crisstel.ro rezistori in paralel

Analogie electricitate – curgerea fluidelor

Share on facebook
Facebook
Share on twitter
Twitter
Share on linkedin
LinkedIn
Share on email
Email
Share on print
Print

Una dintre cele mai simple modalități de a înțelege conceptele de baza ale electricității este de a apela la o analogie cu modul de curgere al fluidelor, pe care îl înțelegem intuitiv din experiența proprie.

Astfel, să ne închipuim apa curgând printr-un mecanism de țevi, de diverse diametre.

Arduino electricitate curgerea fluidelor conceptele de baza ale electricității

robofun.ro

arduino electricitate curgerea fluidelor conceptele de baza ale electricității

Să ne închipuim că avem pompe care împing apa prin țevi, pompe cu puteri diverse. Acum, dacă în loc de apa ne închipuim un flux de electroni, în loc de țevi, fire conductoare și  în loc de pompe surse de tensiune (baterii sau alimentatoare), obținem o analogie care funcționează aproape perfect pentru a înțelege teoria electricității.

arduino air quality sensor z wave freqvency counter operator jumpers

activitati-cadou.ro

Astfel, la un moment dat printr-o anumita țeavă trece o anumita cantitate de apa.

wires enum 16X2 lcd 74hc595 2560

activitati-cadou.ro

wires enum 16X2 lcd 74hc595 2560

La fel, printr-un fir, la un moment dat trece o anumita cantitate de curent.

arduino air quality sensor z wave freqvency counter operator jumpers

Cât de mult curent trece printr-un fir la un moment dat este un element caracterizat de intensitatea curentului electric, măsurată în Amperi.

Dacă ne închipuim un circuit format din mai multe țevi mufate între ele sub forma unui circuit închis, este clar că prin fiecare țeavă circulă exact aceeași cantitate de apa la un moment dat (apa pleacă din pompa, trece prin fiecare țeavă, și  apoi se întoarce înapoi în pompă, exact câtă apa pleacă, exact atâta se întoarce).

arduino gsm module geiger module javascript quadrature encoder nano

Exact în același mod, intensitatea curentului electric este aceeași în oricare punct al unui circuit electric simplu (fără bifurcații).

power consumption datasheet

alecoair.ro

debounce youtube 32 bit

Altfel spus, prin oricare punct al unui circuit fără bifurcații trece aceeași cantitate de curent.

alecoair.ro

arduino keyboard input joystick library oled I2C 2d array hardware button

Mai departe, dacă ne gândim că țevile au diametre diferite, dar prin ele circula aceeași cantitate de apă, atunci presiunea apei este diferită în fiecare țeavă, în funcție de diametrul acesteia.

arduino and raspberry pi projects yun xbee shield vu metter xbox

bricopro.ro%20

Echivalentul presiunii apei din țevi, în cazul curentului electric, este potențialul electric (sau tensiunea) și  se măsoară în Volți. Dacă ai udat vreodată cu furtunul în gradină, atunci știi ca pentru a creste presiunea apei, tot ce ai de făcut este să strângi furtunul (sa-i micșorezi diametrul).

controller 4X4 keypad float to int 5V output 2 relay module plotter

Diametrul țevii (practic, rezistenta pe care o opune țeava trecerii apei) este echivalentul în cazul circuitelor electrice cu rezistenta elementului electric, și  se măsoară în Ohm. Exista elemente electrice speciale, care se cheamă rezistoare și  care sunt folosite tocmai pentru rezistenta cu care se opun trecerii curentului electric.

