{"id":284,"date":"2014-02-08T21:24:34","date_gmt":"2014-02-08T21:24:34","guid":{"rendered":"http:\/\/burnt-traces.com\/?p=284"},"modified":"2014-03-27T04:45:44","modified_gmt":"2014-03-27T04:45:44","slug":"lipo-charger-recovered-from-portable-dvd-player","status":"publish","type":"post","link":"https:\/\/burnt-traces.com\/?p=284","title":{"rendered":"LiPo Charger Recovered from Portable DVD Player"},"content":{"rendered":"<p>Like most people, I love taking things apart. Usually I&#8217;m foolishly drawn to take things apart in order to reclaim parts for reuse later. However, it can be a chore to find reusable parts, especially in modern consumer electronics. I picked up a broken portable DVD player (GPX PD708B) from the Goodwill outlet store. They price hard goods at $.79 a pound, so usually it&#8217;a a cheap way to get stuff like this. Now, I had done this to remove the LCD and attempt to drive it, as a learning exercise for myself. Now, I hadn&#8217;t even looked that close at the unit until I brought it home. The first unexpected thing was that it contained a sizable 2000 mAh LiPo battery. That could definiately be re-purposed in a future experiment. As a nice supprise, I found that the charging circuit for the battery, was actually separate from the main board on its own little module. Awesome! Now I not only have a large LiPo battery, but a propery charger\/control circuit for it.<\/p>\n<p><a href=\"http:\/\/burnt-traces.com\/wp-content\/uploads\/2014\/02\/2014-02-07-18.43.58.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/burnt-traces.com\/wp-content\/uploads\/2014\/02\/2014-02-07-18.43.58-300x225.jpg\" alt=\"LiPo Charger\" width=\"300\" height=\"225\" class=\"alignnone size-medium wp-image-285\" srcset=\"https:\/\/burnt-traces.com\/wp-content\/uploads\/2014\/02\/2014-02-07-18.43.58-300x225.jpg 300w, https:\/\/burnt-traces.com\/wp-content\/uploads\/2014\/02\/2014-02-07-18.43.58-1024x768.jpg 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>It seems to be a complete unit with DC power input, battery power output, managed charging, battery protection, and an empty space to add a charge status LED. It appears to be run off an unmarked (at least I couldn&#8217;t see any markings) ATTiny micro. My only clue was the name on the silkscreen was &#8220;Lili-new-2Li-TINY13.&#8221; A little probing with my meter and scope found that the IC on the right of the board had 5V and ground in the right spots, pin 5 was outputting the &#8220;blinky&#8221; signal for the LED, and pin 6 was actually spitting out a 32 kHz PWM signal with about 30% duty cycle. See below for my brief examination of the board.<\/p>\n<p><a href=\"http:\/\/burnt-traces.com\/wp-content\/uploads\/2014\/02\/2014-02-07-18.43.58_labled.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/burnt-traces.com\/wp-content\/uploads\/2014\/02\/2014-02-07-18.43.58_labled-300x225.jpg\" alt=\"Labled Lipo Charger\" width=\"300\" height=\"225\" class=\"alignnone size-medium wp-image-286\" srcset=\"https:\/\/burnt-traces.com\/wp-content\/uploads\/2014\/02\/2014-02-07-18.43.58_labled-300x225.jpg 300w, https:\/\/burnt-traces.com\/wp-content\/uploads\/2014\/02\/2014-02-07-18.43.58_labled.jpg 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Always nice to actually find something useful.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Like most people, I love taking things apart. Usually I&#8217;m foolishly drawn to take things apart in order to reclaim parts for reuse later. However, it can be a chore to find reusable parts, especially in modern consumer electronics. I picked up a broken portable DVD player (GPX PD708B) from the Goodwill outlet store. They&hellip;&nbsp;<a href=\"https:\/\/burnt-traces.com\/?p=284\" class=\"\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">LiPo Charger Recovered from Portable DVD Player<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[3],"tags":[59,58,57],"class_list":["post-284","post","type-post","status-publish","format-standard","hentry","category-electronics","tag-charger","tag-lipo","tag-teardown"],"_links":{"self":[{"href":"https:\/\/burnt-traces.com\/index.php?rest_route=\/wp\/v2\/posts\/284","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/burnt-traces.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/burnt-traces.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/burnt-traces.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/burnt-traces.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=284"}],"version-history":[{"count":4,"href":"https:\/\/burnt-traces.com\/index.php?rest_route=\/wp\/v2\/posts\/284\/revisions"}],"predecessor-version":[{"id":333,"href":"https:\/\/burnt-traces.com\/index.php?rest_route=\/wp\/v2\/posts\/284\/revisions\/333"}],"wp:attachment":[{"href":"https:\/\/burnt-traces.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=284"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/burnt-traces.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=284"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/burnt-traces.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=284"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}