1. Smartphone Overview iPhone 4 By Anthony Poland 6 Nov 2014

2. iPhone 4 Disclaimer The iPhone 4 is the product I own and is why is the subject of this topic. The information in this article applies to all smartphone brands and models.

3. iPhone 4 Computer The iPhone has a processor, memory and can carry out logic and arithmetic operations. It is a computer.

4. iPhone 4 Magnetometer The iPhone has a sensor called a magnetometer used for two general purposes: to measure the magnetization of a magnetic material like a ferromagnetic or to measure the strength and, in some cases, the direction of the magnetic field at a point in space.

5. iPhone 4 Accelerometer The iPhone has a sensor called an accelerometer used for measuring “proper acceleration” which is acceleration relative to free fall. For example, an accelerometer at rest on the surface of the Earth will measure an acceleration g= 9.81 m/s 2 straight upwards. By contrast, accelerometers in free fall orbiting and accelerating due to the gravity of Earth will measure zero.

6. iPhone 4 Gyroscope The iPhone has a sensor called a gyroscope used for measuring or maintaining orientation, based on the principles of angular momentum.

7. iPhone 4 Digital Camera The iPhone has a sensor called a digital camera that is used for encoding images and videos digitally and storing them for later reproduction.

8. iPhone 4 Light-emitting Diode The iPhone has an emitter called a light-emitting diode (LED) that is used to illuminate surroundings. Modern LEDs are available across the visible, ultraviolet, and infrared wavelengths, with very high brightness.

9. iPhone 4 Microphone The iPhone has a sensor called a microphone used for converting sound in air into an electrical signal.

10. iPhone 4 Speakers The iPhone has an effector called a microphone used for converting an electrical audio signal into a corresponding sound.

11. iPhone 4 UHF Transmitters The iPhone has multiple UHF radios used for making and receiving telephone calls over a radio link. Multiple radios are required because of multiple standards. Many phones support three bands (900/1,800/1,900 MHz or 850/1,800/1,900 MHz) or four bands (850/900/1,800/1,900 MHz).

12. iPhone 4 Wireless 802.11x Transmitter The iPhone has a wireless network interface card (NIC) for communicating over wireless networks.

13. iPhone 4 Bluetooth Transmitter The iPhone has a Bluetooth Transmitter for very short range wideband communication.

14. iPhone 4 Global Positing System (GPS) Receiver The iPhone has a GPS receiver used for accurately calculating geographical location by receiving information from GPS satellites. Initially it was used by the United States military, but now most receivers are in automobiles and smartphones.

15. iPhone 4 Global Positing System (GPS) Receiver The iPhone has a GPS receiver used for accurately calculating geographical location by receiving information from GPS satellites. Initially it was used by the United States military, but now most receivers are in automobiles and smartphones.

16. iPhone 4 Touchscreen The iPhone has a touchscreen that is used for graphical user interface navigation. The body is like a battery having a higher voltage than the environment. The touchscreen is made of tiny capacitors arranged in a grid that are sensitive to voltage changes. This change detection initiates computer operations.

17. iPhone 4 Liquid Crystal Display The iPhone has a liquid crystal display that is used for producing an image by passing light through selected segments of the liquid crystal and then reflecting it back from the mirror to the viewer. LCDs have conductive plates or a LEDs commonly.

18. iPhone 4 Inertial Navigation System The iPhone has an inertial navigation system (INS) that uses a computer, motion sensors (accelerometers) and rotation sensors (gyroscopes) to continuously calculate via dead reckoning the position, orientation, and velocity (direction and speed of movement) of a moving object without the need for external references (GPS).

19. iPhone 4 Inertial Navigation System In navigation, dead reckoning (also ded (for deduced) reckoning or DR) is the process of calculating one's current position by using a previously determined position, or fix, and advancing that position based upon known or estimated speeds over elapsed time and course.

20. iPhone 4 Fire Control The iPhone has an inertial navigation unit that could be used in defense and security applications as an integral part of a Fire Control Navigation Panel (FCNP) (see command and control) consisting of an Inertial Navigation Unit, Fire Control Computer, and target identification set laser.