{"id":16713,"date":"2021-05-20T16:41:16","date_gmt":"2021-05-20T20:41:16","guid":{"rendered":"https:\/\/scruss.com\/blog\/?p=16713"},"modified":"2021-05-20T18:05:35","modified_gmt":"2021-05-20T22:05:35","slug":"the-cheapest-micro-sd-card-interface-in-the-world","status":"publish","type":"post","link":"https:\/\/scruss.com\/blog\/2021\/05\/20\/the-cheapest-micro-sd-card-interface-in-the-world\/","title":{"rendered":"The cheapest Micro SD card interface in the world"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"575\" src=\"https:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2021\/05\/IMG_3109-1024x575.jpg\" alt=\"a micro-sd adapter with 7 0.1&quot;-pitch header pins  soldered onto its contacts\" class=\"wp-image-16714\" srcset=\"https:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2021\/05\/IMG_3109-1024x575.jpg 1024w, https:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2021\/05\/IMG_3109-320x180.jpg 320w, https:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2021\/05\/IMG_3109-160x90.jpg 160w, https:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2021\/05\/IMG_3109-768x431.jpg 768w, https:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2021\/05\/IMG_3109.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>micro-SD adapter + pins + solder = working SD interface<\/figcaption><\/figure>\n\n\n\n<p>It&#8217;s only a serial SPI interface, but you can&#8217;t beat the price. It should only be used with 3.3 V micro-controllers like the Raspberry Pi Pico, since micro-SD cards don&#8217;t like 5 V directly <span style=\"text-decoration: underline;\">at<\/span> <span style=\"text-decoration: underline;\">all<\/span>.<\/p>\n\n\n\n<p>You might want to pre-tin the pins and apply some extra flux on both surfaces, because these pads are thin and you don&#8217;t want to melt them. I used my standard SnAgCu lead-free solder without trouble, though.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"170\" height=\"64\" src=\"https:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2021\/05\/sd_pins.png\" alt=\"label sticker image for 7 pins, from left to right DO, GND, CLK, 3V3, GND, DI, CS\" class=\"wp-image-16717\" srcset=\"https:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2021\/05\/sd_pins.png 170w, https:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2021\/05\/sd_pins-160x60.png 160w\" sizes=\"auto, (max-width: 170px) 100vw, 170px\" \/><figcaption>got a label maker? This label&#8217;s the same length as an SD card is wide, as shown above.<br>Made entirely with <strong>netpbm<\/strong><\/figcaption><\/figure><\/div>\n\n\n\n<p>You only need to use one of the Ground connections for the card to work.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>It&#8217;s only a serial SPI interface, but you can&#8217;t beat the price. It should only be used with 3.3 V micro-controllers like the Raspberry Pi Pico, since micro-SD cards don&#8217;t like 5 V directly at all. You might want to pre-tin the pins and apply some extra flux on both surfaces, because these pads are [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"The cheapest Micro SD card interface in the world. Includes the SD Card label shown here","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[7],"tags":[2208,3273,3094,2260,809],"class_list":["post-16713","post","type-post","status-publish","format-standard","hentry","category-computers-suck","tag-electronics","tag-labels","tag-micropython","tag-microsd","tag-netpbm"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pQNZZ-4lz","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/posts\/16713","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/comments?post=16713"}],"version-history":[{"count":4,"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/posts\/16713\/revisions"}],"predecessor-version":[{"id":16719,"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/posts\/16713\/revisions\/16719"}],"wp:attachment":[{"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/media?parent=16713"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/categories?post=16713"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/tags?post=16713"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}