23-05-2017, 04:11 AM
Please I need this topic on a full project
|
walkie talkie project
|
Please I need this topic on a full project
27-05-2017, 12:14 PM
A walkie-talkie (better known formally as a portable transceiver, or HT) is a handheld, portable, two way radio transceiver. Its development during World War II has been attributed to Donald L. Hings, radio engineer Alfred J. Gross and Motorola engineering teams. The former were used for infantry, similar designs were created for field artillery and tank units, and after the war, walkie-talkies were extended to public safety and finally to commercial and labor work.
Typical walkie-talkies resemble a telephone, with a built-in speaker on one end and a microphone on the other (in some devices the speaker is also used as the microphone) and an antenna mounted on the top of the unit. They stop in the face to talk. A walkie-talkie is a half-duplex communication device; Multiple walkie-talkies use a single radio channel, and only one radio on the channel can transmit at a time, although any number can listen. The transceiver is normally in receive mode; When the user wants to speak, press a push-to-talk (PTT) button that turns off the receiver and turns on the transmitter.
Typical walkie-talkies resemble a telephone, with a built-in speaker on one end and a microphone on the other (in some devices the speaker is also used as the microphone) and an antenna mounted on the top of the unit. They stop in the face to talk. A walkie-talkie is a half-duplex communication device; Multiple walkie-talkies use a single radio channel, and only one radio on the channel can transmit at a time, although any number can listen. The transceiver is normally in receive mode; When the user wants to speak, press a push-to-talk (PTT) button that turns off the receiver and turns on the transmitter.
|
« Next Oldest | Next Newest »
|
