{"id":1304,"date":"2010-07-17T03:47:04","date_gmt":"2010-07-17T09:47:04","guid":{"rendered":"http:\/\/www.seeedstudio.com\/blog\/?p=1304"},"modified":"2010-07-29T19:32:19","modified_gmt":"2010-07-30T01:32:19","slug":"unstable-solar-charger-at-renovation","status":"publish","type":"post","link":"https:\/\/www.seeedstudio.com\/blog\/2010\/07\/17\/unstable-solar-charger-at-renovation\/","title":{"rendered":"Unstable Solar Charger at renovation"},"content":{"rendered":"<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-1322\" title=\"solar_fail\" src=\"\/wp-content\/uploads\/2010\/07\/solar_fail.jpg\" alt=\"\" width=\"500\" height=\"375\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2010\/07\/solar_fail.jpg 500w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2010\/07\/solar_fail-300x225.jpg 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2010\/07\/solar_fail-150x112.jpg 150w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/>It&#8217;s shocking that we found Solar Charger might have +\/-1V ripple while supplying 5V DC from Li-Po battery.The ripple varies according to the load, most project might run OK, but having high potentiality that ADC applications might have unstable read or other unexpected errors.<\/p>\n<p style=\"text-align: left;\"><!--more--><\/p>\n<p><strong>Possible Reason<\/strong><\/p>\n<p>External Charging Circuit for sp6641\u00a0does not meet requirement and caused huge ripple. Changed to AIC1896 and ripple is within 200mV<\/p>\n<p><strong>Solution: <\/strong><em>Please notify us (depot(at)seeedstudio.com) with Your order and address, and let us know if you like to\u00a0<strong>A) <\/strong>ship you free fixed replacement \u00a0<strong>or B)<\/strong> sell you the next generation charger with half price. (please help choose only one option if you bought multiple)<\/em><\/p>\n<p><em> <\/em>We are so sorry for such\u00a0irresponsible\u00a0Engineering! The next revision is planning. We would also revise it with better functionality.<\/p>\n<p><strong>Revision<\/strong><\/p>\n<p>It would be charging from AC(?-?, screw terminal) and DC (4.5-6.5V, JST 2 pin connector) supply.<\/p>\n<p>It would be able to charge normal 3.7v Li-Po with up to 500mA<\/p>\n<p>It would be output 5VDC to USB host<\/p>\n<p><em>Please let us know if you have any suggestions too, we will send out the prototypes as usual. Thanks!<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>It&#8217;s shocking that we found Solar Charger might have +\/-1V ripple while supplying 5V DC<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"iawp_total_views":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1304","post","type-post","status-publish","format-standard","hentry","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.0 - 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