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Archive for the ‘techniques’ Category

Inverter crystal oscillator

Saturday, July 23rd, 2016

Vasily Ivanenko writes: In numerous RF synthesizer chips lies an inverter with input and output pins for making a reference crystal oscillator clock. I built some discrete chip inverter xtal oscillators with 74HC series logic gates to better examine them. You'll quickly recognize the oft-used Pierce oscillator topology with 1...

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Posted in techniques | 1 Comment »

RC snubber calculator spreadsheet

Thursday, May 26th, 2016

Paulo has developed a free RC snubber calculator, an Excel-based calculator eases the design of RC snubbers in power switching applications: In power switching applications, a designer often has to contend with spurious oscillations. These are the result of parasitic capacitances and inductance on the board and behave like the...

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Posted in techniques | No Comments »

Using Altium for a DirtyPCBs order

Wednesday, March 16th, 2016

Jarrett  has written an article describing a technique of using Altium for a DirtyPCBs order: This is a pretty rare combo: using a premium PCB package with the budget board house. Kinda funny. Generally these small run PCB houses provide DRU and CAM files for EAGLE design rule checking and...

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Posted in DirtyPCBs.com, techniques | No Comments »

Things to avoid when sending PCBs to the fab house

Friday, February 26th, 2016

Sjaak shared some tips when sending PCBs to the fab house: I usually collect a few PCB designs before sending them off to the PCB fabhouse. I prefer to use dirtypcbs.com as I know Ian from dangerousprototypes.com for a long time and think he provides good quality, and fast turn...

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Posted in PCBs, techniques | 10 Comments »

Creating high resolution integrated circuit die photos with Hugin or ICE

Thursday, December 31st, 2015

Ken Shirriff has written an article describing a technique he used for making high resolution integrated circuit die photos: Have you ever wanted to take a bunch of photos of an integrated circuit die and combine them into a high-res image? The stitching software can be difficult, so I've written...

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Posted in how-to, techniques | 2 Comments »

Using the RTL-SDR dongle to detect meteors

Thursday, January 1st, 2015

According to AMSAT-UK, "a new paper has been released by Dr David Morgan 2W0CXV on using the RTL2841 DVB TV Dongle as a SDR processor with SpectrumLab. The paper 'Techniques for using the RTL Dongle for Detecting Meteors' covers the setting up and use of the dongle to receive meteor...

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Posted in SDR, site, techniques | No Comments »

Monitoring Android traffic with Wireshark

Tuesday, August 26th, 2014

Ever wonder what data is being sent out by your Android device? Here's a post from LinuxJournal outlining how to monitor your device's WiFi traffic. The technique involves setting up a man-in-the-middle Wireless Access Point (WAP) on your Ubuntu Linux box, then connecting your Android device via WiFi to this...

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Posted in Android, Linux, security, software, techniques | No Comments »

SMD soldering station for Weller soldering tips

Thursday, May 29th, 2014

Martin Kumm writes: This page provides documents about a cheap SMD solder station built as an Arduino shield (Arduino UNO). It supports active soldering tips from Weller (RT series) which contain the heating element as well as a sensor and provides a standard 3.5 mm jack. Together with the corresponding...

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Posted in techniques, tools | No Comments »

Shmoocon 2014: vehicle infotainment data forensics

Wednesday, April 30th, 2014

Courtney Lancaster gave this talk at Shmoocon 2014 outlining the types of information available from vehicle infotainment systems "This talk will take an in-depth look at infotainment technologies and how to forensically acquire the data associated with the functionalities that exist across various manufacturers. Furthermore, we will cover the challenges...

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Posted in security, techniques, Videos | 1 Comment »

Cleanly de-soldering a pin header

Wednesday, April 23rd, 2014

[embed]http://www.youtube.com/watch?v=EjOxhnDGb9k[/embed] boldport has written an article describing a technique he’s used for removing the header cleanly: Know that sinking feeling after realising that you've soldered that 40-pin header on the wrong side of the board? I've come up with a technique that works for me for removing the header cleanly and...