Dacă ne gândim că în cazul furtunului cu apa, cu cât diametrul furtunului este mai mic (deci rezistenta opusă apei este mai mare) cu atât presiunea apei este mai mare, atunci putem scrie : intensitatea = tensiunea / rezistenta

arduino 433mhz hub ota 9V battery arduino 28byj-48 2560 pinout to excel

Conținutul acestui articol este în format PDF pus la dispoziție de specialiștii RoboFun.ro. Pentru a vizualiza apăsați butonul Preview iar pentru a descărca butonul Download.

arduino shop 3D scanner open source circuit design yield 8266 json library

Analogie electricitate – curgerea fluidelor

  • Una dintre cele mai simple modalitati de a intelege teoria electricitatii este de a apela la o analogie cu modul de curgere al fluidelor, pe care il intelegem intuitiv din experienta proprie. Astfel, sa ne inchipuim apa curgand printr-un mecanism de tevi, de diverse diametre. Sa ne inchipuim ca avem pompe care imping apa prin tevi, pompe cu puteri diverse. Acum, daca in loc de apa ne inchipuim un flux de electroni, in loc de tevi, fire conductoare si in loc de pompe surse de tensiune (baterii sau alimentatoare), obtinem o analogie care functioneaza aproape perfect pentru a intelege teoria electricitatii. Astfel, la un moment dat printr-o anumita teava trece o anumita cantitate de apa. La fel, printr-un fir, la un moment dat trece o anumita cantitate de curent. Cat de mult curent trece printr-un fir la un moment data este un element caracterizat de intensitatea curentului electric, masurata in Amperi. Daca ne inchipuim un circuit format din mai multe tevi mufate intre ele sub forma unui circuit inchis, este clar ca prin fiecare teava circula exact aceeasi cantitate de apa la un moment dat (apa pleaca din pompa, trece prin fiecare teava, si apoi se intoarce inapoi in pompa, exact cata apa pleaca, exact atata se intoarce). Exact in acelasi mod, intensitatea curentului electric este aceeasi in oricare punct al unui circuit electric simplu (fara bifurcatii). Altfel spus, prin oricare punct al unui circuit fara bifurcatii trece aceeasi cantitate de curent. Mai departe, daca ne gandim ca tevile au diametre diferite, dar prin ele circula aceeasi cantitate de apa, atunci presiunea apei este diferita in fiecare teava, in functie de diametrul acesteia. Echivalentul presiunii apei din tevi, in cazul curentului electric, este potentialul electric (sau tensiunea) si se masoara in Volti. Daca ai udat vreodata cu furtunul in gradina, atunci stii ca pentru a creste presiunea apei, tot ce ai de facut este sa strangi furtunul (sa-i micsorezi diametrul). Diametrul tevii (practic, rezistenta pe care o opune teava trecerii apei) este echivalentul in cazul circuitelor electrice cu rezistenta elementului electric, si se masoara in Ohm. Exista elemente electrice speciale, care se cheama rezistoare si care sunt folosite tocmai pentru rezistenta cu care se opun trecerii curentului electric. Daca ne gandim ca in cazul furtunului cu apa, cu cat diametrul furtunului este mai mic (deci rezistenta opusa apei este mai mare) cu atat presiunea apei este mai mare, atunci putem scrie : intensitatea = tensiunea / rezistenta  

    Citește și :

    https://crisstel.ro/arduino-cum-accesez-o-memorie-eeprom-externa/   https://crisstel.ro/arduino-cum-extinzi-numarul-pinilor-folosind-circuitul-integrat-74hc595/

    Poți folosi următorul cupon de reducere pentru a obține discount la componente electronice:

    [wpcd_coupon id=2636]

