The world of technology is based on facts rather than fiction. But, adding new technology every year the myths about tech gadgets come to existence and popular. Some users start to live with it. The popular myths are like as you will ruin your laptop by leaving it plugged in? or higher the megapixels, better the picture quality? So, it is a time to bust them and let the user know some useful facts about the technology which he or she is gonna use in his or her daily life.
- It is very popular myth about apple electronics products that Mac OS never gets viruses. But, it is impossible. For a while a company claimed it got immunity from malware software and viruses. However, if hackers love something, it's a good challenge. In April 2012, Mac users around the world suffered a flashback trojan outbreak. It affected roughly 6,00,000 owners and which forced the company to take down a line on its website that says "Mac does not get PC viruses".
Buzzer is a electronic device that converts the electronic signal into buzzing noise, that is applied to it. It can be used as electronic bell or as quiz buzzer in many applications around us. Here, i world like to discuss the interfacing of a small buzzer with 8051 microcontroller and how different projects can be constructed. Buzzer Interfacing: This project shows the interface with AT89S52 microcontroller to a buzzer. When a push button is pressed, the buzzer will get ON and OFF ( number of times set in the code ) and then stops. Circuit Diagram: - The port P1 of the microcontroller is connected to buzzer. This type of connection is possible, if the current requirements of the buzzer is not more than 20mA. The output is in current source mode so that buzzer will turn ON when the output of the port is logic LOW. Switch is connected to port P3 which remains at logic HIGH by pull up resistor. Code: #include "REG52.h" #define buz P1 sbit SW=P3^0; long i...
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