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Learn electronics using tutorials

Learn electronics using tutorials for beginners. Learn how to design electronic circuits and how to use electronic parts .

PN junction

A PN junction diode is an electrical device that allow current to move through it in one direction with far greater ease than in the other.

Batteries function principles and construction

One of the most important and remarkable discoveries was electricity. The practical use of electricity has only been at our disposal since the mid-to late 1800s . The first method of generating electricity was by creating a static charge. In 1660 Otto von Guericke constructed the first electrical machine that consisted of a large sulphur globe which, when rubbed and turned, attracted feathers and small pieces of paper. Guericke was able to prove that the sparks generated were truly electrical.

AT Commands

AT commands are a group of commands that can be sent by a terminal or host computer to control the ISU  (Iridium Subscriber Unit ) in Command mode.

When the ISU is in command mode (or off-line mode), AT commands can be entered to control the phone.

When in data (also called on-line) mode, the ISU is connected to a remote system and any characters sent it will be transmitted to the remote system. It is possible to enter the command mode without terminating call by using the +++ escape sequence detailed below.


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