    Pentru alte cupoane de reducere apăsați aici

    Xiaomi Mi Note 10 (CC9 Pro) 108MP Penta Camer cupon banggood
    Xiaomi Mija Temperature Humidity Monitoring E banggood romania
    Xiaomi Mijia Bluetooth Thermometer 2 Wireless Smart Electric Digital Hygrometer Thermometer Work with Mijia APP www bangood com online
    Xiaomi Mijia Handheld Cordless Wireless Vacuu banggood login
    Xiaomi Mijia Laser Projector - English Versio coupons from China
    Xiaomi Mijia Laser Projector - English Version - White EU Plug banggood cupon
    Xiaomi Mijia LYWSD03MMC Bluetooth 4.2 Househo banggood coupons
    Xiaomi Mijia MJDDLSD001QW Home Electric Screw coduri de reducere pentru Banggood
    Xiaomi Mijia MJJGTYDS02FM DLP 1080P Portable Projector - White EU Plug cupon  gearbest
    Xiaomi Mijia MJYD01YL Sensor Night Light - White 3PCS gearbest romania
    Xiaomi Mijia MTJD02YL  Portable Eye-protectio madalin gearbest
    Xiaomi Mijia Multi-mode Smart Home Gateway 2.4G WiFi Bluetooth ZigBee 3.0 Connection App Control Intelligent Linkage madalin china gearbest
    Xiaomi Populele APP LED Bluetooth USB Smart Ukulele 1pc - Cream normal type gearbest com romania
    Xiaomi Redmi 7A 5.45 inch 4G Smartphone Globa gearbest plata ramburs
    Xiaomi Redmi 7A 5.45 inch 4G Smartphone Globa belgium registered gearbest
    Xiaomi Redmi 8 4+64GB Ruby Red EU gearbest promotional code
    Xiaomi Redmi Note 8 4G Smartphone Global Vers promotion coupon
    Xiaomi Redmi Note 8 Global Version 4+64GB Nep promotion code 2020
    Xiaomi Redmi Note 8 Global Version 4+64GB Spa coupon gearbest 2020
    Xiaomi VIOMI V2 Pro vacuum cleaner 2100Pa LDS intelligent electric control tank EU plug - Black EU Germany
    Xiaomi WalkingPad alcoolmetru
    Xiaomi Wear 3100 Cortex - A7 44mm Smart Watch Health Data Monitor NFC
    HIFU Ultrasound Rejuvenation Anti Wrinkle Beauty Machine cupon banggood
    AC 110V/220V 3 Flavor Steel Commercial Frozen Soft Ice Cream Cone Maker Machine banggood romania
    Xiaomi Ecosystem FENGMI 4K Cinema 1700 ANSI Lumens 2GB DDR3 RAM 64GB EMMC ROM bluetooth 4.0 MIUI Laser Smart 4K TV With 100 Inch Screen www bangood com online
    DJI Mavic 2 Pro / Zoom 8KM 1080P FPV w/ 3-Axis Gimbal 4K Camera Omnidirectional Obstacle RC Drone banggood login
    PowerVision PowerRay Underwater Drone Fishing Camera 1080p Wizard With 4K UHD Boating Rc Submarine coupons from China
    ROV POSEIDON Drone Underwater 1080P Camera Undersea Detection Underwater 50M/100M RC Submarine banggood cupon
    8x4x3 m Inflatable Giant Car Workstation Spray Paint Tent Coat Paint Booth Custom banggood coupons
    Portable Giant Oxford Cloth Inflatable Tent Workstation Spray Paint With 110V Blower coduri de reducere pentru Banggood
    8x4x3M Mobile Portable Giant Inflatable Car Paint Spray Booth Custom Tent Cabin W/ 220V Air Blower cupon  gearbest
    275x79x4inch Inflatable Tumbling Mat Air Track Outdoor Home Gymnastics Training Sport Protection Pad gearbest romania
    220V 1200W 3 Flavor Commercial Frozen Ice Cream Cones Machine Soft Ice Cream Machine madalin gearbest
    Giant Workstation Inflatable Spray Paint Booth Tent Custom with 2PCS Blower 110V 6*3*2.5m madalin china gearbest
    Xiaomi Gaming Laptop 15.6 inch Intel Core i7-9750H NVIDIA GeForce RTX2060 144Hz 16GB GDDR4 RAM 512GB PCle SSD Notebook gearbest com romania
    472x78x7.8inch  Inflatable Gym Mat Air Track Floor Tumbling Gymnastics Cheerleading Pad gearbest plata ramburs
    [EU Direct] RICH BIT TOP-619 36V 250W 10.2Ah 14 inch Folding Electric Bike 30-35KM/H Top Speed 70KM Mileage Range Moped Electric Bicycle belgium registered gearbest
    [EU Direct] RICH BIT TOP-619 10.2Ah  36V 250W 14 inch Folding Electric Bike 30-35KM/H Top Speed 70KM Mileage Range Moped Electric Bicycle gearbest promotional code
