{"id":13848,"date":"2025-04-07T21:17:43","date_gmt":"2025-04-07T15:47:43","guid":{"rendered":"https:\/\/johnsonfrancis.org\/techworld\/?p=13848"},"modified":"2025-04-07T21:43:57","modified_gmt":"2025-04-07T16:13:57","slug":"chips-and-other-components-on-my-arduino-uno-board","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/techworld\/chips-and-other-components-on-my-arduino-uno-board\/","title":{"rendered":"Chips and other components on my Arduino Uno board"},"content":{"rendered":"<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/0Fe-VLOQ3Lk?si=GxiG-ZtFaw3X9Tjk\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n\n<p class=\"wp-block-paragraph\">Let us have a look at the chips and some other components seen on the Arduino Uno board.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is the ATmega328 on the Arduino Uno board, about which I had posted earlier in connection with Arduino Nano and as a seperate post. It is an 8-bit microcontroller which has 32 KB flash memory. ATmega328 has a maximum CPU speed of 20 MHz.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The components marked 47 and 25V are surface mount capacitors of 47 microfarad capacity and working voltage 25V. LM358 is a low-power dual operational amplifier integrated circuit. As you can see, it is an 8 pin integrated circuit. The part labelled 662K is a low dropout (LDO) regulator for providing a stable voltage supply. It is rated for 3.3V, 250mA. MS1117 5.0 is a linear voltage regulator with low voltage drop. It can provide 5V regulated output with an unregulated 9V DC input. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">CH340C is a USB to serial converter chip. It is a full speed USB 2.0 device with baud rate 50 bps to 2 Mbps. Below that you can see a crystal oscillator, the inscription on which is not clear, though I tried visualization from various angles with different illuminations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The reset button near the USB type B port is seen here.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A1SHB is a P-Channel MOSFET.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is the underside of Arduino Uno board, with no chips seen.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Another crystal oscillator with the part number clearly seen, unlike the previous one on which the number was not clear.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This view shows both the crystal oscillators together. LEDs in a vertical row can be seen marked as ON, RX, XT and L. ON will light up with power on, RX and XT during data transmission and L blinks while power is on and the blinking rate can be controlled by programming, as with Arduino Nano.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ON and L LEDs have been captured in on position after connecting a USB power bank using a Type A to Type B USB cable.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Let us have a look at the chips and some other components seen on the Arduino Uno board. This is the ATmega328 on the Arduino Uno board, about which I had posted earlier in connection with Arduino Nano and as a seperate post. It is an 8-bit microcontroller which has 32 KB flash memory. ATmega328 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":13857,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-13848","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-amateur-radio-ham-radio"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Chips and other components on my Arduino Uno board - Johnson&#039;s Techworld<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/johnsonfrancis.org\/techworld\/chips-and-other-components-on-my-arduino-uno-board\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Chips and other components on my Arduino Uno board - Johnson&#039;s Techworld\" \/>\n<meta property=\"og:description\" content=\"Let us have a look at the chips and some other components seen on the Arduino Uno board. This is the ATmega328 on the Arduino Uno board, about which I had posted earlier in connection with Arduino Nano and as a seperate post. It is an 8-bit microcontroller which has 32 KB flash memory. ATmega328 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/johnsonfrancis.org\/techworld\/chips-and-other-components-on-my-arduino-uno-board\/\" \/>\n<meta property=\"og:site_name\" content=\"Johnson&#039;s Techworld\" \/>\n<meta property=\"article:published_time\" content=\"2025-04-07T15:47:43+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-04-07T16:13:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2025\/04\/Chips-and-other-components-on-my-Arduino-Uno-board.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"677\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Johnson Francis\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Johnson Francis\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/chips-and-other-components-on-my-arduino-uno-board\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/chips-and-other-components-on-my-arduino-uno-board\\\/\"},\"author\":{\"name\":\"Johnson Francis\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/#\\\/schema\\\/person\\\/6201c843e80ccd3578e6196b1d007027\"},\"headline\":\"Chips and other components on my Arduino Uno board\",\"datePublished\":\"2025-04-07T15:47:43+00:00\",\"dateModified\":\"2025-04-07T16:13:57+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/chips-and-other-components-on-my-arduino-uno-board\\\/\"},\"wordCount\":327,\"publisher\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/#\\\/schema\\\/person\\\/6201c843e80ccd3578e6196b1d007027\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/chips-and-other-components-on-my-arduino-uno-board\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/wp-content\\\/uploads\\\/2025\\\/04\\\/Chips-and-other-components-on-my-Arduino-Uno-board.jpg\",\"articleSection\":[\"Amateur Radio (Ham Radio)\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/chips-and-other-components-on-my-arduino-uno-board\\\/\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/chips-and-other-components-on-my-arduino-uno-board\\\/\",\"name\":\"Chips and other components on my Arduino Uno board - 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