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diff --git a/_site/log/arduino-uno/index.html b/_site/log/arduino-uno/index.html deleted file mode 100644 index 3eee3a3..0000000 --- a/_site/log/arduino-uno/index.html +++ /dev/null @@ -1,108 +0,0 @@ -<!DOCTYPE html> -<html> - <head> - <meta charset="utf-8"> - <meta name="viewport" content="width=device-width, initial-scale=1"> - <title>ATmega328P at 3.3V and 5V</title> - <link rel="stylesheet" href="/assets/css/main.css"> - <link rel="stylesheet" href="/assets/css/skeleton.css"> -</head> - - - <body> - - <div id="nav-container" class="container"> - <ul id="navlist" class="left"> - - <li > - <a href="/" class="link-decor-none">hme</a> - </li> - <li > - <a href="/projects/" class="link-decor-none">poc</a> - </li> - <li > - <a href="/about/" class="link-decor-none">abt</a> - </li> - <li> - <a href="/cgi-bin/find.cgi" class="link-decor-none">lup</a> - </li> - <li> - <a href="/feed.xml" class="link-decor-none">rss</a> - </li> - </ul> -</div> - - - - <main> - <div class="container"> - <div class="container-2"> - <h2 class="center" id="title">ATMEGA328P AT 3.3V AND 5V</h2> - <h5 class="center">10 JUNE 2025</h5> - <br> - <div class="twocol justify"><p>Quick reference for wiring ATmega328P ICs at 5V and 3.3V. 5V uses 16MHz -crystal, 3.3V uses 8MHz.</p> - -<table style="border: none; width: 100%;"> - <tr style="border: none;"> - <td style="border: none; width: 50%; vertical-align: top;"> - <img src="pinout.png" alt="Pinout" style="width: 100%" /> - <p style="text-align: center;">Pinout</p> - </td> - <td style="border: none; width: 50%; vertical-align: top;"> - <img src="breadboard.jpeg" alt="Circuit" style="width: 100%" /> - <p style="text-align: center;">Breadboard</p> - </td> - </tr> -</table> - -<h2 id="5v-16mhz">5V-16MHz</h2> - -<p>Standard setup. How Arduino Uno boards are wired.</p> - -<p>Connections: Pin 1 → 5V via 10kΩ resistor. Pins 9/10 → 16MHz crystal via 22pF -capacitors to ground. Pins 7/20/21 → 5V supply. Pins 8/22 → ground. Add 0.1μF -decoupling caps between pins 7/20/21 and ground.</p> - -<p>Sample Makefile: <a href="Makefile">Makefile</a></p> - -<h2 id="33v-8mhz">3.3V-8MHz</h2> - -<p>Electrical connections identical to 5V circuit. Replace 5V with 3.3V supply, -16MHz crystal with 8MHz.</p> - -<p>Problem: ATmega328P ships configured for 5V. Must modify fuses (BOD level, -etc.) and replace bootloader. Standard Arduino bootloader expects 16MHz—needs -8MHz version.</p> - -<p>Solution: Use Arduino Uno as ISP. Upload ‘ArduinoISP’ sketch from Arduino IDE. -Connect SPI pins (ATmega328P ↔ Uno), Uno’s SS pin → ATmega328P RESET pin. Power -ATmega328P from Uno’s 5V pin during programming.</p> - -<p>Arduino IDE: Select ‘ATmega328P (3.3V, 8MHz)’ processor, ‘Arduino as ISP’ -programmer. Burn bootloader via tools menu.</p> - -<p>Sample Makefile (8MHz): <a href="3v3.Makefile">Makefile.3v3</a></p> - -<h2 id="remarks">Remarks</h2> - -<p>Don’t connect AREF (pin 21) to V<sub>cc</sub> if using ADC with internal 1.1V -or AV<sub>cc</sub> reference. See datasheet section 23.5.2.</p> - -</div> - <p class="post-author right">by W. D. Sadeep Madurange</p> - </div> - </div> - </main> - - <div class="footer"> - <div class="container"> - <div class="twelve columns right container-2"> - <p id="footer-text">© ASCIIMX - 2026</p> - </div> - </div> -</div> - - - </body> -</html> |