    Xiaomi Gaming Laptop 15.6 inch Intel Core i7-9750H NVIDIA GeForce GTX1660Ti 16GB GDDR4 RAM 512GB PCle SSD 144Hz 72% NTSC Notebook promotion coupon
    JmGO 1895 Native 1080p HD Android 3D Home Cinema Projector Smart TV Built-in HiFi Customize Stereo with LiveTV-Chinese Version promotion code 2020
    Xiaomi Gaming Laptop 15.6 inch Intel Core i5-9300H NVIDIA GeForce GTX1660Ti 144Hz 8GB GDDR4 RAM 512GB PCle SSD 72% NTSC Notebook coupon gearbest 2020
    Xiaomi Mi Air Laptop 2019 13.3 inch Intel Core i7-8550U 8GB RAM 256GB PCle SSD Win 10 NVIDIA GeForce MX250 Fingerprint Sensor Notebook
    220V/110V Fried Ice Machine With 6 Barrels Ice Cream Making Machine cupon banggood
    DJI Mavic Pro OcuSync Transmission FPV With 3Axis Gimbal 4K Camera Obstacle Avoidance RC Drone Quadcopter banggood romania
    DJI Mavic Air 4KM FPV w/ 3-Axis Gimbal 4K Camera 32MP Sphere Panoramas RC Foldable Drone Quadcopter www bangood com online
    MACWHEEL M30 23Ah 48V 500W Dual Motor Folding Electric Scooter With Saddle Color Display 35km/h Top Speed 150km Mileage Range 150KG Bearing analogie electricitate curgerea fluidelor analogie electricitate curgerea fluidelor banggood login
    110V/220V Folding Electric Wheelchair Mobility Old Elderly Disabled Portable Rollstuhl Scooter analogie electricitate curgerea fluidelor analogie electricitate curgerea fluidelor coupons from China
    ALIGN DONINATOR T-REX 550X 6CH 3D Flying RC Helicopter Super Combo With Motor Servo ESC Gyro' banggood cupon
    TRONXY® X5SA-500PRO Upgraded Aluminum 3D Printer 500*500*600mm Large Printing Size With Titan Extruder Ultra Quiet Mode OSG Dual Axis Guide laptop 15.6 inch intel banggood coupons
    Xiaomi Mi Air Laptop 2019 13.3 inch Intel Core i5-8250U 8GB RAM 256GB PCle SSD Win 10 NVIDIA GeForce MX250 Fingerprint Sensor Notebook coduri de reducere pentru Banggood
    24V/48V 1000W Low Wind Wind Generator Start Up Horizontal Residential Wind Turbine Generator cupon  gearbest
    Colorful iGame GeForce  RT X 2080 Super Advanced OC Graphics Card Video Graphics Card with Air Cooling Fan gearbest romania
    OnePlus 7T Pro Global Rom 6.67 inch 90Hz Fluid AMOLED Display HDR10+ Android 10 NFC 4085mAh 48MP Triple Rear Cameras 8GB RAM 256GB ROM UFS 3.0 Snapdragon 855 Plus Octa Core 2.96GHz 4G Smartphone madalin gearbest
    ONE-NETBOOk One Mix 3s Intel Core M3-8100Y 3.4GHz 16GB RAM 512GB PCI-E SSD 8.4 Inch Windows 10 Tablet coduri de reducere Banggood coduri de reducere Banggood madalin china gearbest
    Portable Folding Power Electric Wheelchairs Elderly Disabled gearbest com romania
    157x79x8inch Airtrack Gymnastics Mat Inflatable GYM Air Track Mat Gym Mat Tumbling Cheerleading Pad with Pump gearbest plata ramburs
    OnePlus 7 Pro Global Rom 6.67 Inch QHD+ AMOLED 90Hz HDR10+ 4000mAh NFC 48MP Rear Camera 8GB 256GB UFS 3.0 Snapdragon 855 4G Smartphone a intelege teoria electricitatii belgium registered gearbest
    Rovan WLT 2019 Starter Version 1/5 2.4G 4WD Rc Car 32cc 2 Stroke Gas Engine RTR Toy banggood promotion coupon Romania banggood promotion coupon Romania gearbest promotional code
    JCZK 300C 470L DFC 6CH 3D Three Blade Rotor TBR Super Simulation RC Helicopter RTF banggood promotion coupon Romania banggood promotion coupon Romania promotion coupon
    Outdoor Garden Yard 2.5m Inflating Zorb Ball Human Hamster Bumper Water Ball For Kids Adults a intelege teoria electricitatii promotion code 2020
    OnePlus 7 Pro 6.64 Inch QHD+ AMOLED 90Hz HDR10+ NFC 4000mAh 48MP Rear Camera 6GB 128GB UFS 3.0 Snapdragon 855 4G Smartphone coupon gearbest 2020
    a intelege teoria electricitatii gddr4 ram 512gb pcle
       

arduino and servo motor raspberry pi reddit esp8266 yun tutorial xloader

Citește și:

9V output heart code pret for robotics genuino board quiz yun vs uno

arduino and raspberry pi difference arduino qr code reader 9600 cost

Poți folosi următorul cupon de reducere pentru a obține discount la componente electronice:

arduino kit price oled yun shield 0-10v output 433mhz library 4-20ma input

Uprade Deals

Buy 3 Get 8% Off,

Buy 5 Get 18% Off

More Less
8%-18%
Expiră la: 01-04-2024
LinkedIn

arduino keyboard input joystick library oled I2C 2d array hardware button

Pentru alte cupoane de reducere apăsați aici

Arduino și Raspberry Pi news

  • Create a stop motion film with Digital Making at Home
    by Kevin Johnson (Raspberry Pi Blog – Raspberry Pi) on 8 August 2020

    Join us for Digital Making at Home: this week, young people can do stop motion and time-lapse animation with us! Through Digital Making at Home, we invite kids all over the world to code along with us and our new videos every week. So get your Raspberry Pi and Camera Module ready! We’re using them The post Create a stop motion film with Digital Making at Home appeared first on Raspberry Pi.

  • Processing raw image files from a Raspberry Pi High Quality Camera
    by David Plowman (Raspberry Pi Blog – Raspberry Pi) on 7 August 2020

    When taking photos, most of us simply like to press the shutter button on our cameras and phones so that viewable image is produced almost instantaneously, usually encoded in the well-known JPEG format. However, there are some applications where a little more control over the production of that JPEG is desirable. For instance, you may The post Processing raw image files from a Raspberry Pi High Quality Camera appeared first on Raspberry Pi.

  • Recreate Time Pilot’s free-scrolling action | Wireframe #41
    by Ryan Lambie (Raspberry Pi Blog – Raspberry Pi) on 6 August 2020

    Fly through the clouds in our re-creation of Konami’s classic 1980s shooter. Mark Vanstone has the code Arguably one of Konami’s most successful titles, Time Pilot burst into arcades in 1982. Yoshiki Okamoto worked on it secretly, and it proved so successful that a sequel soon followed. In the original, the player flew through five eras, The post Recreate Time Pilot’s free-scrolling action | Wireframe #41 appeared first on Raspberry Pi.

  • Raspberry Pi keyboards for Japan are here!
    by Simon Martin (Raspberry Pi Blog – Raspberry Pi) on 5 August 2020

    When we announced new keyboards for Portugal and the Nordic countries last month, we promised that you wouldn’t have to wait much longer for a variant for Japan, and now it’s here! Japanese Raspberry Pi keyboard The Japan variant of the Raspberry Pi keyboard required a whole new moulding set to cover the 83-key arrangement The post Raspberry Pi keyboards for Japan are here! appeared first on Raspberry Pi.

