Electronics questions

A Nipkow disk is a mechanical, rotating, geometrically operating image scanning device, patented in 1885 by Paul Gottlieb Nipkow. This scanning disk was a fundamental component in mechanical television through the 1920s and 1930s.

A barcode is an optical, machine-readable, representation of data; the data usually describes something about the object that carries the barcode. Initially, barcodes were only scanned by special optical scanners called barcode readers. Later application software became available for devices that could read images, such as smartphones with cameras.

Samsung Electronics is a multinational electronics company headquartered in Suwon, South Korea. It is the flagship company of the Samsung Group, with assembly plants and sales networks in 80 countries. It is the world's largest information technology company and chipmaker by revenue.

An AAA battery is a standard size of dry cell battery commonly used in low-drain portable electronic devices, such as TV remote controls, MP3 players and digital cameras.

Early television remote controls used ultrasonic tones. Present-day remote controls are commonly consumer infrared devices which send digitally-coded pulses of infrared radiation to control functions such as power, volume, channels, etc.

According to Ohm's law, the resistance (R) of an object is defined as the ratio of voltage across it (V) to current through it (I) : R = V/I. R = 12/4 = 3.

In 1930, Paul and Joseph Galvin together with William Lear developed the first car radio on the dashboard and called it "Motorola". The word "Motorola" meant "sound in motion". The first part pointed to the engine, the second part was the popular suffix "ola"

The transistor heralded in the “Information Age” and paved the way for the development of almost every electronic device, from radios to computers to space shuttles. For their monumental “researches on semiconductors and their discovery of the transistor effect,"4 Bardeen, Shockley and Brattain were presented with the Nobel Prize in Physics in 1956.

Samsung started out as a small trading company with forty employees located in Su-dong.

Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound.