{"id":2338,"date":"2021-09-27T18:45:52","date_gmt":"2021-09-27T18:45:52","guid":{"rendered":"https:\/\/mc.scsiraidguru.com\/?page_id=2338"},"modified":"2024-01-09T19:48:26","modified_gmt":"2024-01-09T19:48:26","slug":"ard_pwm","status":"publish","type":"page","link":"https:\/\/mc.scsiraidguru.com\/index.php\/arduino\/ard_pwm\/","title":{"rendered":"ard_pwm"},"content":{"rendered":"\t\t
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analogWrite will never go below 0V or above 5V.\u00a0 It will be a square wave with a certain duty cycle of 0 to 100 %..\u00a0\u00a0\u00a0 Once I get my oscilloscope I will post pictures.\u00a0<\/p>

127 : 50%:\u00a0 05050505050505….<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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The commands I used were different than what I will use with Arduino.\u00a0 Arduino does have analog pins.\u00a0\u00a0 They also have a digital pins with a ~ (tilde) next to them for PWM.\u00a0 You can use analogWrite command. Now the difference is Arduino uses 0 to 255 or an 8 bit value for PWM.<\/p>

0 = low = 0 volts
255 =\u00a0 high = 5V volts<\/p>

To do a 50% duty cycle you will use 127, which is about 1\/2 of 255.\u00a0\u00a0 My example will use pin ~9.\u00a0 I guess you could use 128.\u00a0<\/p>

int ledRed = 9;
int dutyCycle = 127;<\/p>

\u00a0void setup() {
\u00a0\u00a0\u00a0 analogWrite(ledRed, dutyCycle)
}<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Checkout my ard_motor_pwm project in the menu for a short video.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Date: 1.28.2022
First use of Siglent SDS1104X-E 100 MHz 4 Channel Oscilloscope using Arduino PWM signal.<\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\/\/ By Michael A. McKenney
\/\/ Arduino PWM
\/\/Date: 2.28.22

#include 
int PWM_IO = 6;

void setup() {
Serial.begin(9600);
Wire.begin(0x4); \/\/ join i2c bus with address #4
pinMode(6, OUTPUT);
}

void loop() {
analogWrite(PWM_IO, 0); 
}<\/pre>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\/\/ By Michael A. McKenney
\/\/ Arduino PWM
\/\/Date: 2.28.22

#include <Wire.h>
int PWM_IO = 6;

void setup() {
Serial.begin(9600);
Wire.begin(0x4); \/\/ join i2c bus with address #4
pinMode(6, OUTPUT);
}

void loop() {
analogWrite(PWM_IO, 64); 
}<\/pre>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\/\/ By Michael A. McKenney
\/\/ Arduino PWM
\/\/Date: 2.28.22

#include <Wire.h>
int PWM_IO = 6;

void setup() {
Serial.begin(9600);
Wire.begin(0x4); \/\/ join i2c bus with address #4
pinMode(6, OUTPUT);
}

void loop() {
analogWrite(PWM_IO, 128); 
}<\/pre>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\/\/ By Michael A. McKenney
\/\/ Arduino PWM
\/\/Date: 2.28.22

#include <Wire.h>
int PWM_IO = 6;

void setup() {
Serial.begin(9600);
Wire.begin(0x4); \/\/ join i2c bus with address #4
pinMode(6, OUTPUT);
}

void loop() {
analogWrite(PWM_IO, 192); 
}<\/pre>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\/\/ By Michael A. McKenney
\/\/ Arduino PWM
\/\/Date: 2.28.22

#include <Wire.h>
int PWM_IO = 6;

void setup() {
Serial.begin(9600);
Wire.begin(0x4); \/\/ join i2c bus with address #4
pinMode(6, OUTPUT);
}

void loop() {
analogWrite(PWM_IO, 255); 
}<\/pre>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"
analogWrite will never go below 0V or above 5V.\u00a0 It will be a square wave with a certain duty cycle of 0 to 100 %..\u00a0\u00a0\u00a0 Once I get my oscilloscope I will post pictures.\u00a0 127 : 50%:\u00a0 05050505050505…. The commands I used were different than what I will use with Arduino.\u00a0 Arduino does have analog […]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":235,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"0","ocean_second_sidebar":"0","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"custom","ocean_center_header_left_menu":"0","ocean_custom_header_template":"7119","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"0","ocean_menu_typo_font_family":"0","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"0","osh_disable_topbar_sticky":"default","osh_disable_header_sticky":"default","osh_sticky_header_style":"default","osh_sticky_header_effect":"","osh_custom_sticky_logo":0,"osh_custom_retina_sticky_logo":0,"osh_custom_sticky_logo_height":0,"osh_background_color":"","osh_links_color":"","osh_links_hover_color":"","osh_links_active_color":"","osh_links_bg_color":"","osh_links_hover_bg_color":"","osh_links_active_bg_color":"","osh_menu_social_links_color":"","osh_menu_social_hover_links_color":"","footnotes":""},"class_list":["post-2338","page","type-page","status-publish","hentry","entry"],"yoast_head":"\nard_pwm -<\/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:\/\/mc.scsiraidguru.com\/index.php\/arduino\/ard_pwm\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ard_pwm -\" \/>\n<meta property=\"og:description\" content=\"analogWrite will never go below 0V or above 5V.\u00a0 It will be a square wave with a certain duty cycle of 0 to 100 %..\u00a0\u00a0\u00a0 Once I get my oscilloscope I will post pictures.\u00a0 127 : 50%:\u00a0 05050505050505…. The commands I used were different than what I will use with Arduino.\u00a0 Arduino does have analog […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mc.scsiraidguru.com\/index.php\/arduino\/ard_pwm\/\" \/>\n<meta property=\"article:modified_time\" content=\"2024-01-09T19:48:26+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:1024\/h:543\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2022\/02\/arduino_pwm_0.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/index.php\\\/arduino\\\/ard_pwm\\\/\",\"url\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/index.php\\\/arduino\\\/ard_pwm\\\/\",\"name\":\"ard_pwm -\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/index.php\\\/arduino\\\/ard_pwm\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/index.php\\\/arduino\\\/ard_pwm\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\/\\/mc.scsiraidguru.com\\/wp-content\\/uploads\\/2022\\/02\\/arduino_pwm_0-1024x543.jpg\",\"datePublished\":\"2021-09-27T18:45:52+00:00\",\"dateModified\":\"2024-01-09T19:48:26+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/index.php\\\/arduino\\\/ard_pwm\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/mc.scsiraidguru.com\\\/index.php\\\/arduino\\\/ard_pwm\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/index.php\\\/arduino\\\/ard_pwm\\\/#primaryimage\",\"url\":\"https:\\/\\/mc.scsiraidguru.com\\/wp-content\\/uploads\\/2022\\/02\\/arduino_pwm_0.jpg\",\"contentUrl\":\"https:\\/\\/mc.scsiraidguru.com\\/wp-content\\/uploads\\/2022\\/02\\/arduino_pwm_0.jpg\",\"width\":1898,\"height\":1007},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/index.php\\\/arduino\\\/ard_pwm\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Arduino\",\"item\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/index.php\\\/arduino\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"ard_pwm\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/#website\",\"url\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/\",\"name\":\"SCSIraidGURU MC World\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/#\\\/schema\\\/person\\\/f21e3238456a7c2adea5944cb376cddc\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\\\/\\\/mc.scsiraidguru.com\\\/#\\\/schema\\\/person\\\/f21e3238456a7c2adea5944cb376cddc\",\"name\":\"Michael McKenney\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\/\\/mc.scsiraidguru.com\\/wp-content\\/uploads\\/2021\\/09\\/20210925_105558.jpg\",\"url\":\"https:\\/\\/mc.scsiraidguru.com\\/wp-content\\/uploads\\/2021\\/09\\/20210925_105558.jpg\",\"contentUrl\":\"https:\\/\\/mc.scsiraidguru.com\\/wp-content\\/uploads\\/2021\\/09\\/20210925_105558.jpg\",\"width\":2560,\"height\":1440,\"caption\":\"Michael McKenney\"},\"logo\":{\"@id\":\"https:\\/\\/mc.scsiraidguru.com\\/wp-content\\/uploads\\/2021\\/09\\/20210925_105558.jpg\"},\"sameAs\":[\"http:\\\/\\\/mc.scsiraidguru.com\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"ard_pwm -","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/mc.scsiraidguru.com\/index.php\/arduino\/ard_pwm\/","og_locale":"en_US","og_type":"article","og_title":"ard_pwm -","og_description":"analogWrite will never go below 0V or above 5V.\u00a0 It will be a square wave with a certain duty cycle of 0 to 100 %..\u00a0\u00a0\u00a0 Once I get my oscilloscope I will post pictures.\u00a0 127 : 50%:\u00a0 05050505050505…. The commands I used were different than what I will use with Arduino.\u00a0 Arduino does have analog […]","og_url":"https:\/\/mc.scsiraidguru.com\/index.php\/arduino\/ard_pwm\/","article_modified_time":"2024-01-09T19:48:26+00:00","og_image":[{"url":"https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:1024\/h:543\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2022\/02\/arduino_pwm_0.jpg","type":"","width":"","height":""}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/mc.scsiraidguru.com\/index.php\/arduino\/ard_pwm\/","url":"https:\/\/mc.scsiraidguru.com\/index.php\/arduino\/ard_pwm\/","name":"ard_pwm 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