  • DSLR motion detection with Raspberry Pi and OpenCV
    by Ashley Whittaker (Raspberry Pi Blog – Raspberry Pi) on 4 August 2020

    One of our favourite makers, Pi & Chips (AKA David Pride), wanted to see if they could trigger a DSLR camera to take pictures by using motion detection with OpenCV on Raspberry Pi. You could certainly do this with a Raspberry Pi High Quality Camera, but David wanted to try with his swanky new Lumix The post DSLR motion detection with Raspberry Pi and OpenCV appeared first on Raspberry Pi.

  • Raspberry Pi won’t let your watched pot boil
    by Ashley Whittaker (Raspberry Pi Blog – Raspberry Pi) on 3 August 2020

    One of our favourite YouTubers, Harrison McIntyre, decided to make the aphorism “a watched pot never boils” into reality. They modified a tabletop burner with a Raspberry Pi so that it will turn itself off if anyone looks at it. In this project, the Raspberry Pi runs facial detection using a USB camera. If the The post Raspberry Pi won’t let your watched pot boil appeared first on Raspberry Pi.

  • Design game graphics with Digital Making at Home
    by Kevin Johnson (Raspberry Pi Blog – Raspberry Pi) on 1 August 2020

    Join us for Digital Making at Home: this week, young people can explore the graphics side of video game design! Through Digital Making at Home, we invite kids all over the world to code along with us and our new videos every week. So get ready to design video game graphics with us: Check out The post Design game graphics with Digital Making at Home appeared first on Raspberry Pi.

  • International Space Station Tracker | The MagPi 96
    by Rob Zwetsloot (Raspberry Pi Blog – Raspberry Pi) on 31 July 2020

    Fancy tracking the ISS’s trajectory? All you need is a Raspberry Pi, an e-paper display, an enclosure, and a little Python code. Nicola King looks to the skies Standing on his balcony one sunny evening, the perfect conditions enabled California-based astronomy enthusiast Sridhar Rajagopal to spot the International Space Station speeding by, and the seeds The post International Space Station Tracker | The MagPi 96 appeared first on Raspberry Pi.

  • Amazing science from the winners of Astro Pi Mission Space Lab 2019–20
    by Claire Given (Raspberry Pi Blog – Raspberry Pi) on 30 July 2020

    The team at Raspberry Pi and our partner ESA Education are pleased to announce the winning and highly commended Mission Space Lab teams of the 2019–20 European Astro Pi Challenge! Mission Space Lab sees teams of young people across Europe design, create, and deploy experiments running on Astro Pi computers aboard the International Space Station. The post Amazing science from the winners of Astro Pi Mission Space Lab 2019–20 appeared first on Raspberry Pi.

  • Gender balance in computing: current research
    by Sue Sentance (Raspberry Pi Blog – Raspberry Pi) on 29 July 2020

    We’ve really enjoyed starting a series of seminars on computing education research over the summer, as part of our strategy to develop research at the Raspberry Pi Foundation. We want to deepen our understanding of how young people learn about computing and digital making, in order to increase the impact of our own work and The post Gender balance in computing: current research appeared first on Raspberry Pi.

  • Raspberry Pi VPN Setup Guide
    by Matt (Raspberry Pi Spy) on 18 June 2020

    Setting up a Raspberry Pi VPN connection is easy. Once subscribed to a VPN service you can access the internet using it and protect your privacy. A VPN (Virtual Private Network) creates an encrypted tunnel between your computer and a remote server. All your internet traffic is routed through the tunnel and appears to the [...] The post Raspberry Pi VPN Setup Guide appeared first on Raspberry Pi Spy.

  • Adding Ethernet to a Pi Zero
    by Matt (Raspberry Pi Spy) on 20 May 2020

    The Pi Zero has no Ethernet port. If your project requires Ethernet you can add it using either an Ethernet module or a USB to Ethernet adapter. At this point someone is going to question why you would want to add Ethernet to a Pi Zero. Why not just use a standard Pi which already [...] The post Adding Ethernet to a Pi Zero appeared first on Raspberry Pi Spy.

Leave a Reply