After a laptop is discarded, often its power adapter is still intact. However, because they have become useless, most people don't keep them any more. We made some modifications to the adapter, so that it will have multiple USB outlets for mobile phones, mobile power bank, tablet PCs and other devices to charge. USB outlets on laptops usually have enough power to supply up to 8 mobile devices simultaneously. Thus, laptop power adaptors could be re-used in our daily life to continue to serve. In this way, we can reach the goal of re-using wasted electronic products.
Step 1: Material preparation
(1) laptop power adapter, advertised power of 90W, output voltage 19V
(2) 8 sets of voltage converter modules
(3) plexiglass plate
(4) copper pillars/studs, screws, pieces of wire, etc.