The Ultimate 555 Tester Here are the schematic and the 3D-printing files ffrom the 555 tester published on Youtube on December 1st 2020. YouTube Video 555-testerDownload Share this: Share on WhatsApp (Opens in new window) WhatsApp Email a link to a friend (Opens in new window) Email Print (Opens in new window) Print Share on Reddit (Opens in new window) Reddit TweetShare on TumblrPocket Share on Telegram (Opens in new window) Telegram Like Loading...