http://kukuruku.co/hub/diy/usb-killer You know that you can mess up computer software and firmware throug USB port. But can USB powered device electrically destroy your PC? The answer seems to be yes after you check this nasty hack. Do not try this at home. Posted from WordPress for Android →
If you are a long time hacker, you might remember all resistor color codes so well that you have no problem in reading them without thinking to much. For other there are those resistor color code tables and calculators. But could this task be automated? Maybe with mobile phone? Reading Resistors With OpenCV posting mentions →
Why do digital oscilloscopes appear noisier than traditional analog oscilloscopes? In EEVblog #601 – Why Digital Oscilloscopes Appear Noisy posting Dave busts the myth that digital scopes are noiser than analog scopes, and demonstrates what inherent advantages digital scopes can have over analog scopes in terms of true waveform capture. And how long exposure camera shots →
Do you need to do RF Calculators & Conversions? Pasternack just published new RF calculators and conversion on-line tools to pasternack.com. Pasternack’s RF/Microwave calculators and conversions section provides easy-to-use tools ranging from complex mathematical formulas to simple conversions. Besides just making the calculations those tools also show the equations used to make the calculations (so →
Android devices can be used as signal generators and signal analyzers. It is easy when all you want is to get the signal out of the speaker or headphone connector, and you are happy to analyze what internal microphone in the device receives. But what if you want to feed some external signal into your →
Sound pressure level (SPL) or sound level is a logarithmic measure of the effective sound pressure of a sound relative to a reference value. It is measured in decibels (dB) above a standard reference level (20 µPa, which is usually considered the threshold of human hearing at 1 kHz). I have earlier used several different decibel →
I saw an interesting kit at banggood.com and decided to try it: DIY Meter Tester Kit For Capacitance ESR Inductance Resistor NPN PNP Mosfet M168 . The reasons for interests are good specifications, based on open source hardware design and price is reasonable ($12.22 / 9.37 Euro). DIY Meter Tester Kit For Capacitance ESR Inductance →
Have you ever wondered how stable voltage your USB power source gives and how much current does your device take (your mobile phone charging or own circuit? 0.28″ LED 3-Digit Red Display USB Power Charger Data Transmit Current Voltage Tester (3~10V/0~3A) is a product that can do that. It shows the charging voltage and current →
CFE Media’s Apps for Engineers is an an interactive directory of almost 60 engineering-related Android applications that were created by various companies. The idea is to offer a “pre-sort” of relevant mobile engineering applications loaded with various calculators, catalogs, file viewers, measurement tools, and more. Apps for Engineers is targeted for engineers working in industrial, →
Here are links to articles that list a large number of useful free tool for electronics design: Top Free DIY Tools Every EE Needs 10 Free Math Analysis & Design Tools for Engineers →