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Posted in how-to, techniques | 3 Comments »

Advanced Hard Drive Caching Techniques

Monday, December 9th, 2013

Petros Koutoupis at Linux Journal posted detailed information regarding hard drive caching techniques. Users of traditional hard drives who've been considering a switch to a solid state drive (SSD) should find this particularly interesting. Petros describes, Even today, the consumer SSD cannot compare to the capacities provided by the magnetic...

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Posted in Linux, techniques | 1 Comment »

Blackhat Euro: cheap open source USB drive write blocker

Tuesday, October 29th, 2013

At last year's Blackhat Europe con, Philip A. Polstra, Sr. from the University of Dubuque gave a presentation detailing how to protect your USB security drive toolkit from auto erasure by the target machine. He describes the design of an open source USB flash drive write blocker based on the...

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Posted in open source, security, techniques, USB | No Comments »

iSEC Open Security video: Hacking the Wireless World

Thursday, October 3rd, 2013

In this presentation from the iSEC Open Security Forum, September 12, 2013 in Palo Alto, CA, Balint Seeber, Applications Engineer and SDR Evangelist / Ettus Research, provides an introduction on how to analyze and hack RF communications systems using open source software and cheap radio hardware. He describes, "The focus...

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Posted in RF, SDR, techniques, Videos, wireless | No Comments »

Tracking low earth satellites using RTL-SDR

Wednesday, August 7th, 2013

Travis Goodspeed has been experimenting with remote satellite tracking over the internet. His setup uses a satellite dish originally used with a mobile earth station on maritime vessels. Movement of the dish is accomplished with servos and an EiBotBoard" wired into a BeagleBone. Travis describes further, "My initial build using...

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Posted in SDR, techniques | 1 Comment »

Mounting an SD/MMC via parallel port using Linux

Monday, June 3rd, 2013

Vinod has been experimenting with mounting an SD/MMC card connected to the parallel port of his Linux desktop machine. He recounts, "For the last few days I was engaged on a mad project; I was trying to access as SD card directly via parallel port of my desktop PC with...

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Posted in code, how-to, Linux, techniques | No Comments »

ATmega 644 based VGA adapter

Sunday, May 5th, 2013

Ryan Fanelli and David Hartino, students in Cornell University's Electrical and Computer Engineering program, have written a detailed explanation of their ATmega 644 based VGA adapter. The pair developed this "homemade video card" as their final project in the program, pushing the envelope on MCU clock cycle optimization using only...

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Posted in AVR, project logs, techniques, tutorials | 1 Comment »

Homebrew SMT stencil

Monday, April 22nd, 2013

Andre shares this short article on how to make homebrew solder paste stencils from 0.1mm brass plates. Via the contact form.

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Posted in skills, techniques | No Comments »

Excel-based transistor amplifier calculator

Friday, March 29th, 2013

Paulo shared an Excel-based transistor amplifier calculator.  'Besides the basic gain and biasing calculations many others implement, this calculator can also estimate noise which is a bit more involved': ..Because this is a circuit I use frequently, I decided to make an Excel spreadsheet to ease the calculations. The spreadsheet...

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Posted in techniques | 7 Comments »

Tips & tricks to sort and rework surface mount devices (SMD)

Monday, March 25th, 2013

[embed]http://www.youtube.com/watch?v=6j7qxM8EN4M [/embed] Tips & tricks to sort and rework surface mount devices (SMD): I’m a member of the Superstition Amateur Radio Club (SARC) and each month we have a presentation on a ham radio related subject. I volunteered to record and upload the club’s monthly presentations. There were two presentations...

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Posted in how-to, techniques | 12 Comments »

Tips on QFP breakout board soldering

Saturday, March 2nd, 2013

Joe Desbonnet writes in with two tips he learned when using the DP QFP breakout board. Via the contact form.

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Posted in techniques | 9 Comments »

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Recent Comments

  • DP.: fixed, thanks
  • Bovine: Title of article has the wrong number for ESP8266 typed.
  • burkm m: It drifting even further using that standard XO...
  • langwadt: a HC14 is a bad choice for an xtal oscillator, the unbuffered non-Schmitt trigger HCU04 is much better for that application
  • Bill F: I'm ready for one!