Author Archive

Diode detector for RF

Here is a simple diode detector for RF signals. I can feed RF signal from left and get DC output from right. The DC output can be fed to Arduino analog in. The diode in the circuit is germanium diode for low voltage drop. The circuit works well for fractions of volts to several volts →

FREAK attack on HTTPS

A new security hole to attach against HTTPS has been found! It called FREAK Attack. FREAK (Factoring RSA Export Keys) name called hole to force the equipment to spend a considerable outdated encryption – OpenSSL, iOS and OS X tricked into using weak 1990s-grade encryption keys. Well-planned man-between-the attack of the hacker could hijack a →

Arduino PLC

The PLC (Programmable Logic Controller) has been and still is the basic component of the industrial automation world. PLCs are usually pretty expensive pieces of hardware, which led many people who know micro-controllers to come up with their own ideas to implement similar functionality. Arduino is a kind of universal programmable controller, although it is →