{"id":983,"date":"2010-04-09T03:06:36","date_gmt":"2010-04-09T09:06:36","guid":{"rendered":"http:\/\/www.seeedstudio.com\/blog\/?p=983"},"modified":"2014-07-16T16:56:29","modified_gmt":"2014-07-16T08:56:29","slug":"seeed-wiznet-shield-issue","status":"publish","type":"post","link":"https:\/\/www.seeedstudio.com\/blog\/2010\/04\/09\/seeed-wiznet-shield-issue\/","title":{"rendered":"Seeed Wiznet Shield issue"},"content":{"rendered":"

Issue:<\/strong> Potential problem for Seeed Wiznet Shield power supply<\/p>\n

Root cause: <\/strong>Mistakenly used AMS1117-5 instead of\u00a0AMS1117-3.3 during production<\/p>\n

Coincidence: <\/strong>The design was to use AMS1117-3.3 to provide 3.3V from 5V, but AMS1117-5 is mistakenly used. The 5V input does not meet requirement from AMS1117-5, it\u00a0coincidently output around 3.4V and made the whole board working fine and passed our validation and test.<\/p>\n

Severity: mild. <\/span><\/strong>The boards are all tested and proven working, only 2 out of 300 are reported faulty and are not confirmed AMS1117-5 issue. However, there is possibility that the board might fail or working unstable in certain applications.<\/p>\n

Follow up: <\/strong>We will extend all wiznet shield warranty to 3 years including free change. If you are feeling uncomfortable \u00a0in continue using the board, please send a mail including your order number and address to wiznetissue{at}seeedstudio.com for:<\/p>\n

1) Send back the board with mistaken IC for replacement<\/p>\n

2) Ask \u00a0for \u00a0a replacement AMS1117-3.3 if you are OK with the soldering<\/p>\n

Thanks\u00a0douwehomans<\/em><\/strong> for pointing this out on our forum http:\/\/www.seeedstudio.com\/forum\/viewtopic.php?f=4&t=688<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Issue: Potential problem for Seeed Wiznet Shield power supply Root cause: Mistakenly used AMS1117-5 instead<\/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":[88],"class_list":["post-983","post","type-post","status-publish","format-standard","hentry","category-news","tag-wiznet"],"yoast_head":"\nSeeed Wiznet Shield issue - 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