The Signs of a Bad CMOS Battery. 1  How to Remove a Desktop Battery From the Acer Aspire. 2  How to Replace the CMOS Battery in a Dell Latitude 600. 3  How to Replace a CMOS Battery. 4  How to Clear CMOS on HP Laptops. 5  How to Make a Computer Turn on From the Motherboard.
A summary of near-field communication. Near-field communication (NFC) is a set of communication protocols that enable two electronic devices, one of which is usually a portable device such as a smartphone, to establish communication by bringing them within 4 cm (1.6 in) of each other.
Bluetooth is a wireless technology that allows exchange of data over short distances using short wave length radio transmission. In Bluetooth technology, radio waves of microwave frequency range are used. Bluetooth technology uses a radio technology called 'frequency hopping spread spectrum'. It is a method of transmitting radio signals by quickly changing the carrier throughout the multiple frequency channels using a pseudo random sequence known to both transmitter and receiver. Bluetooth technology gives us the benefits of wireless control &communication among different devices.