Hardware hacks

Probing Ethernet cable with an oscilloscope

This article talks about measuring 10 Mbit/s (10Base-T) and 100 Mbit/s (100Base-TX) twisted pair Ethernet signals. Those standards use two wire pairs for the communications and use differential signaling. Differential signaling is a method for electrically transmitting information using two complementary signals. The technique sends the same electrical signal as a differential pair of signals,

Reverse Engineering Hardware of Embedded Devices

http://blog.sec-consult.com/2017/07/reverse-engineering-hardware.html?m=1 Nowadays, we are living in a world dominated by embedded systems. Everyone can be spied on through various channels. Routers, IP-cameras, phones, and other embedded devices are affected by security vulnerabilities and are therefore easily hack-able.  This article covers some basic hardware reverse engineering techniques on PCB-level, which are applicable to any electronic embedded

GarrettCom Converter Repair

http://www.epanorama.net/newepa/2015/01/14/garrettcom-converter-teardown/ I did more than two years ago tear-down of this 100 Mbit/s copper to fiber Ethernet media converter (link above). Now I decided to try to fix it. It turned out that originan PSU did not put out right 3.3V voltage, but considetably less. The digital electronics worked out nicely when fed with 3.3V

HoloKit is like Google Cardboard for augmented reality | TechCrunch

https://techcrunch.com/2017/06/02/holokit-is-like-google-cardboard-for-augmented-reality/?ncid=rss&utm_source=tcfbpage&utm_medium=feed&utm_campaign=Feed%3A+Techcrunch+%28TechCrunch%29&utm_content=FaceBook&sr_share=facebook The revelation behind Google Cardboard was that if you put your phone close enough to your eyes, it’s basically a VR headset — but it’s not quite that simple for mixed reality setups like Microsoft’s HoloLens. Or is it? HoloKitis an extremely clever DIY solution for a quick and dirty augmented reality experience with

IoTuesday: Maximize Your WiFi!

https://www.sparkfun.com/news/2363 Interesting looking project: mount the antenna and ESP8266 Thing Dev Board onto a pan/tilt bracket with some servos. The ESP8266 code was updated to connect to a WiFi access point (AP) and begin sweeping up and down (about 70°) and left to right (about 180°). At 5° increments, the ESP8266 would take an RSSI reading. Finally the antenna automatically returns

Amazing Oscilloscope Graphics

Amazing Oscilloscope Graphics page presents a demonstration that has built a 2D audio output on top of the Unity game engine, enabling him to output X and Y values from his stereo soundcard straight to an oscilloscope in XY mode. Have a look at this pyramid demo. There is also an oscilloscope drawing application: electricanvas