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— independent official CAD\u002Fschematic\u002Fpinout\u002Fphoto review; no bench test","Rev3e portrait x=CADy,y=CADx.44header contacts incl both processor ICSP headers; exact native USB-B and DC-jack overhang. CAD mechanical\u002Fsource hash manifest in docs\u002Fverification\u002Fcatalog\u002F2026-10-16-board-drafts.md.",{"id":42,"name":43,"manufacturer":43,"ecosystem":43,"descriptionKey":1260},"families.arduino.description",[1262,1265,1271,1275,1278,1281],{"id":46,"publisher":43,"title":19,"documentType":1263,"version":1264,"url":20,"accessedDate":54},"reference_manual","2022-10-06",{"id":47,"publisher":1266,"title":1267,"documentType":1268,"version":1269,"url":1270,"accessedDate":54},"Microchip Technology","ATmega328P 8-bit AVR Microcontroller Datasheet","datasheet","DS40002061B","https:\u002F\u002Fww1.microchip.com\u002Fdownloads\u002FaemDocuments\u002Fdocuments\u002FMCU08\u002FProductDocuments\u002FDataSheets\u002FATmega48A-PA-88A-PA-168A-PA-328-P-DS-DS40002061B.pdf",{"id":48,"publisher":43,"title":1272,"documentType":1273,"version":1274,"url":28,"accessedDate":54},"Arduino Uno Rev3 Schematic (A000066)","schematic","Rev3",{"id":49,"publisher":43,"title":1276,"url":1277,"documentType":1263,"accessedDate":54},"Arduino Uno through-hole Rev3e Eagle CAD","https:\u002F\u002Fdocs.arduino.cc\u002Fstatic\u002F6bb7a3ca51ebee82a252f60c0b418787\u002FA000066-cad-files.zip",{"id":50,"publisher":43,"title":1279,"url":1280,"documentType":1263,"accessedDate":54},"Arduino AVR Core standard variant pin mapping","https:\u002F\u002Fgithub.com\u002Farduino\u002FArduinoCore-avr\u002Fblob\u002Fmaster\u002Fvariants\u002Fstandard\u002Fpins_arduino.h",{"id":51,"publisher":43,"title":1282,"url":36,"documentType":1268,"accessedDate":54},"Arduino UNO R3 board datasheet",[1284,1287,1290,1293],{"slug":1285,"name":1286},"arduino-nano-classic","Arduino Nano Classic",{"slug":1288,"name":1289},"arduino-pro-mini","Arduino Pro Mini",{"slug":1291,"name":1292},"arduino-mega-2560","Arduino Mega 2560 Rev3",{"slug":1294,"name":1295},"arduino-pro-micro","Arduino Pro Micro",[],[1083],{"title":1299,"description":1300,"card":1301,"intro":1302,"safe":1303,"adc":1304,"interfaces":1305,"strapping":1306,"input":1307,"overview":1308},"Розпіновка Arduino Uno R3 (ATmega328P)","Повна інтерактивна схема розпіновки та електричні характеристики Arduino Uno R3. Мікроконтролер ATmega328P, 5V логіка, 14 цифрових I\u002FO, 6 PWM, 6 АЦП.","Класична 5V плата розробника на ATmega328P у DIP-28 сокеті з 14 цифровими I\u002FO та 6 аналоговими входами.","Arduino Uno R3 працює на ATmega328P з логікою 5 V і частотою 16 MHz. Основний мікроконтролер тактується керамічним резонатором; окремий кварцовий резонатор тактує USB-міст ATmega16U2.","Arduino вказує максимум 20 mA на вивід I\u002FO. Для ATmega328P значення 40 mA на I\u002FO і 200 mA через VCC\u002FGND — абсолютні максимуми, а не робочі орієнтири; діють також сумарні обмеження груп портів.","Контакти A0-A5 забезпечують 10-бітне аналогово-цифрове перетворення (0-1023) відносно 5 В (або AREF). Контакти A4 (SDA) та A5 (SCL) мультиплексуються з шиною I2C.","UART на D0 (RX) та D1 (TX). SPI на D10 (SS), D11 (MOSI), D12 (MISO), D13 (SCK) та 6-піновому розʼємі ICSP. I2C на A4 (SDA) та A5 (SCL).","Страппінг-піни відсутні. D13 підключено до вбудованого світлодіода. D0\u002FD1 звʼязані з конвертером USB-UART (ATmega16U2).","Усі цифрові піни підтримують двонаправлений ввід\u002Fвивід із підтягувальними резисторами (20-50 кОм). Аналогові піни A0-A5 можуть працювати як цифрові GPIO 14-19.",{"summary":1309,"power":1310,"notes":1314,"useCases":1318,"before":1322,"variants":1326,"blueprint":1330},"Arduino Uno R3 — базова 8-бітна плата розробника на Microchip ATmega328P. Має стандартні гребінки для шилдів із кроком 0.1\" (2,54 мм), логіку 5 В, знімний мікроконтролер у сокеті DIP-28 та вбудований міст USB-UART на ATmega16U2.",{"usb":1311,"vin":1312,"five":1313},"Розʼєм USB Type-B (5 В DC, захищений самовідновлюваним запобіжником 500 мА)","VIN або роз’єм DC 2,1 mm із плюсом у центрі: рекомендовано 7–12 V; граничний діапазон входу плати 6–20 V. Доступний струм обмежується нагріванням стабілізатора.","Вивід 5 V з’єднаний із шиною живлення плати. Доступний струм залежить від джерела, температури стабілізатора й навантажень на платі; номінал стабілізатора не гарантує такий струм на виході плати. Для виводу 3,3 V вказано 50 mA.",{"logic":1315,"current":1316,"bootloader":1317},"GPIO працюють із логікою 5 V. Перед під’єднанням виходу 5 V перевірте допустиму напругу входу іншого пристрою; для входів лише 3,3 V може знадобитися перетворення рівнів.","Проєктуйте навантаження нижче межі плати 20 mA на I\u002FO та враховуйте сумарні струми груп портів. Абсолютні максимуми 40 mA на I\u002FO і 200 mA через VCC\u002FGND не гарантують нормальної роботи.","Попередньо прошито завантажувач Optiboot (115200 бод); прошивка завантажується через D0 (RX) та D1 (TX) з автоскиданням через DTR-конденсатор.",{"education":1319,"prototyping":1320,"shields":1321},"Навчання основам електроніки, програмування та робототехніки.","Швидке макетування з використанням стандартних макетних плат і перемичок 2,54 мм.","Сумісні модулі розширення (Arduino Uno R3 Shields).",{"logic":1323,"current":1324,"aref":1325},"Переконайтеся, що підключені сенсори та модулі підтримують логічні рівні 5 В.","Перед під’єднанням навантажень перевірте струм кожного виводу та груп портів. Для двигунів, реле й інших навантажень понад можливості GPIO використовуйте зовнішні драйвери.","Не подавайте на вивід AREF напругу вище 5 В та не підключайте зовнішнє джерело, якщо викликано analogReference(INTERNAL).",{"dip":1327,"r4":1328,"bridge":1329},"Uno R3 з наскрізним монтажем має змінний ATmega328P-PU. Uno R3 SMD відрізняється корпусом мікроконтролера й компонуванням; тут зображено версію з наскрізним монтажем.","UNO R4 Minima та UNO R4 WiFi — окремі плати на Renesas. Розпіновка мікроконтролера й обмеження струму Uno R3 для них не застосовні.","Сумісні плати можуть мати інший USB-міст або роз’єм. Перевірте схему та драйвер саме своєї плати; показаний ICSP1 для ATmega16U2 є не в кожного клона.","Модель побудована за офіційним Eagle CAD Arduino A000066 through-hole Rev3e: ATmega328P у панельці, USB-міст ATmega16U2 і два окремі шестиконтактні ICSP. Показано 44 фізичні контакти роз’ємів, включно з повторними сигналами та живленням.",1793836403417]