This document discusses series and parallel circuits. A series circuit has components connected one after the other so that the same current passes through each component. A parallel circuit has components connected side by side so that components share the voltage across the circuit but the current divides between the components. The source provides information about basic electrical circuits.
This document discusses series and parallel circuits. A series circuit has components connected one after the other so that the same current passes through each component. A parallel circuit has components connected side by side so that components share the voltage across the circuit but the current divides between the components. The source provides information about basic electrical circuits.
This document discusses light emitting diodes (LEDs). It explains that LEDs are semiconductors that emit light of a single color when electrically biased in the forward direction. LEDs work by converting electrical energy into light energy as electrons move between energy levels and release photons. The color of the light depends on the energy level difference of the electrons. Common LED materials include gallium arsenide and gallium phosphide alloys. The document also outlines some applications of LEDs and notes that they must have resistors in series to limit current.
The document discusses various electrical components used in control panels and distribution boards, including PVC channels, cable glands, terminal strips, bus bars, emergency stop buttons, switches, lamp holders, sockets, main switches, miniature circuit breakers, plugs, relays, isolators, wires and cables, and electric chokes. It provides brief descriptions of each component and their purposes in electrical systems.
This document provides an introduction and overview of electronics concepts including:
- A review of short circuits, series vs parallel circuits, resistance, and basic components like resistors, switches, batteries, breadboards.
- Descriptions of key electronics terms like resistance, resistors, switches, batteries and how they function in circuits. Resistors add resistance, switches open and close circuits, batteries store power.
- An assignment to build circuits using resistors, batteries, switches, an LED, speaker, transistor, potentiometer and integrated circuit on a breadboard to apply the concepts learned.
The document defines various tools, materials, and safety terms related to electrical work. It provides descriptions of common tools like screwdrivers, pliers, wire strippers, knives, drills. It also defines electrical materials like outlets, switches, boxes, wires. Measuring instruments like meters, gauges, and rules are outlined. Finally, it covers health and safety hazards including physical, biological, ergonomic and psychological risks as well as warnings signs.
This document discusses light emitting diodes (LEDs). It explains that LEDs are semiconductors that emit light of a single color when electrically biased in the forward direction. LEDs work by converting electrical energy into light energy as electrons move between energy levels and release photons. The color of the light depends on the energy level difference of the electrons. Common LED materials include gallium arsenide and gallium phosphide alloys. The document also outlines some applications of LEDs and notes that they must have resistors in series to limit current.
The document discusses various electrical components used in control panels and distribution boards, including PVC channels, cable glands, terminal strips, bus bars, emergency stop buttons, switches, lamp holders, sockets, main switches, miniature circuit breakers, plugs, relays, isolators, wires and cables, and electric chokes. It provides brief descriptions of each component and their purposes in electrical systems.
This document provides an introduction and overview of electronics concepts including:
- A review of short circuits, series vs parallel circuits, resistance, and basic components like resistors, switches, batteries, breadboards.
- Descriptions of key electronics terms like resistance, resistors, switches, batteries and how they function in circuits. Resistors add resistance, switches open and close circuits, batteries store power.
- An assignment to build circuits using resistors, batteries, switches, an LED, speaker, transistor, potentiometer and integrated circuit on a breadboard to apply the concepts learned.
The document defines various tools, materials, and safety terms related to electrical work. It provides descriptions of common tools like screwdrivers, pliers, wire strippers, knives, drills. It also defines electrical materials like outlets, switches, boxes, wires. Measuring instruments like meters, gauges, and rules are outlined. Finally, it covers health and safety hazards including physical, biological, ergonomic and psychological risks as well as warnings signs.
2. Visuose juose yra elektronikos grandinės
Kas bendro tarp
šių įrenginių?
Ar žinai?
3. Kas yra elektros grandinė? Grandinė yra kelias, kuriuo bėga
elektronai. Elektronai laidininku
bėga nuo neigiamo baterijos
poliaus per įvairius
komponentus link teigiamo. Jei
grandinę nutrauksime, elektronų
srautas nutrūks!
4. Iš ko daromi laidininkai?
Laidininkai dažniausiai daromi
iš metalo, tokio kaip varis,
aliuminis, sidabras ar auksas
O kai kurios medžiagos
priešingai – stabdo
elektronų judėjimą. Tai pvz.
plastikas, guma. Jos
vadinamos izoliatoriais.
5. Nuoseklios grandinės
Jei sujungsime kelis
komponentus vieną paskui
kitą ir leisime per juos tekėti
elektros srovei, turėsime
nuoseklią grandinę
Jei nuoseklioje grandinėje
esančią lemputę
sudaužysime ar
atjungsime, srovė nustos
tekėti ir grandinė
nebeveiks.
7. Elektros srovė ir jos matavimas
Srovė yra matavimo vienetas,
kuris parodo, koks elektronų
srautas eina per grandinę. Ji
matuojama amperais (A), o
prietaisas vadinamas
ampermetru. Ampermetras
grandinėje jungiamas nuosekliai.
Elektros srovę galima palyginti
su vandens srove iš čiaupo
8. Elektros įtampa ir jos matavimas
Elektros įtampa yra elektros energijos skirtumas tarp skirtingų
grandinės vietų. Elektros įtampa matuojama voltais (V).
Įrenginys matuojantis elektros įtampą vadinamas voltmetru ir
jis jungiamas gandinėje lygiagrečiai komponentams.
Įtampą galime
palyginti su
spaudimu, kurį
sukuria vanduo,
esantis vandens
bokšte.
9. Kas yra elektrinė varža?
Elektrinė varža yra
medžiagos savybė
priešintis elektros srovei.
Varžos matavimo vienetas
yra omas (Ω)