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25 items tagged "signal"
Related tags:
hacks [+],
signal code [+],
service vulnerability [+],
kernel [+],
print [+],
local information [+],
information disclosure vulnerability [+],
tool [+],
signal generator [+],
microcontrollers [+],
generator [+],
ac signal [+],
Wireless [+],
wireless signal [+],
waterfall [+],
visualizer [+],
visualization tool [+],
video [+],
usb joystick [+],
us patent application [+],
tone generator [+],
thomas pfeifer [+],
summit [+],
sultan qaboos university [+],
spectrum analyzer [+],
spectrum [+],
signal generators [+],
sided pcb [+],
security works [+],
security [+],
room quality [+],
room [+],
radio [+],
quality [+],
protocol [+],
proper signal [+],
probe [+],
pc. he [+],
opamp [+],
morse code signal [+],
morse code [+],
monitor [+],
model aircrafts [+],
model [+],
microphone [+],
machine [+],
logic function [+],
logic [+],
leigh [+],
laundry machine [+],
laundry [+],
jammed [+],
ir detector [+],
interpreter [+],
home automation system [+],
home [+],
heart rate monitor [+],
handhelds [+],
ham [+],
function generators [+],
function [+],
frank [+],
fingertip [+],
engineering [+],
diy [+],
digital [+],
didj [+],
design upgrades [+],
debraj [+],
control hardware [+],
classmates [+],
cascata [+],
capability [+],
canada [+],
cable side [+],
c ppm [+],
avr [+],
audio [+],
audacity [+],
atmega8 [+],
arpad [+],
arduino [+],
analyzer [+],
analog signal [+],
aircraft [+],
Support [+],
General [+],
BackTrack [+],
linux kernel [+],
linux [+]
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16:01
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Hack a Day
[Sulaiman Habsi] and two classmates put together a Morse Code interpreter as a class project at Sultan Qaboos University. The system listens to a morse code signal using a microphone, then translates that input to text which is displayed on this character LCD. The breadboarded circuit feeds an audio signal from the microphone, through an OpAmp, [...]
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11:01
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Hack a Day
It seems that [Limpkin] was up to no good this weekend. He decided to snoop around inside a smart-card laundry machine. He posted about his larceny adventure and shared the details about how card security works with this machine. We’re shocked that the control hardware is not under lock and key. Two screws are all that secures [...]
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12:01
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Hack a Day
While function generators or analog signal generators are ubiquitous in their utility, we haven’t seen much of logic function generators on Hack a Day. Luckily, [Dilshan] sent in a really neat 8-channel signal injector that is amazingly simple to build and comes with a great front end for editing patterns from your computer. The hardware portion of [...]
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11:01
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Hack a Day
[Arpad] has spent quite a bit of time reverse-engineering a home automation system, and, as he is quick to point out, presents the information learned for informational purposes only. He’s really done his homework (and documented it well), looking into the US patent application, and figuring out how the protocol works. If you’re wondering how [...]
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10:01
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Hack a Day
A signal generator is a handy bit of kit and with the right components, it’s pretty easy to build one. Fabricating a proper signal generator probe is another matter entirely. [Frank]‘s DIY signal generator probe does exactly what it claims to, and is very cheap to boot. After [Frank] made a simple signal generator with [...]
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5:01
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Hack a Day
[Leigh] is a HAM operator (you may know him as wa5znu). He is familiar with a signal visualization tool called a waterfall which plots signal strength and frequency over time. He wanted to build his own waterfall and ended up with this Arduino-based version which he calls Cascata. Cascata means waterfall in Italian which meshes nicely with Arduino’s [...]
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7:48
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Hack a Day
[Debraj] needed a simple signal generator for a project he was working on, but didn’t have one handy. He found that the easiest and cheapest way to get clean, reliable signaling was by using something that was already sitting on his desk – his PC. He found that the tone generator built into Audacity was [...]
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7:10
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Hack a Day
[Debraj] wrote to us describing a project he recently completed – a simple, compact spectrum analyzer using a 16-bit dsPIC microcontroller. The analyzer is fed an analog signal, which is passed through a large resistor followed by an opamp. A DC offset is then applied to the signal, after which it is passed through a [...]
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10:00
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Hack a Day
[Embedded lab] has a nice tutorial on building your own heart rate monitor. The monitor works by shining infrared light into the fingertip and looking at the changes in the reflected infrared signal caused by a heartbeat. The IR detector produces a very small AC signal so a couple of op-amps are used to filter and amplify the signal. [...]
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15:00
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Hack a Day
[Vassilis Papanikolaou] took a good thing and made it better with some design upgrades to this AVR based signal generator. We looked at version 1.0 of this tool back in 2006 and since then it saw an upgrade to 2.0. But [Vassilis] wanted to take things one step further, with a compact single-sided PCB. What [...]
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10:00
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Hack a Day
[Thomas Pfeifer] has taken the PPM signal produced by model aircraft wireless controllers, and with an ATMega8, converted the signal to act as a USB joystick. Which means you can now use a standard R/C remote control to fly model aircrafts on your computer. Of course now with PPM decoded you could also use the [...]
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13:00
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Hack a Day
[Nirvous] managed to get composite video out working on the DIDJ. He knew that the CPU had the ability to generate the signal, and that similar devices already had this capability. After studying some DIDJ teardowns he figured out which connection on the processor should provide the appropriate signal. Next was the firmware side of [...]
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16:57
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remote-exploit & backtrack
I have a X61s, and connected and disconnected the antenna at least 10 times, not more than 20-- and I currently get a weak wireless signal compared to other people (detail below). I am also running a X61s with some Lenovo software, so I'm not sure if the software is lowering the signal, but no matter what I do it still seems like I can't get it as high of a signal. Would removing the antenna connectors (cable at the 3945abg card) that many times damage it? I just bend the cable side up and the connector pops off.
As for low signal... I have a router running Tomato, and other computers in the same room get quality of ~60, and ~35-50 in the adjacent room (quality being dBi difference between noise floor and signal quality). However, my computer gets about 30-40 in room, and 10-20 in the adjacent room--and drops off much quicker a few rooms down.
If I want to fix it, what would I have to replace, or is there some other fix possible? (dip it in solder?)