ly/3jlmLga
My solution to the Reverse-Engineering Contest IV Week 5 Followup C challenge
www.flickr.com/photos/ltdemartinet/16279415924/
See my blog at www.brickpile.com
Only pins 1 2 4 6 10 13 15 16 18 19 20 30 are used.
ipl.derpapst.eu/wiki/Dock_Connector#Dock_Connector_Pin_Out
The numbers are pretty much useless for identifying the components. :(
www.ifixit.com/Teardown/iPad-Camera-Connection-Kit-SD-Car...
After briefly thinking of a travis brick with 2555s on it (too wide) I thought of the Technic capstan (48723). Also too wide, I thought.
So what else can connect things around the edge and has a rod-sized hole in the center? Ah, those disk-things from the Exo Force shooters (53993). Add a bit of flex tube (cut to 13mm), and voila!
Thinking on this took me 1/2 hour. Trying to find #53993 in any Lego CAD took another couple hours (including download and install of LDD). -- It's not in any of them. SO THEN, another couple hours of trying to find the pieces to see if my grand theory actually worked (including much gruschteling through my misc rod & clip drawer for the square signs, and then looking it up on BrickLink to see what sets have it, then plundering them from sets - two unopened.
So here it is with all three of my square road signs, one of my many disks, and an uncut flex tube (because there was no point without 3 more signs - plus I hate to do that.)
This is a reverse-engineering.
All credits goes to Mike Nieves
Link to original model: www.flickr.com/photos/retinence/43949178682/in/photostream/
This is a reverse-engineering.
All credits goes to
Tyler Clites
Link to original model: www.flickr.com/photos/legohaulic/49818199421/in/photostream/
This is a reverse-engineering.
All credits goes to
Tyler Clites
Link to original model: www.flickr.com/photos/legohaulic/49874747658/in/photostream/
This is a reverse-engineering.
Made in 2015
All credits goes to Nicolas PICOT
Link to original model: www.flickr.com/photos/icare-lego-fan/16279490427/in/faves...
This is reverse-engineering.
All credits goes to Mike Nieves
Link to original model: www.flickr.com/photos/retinence/31335395217/in/photostream/
This is the original inside submitted. I saw three others with the same inside, and around a half-dozen others with the same idea, but with different brackets.
The technic brick with pin-stud is equivalent to the 1x1 with stud on one side. (If I recall correctly, I left these in from a previous tablescrap I modified where the "LEGO" on the stud would have made an illegal build.)
This is a reverse-engineering.
All credits goes to
Tyler Clites
Link to original model: www.flickr.com/photos/legohaulic/49874747658/in/photostream/