13 more posts in this thread. [Missing image file: 1358348529688.jpg]
So, my cell phone has a warranty that's about to go. If it beaks with no signs of physical damage and isn't something easily replaceable like a broken battery they'll replace it with minimal inspection. I want to take advantage of this, how can I break my phone? There might be signs of it being tampered with if I open it up and do something, so I'm thinking I could send a large voltage into the USB to Killian but I saw a thread about this a while ago, all of you guys said it'd just kill a part of the mobo. So, could I use a strong alternating electromagnet to induce current in the circuitry and destroy it, yeah? What currents in the magnet would I be looking at? Would it even work?
20 more posts in this thread. [Missing image file: linear power supply.png]
I'm making a linear power supply for a college project, and I intend to keep it and use it later, so I wanted to invest some time in it (but not that much money) to make it a little more secure.
It'll be a simple 12V 1A power supply, but the test is to whistand a 5 ohm resistor load at full 1 amp.
You can see I added a fuse and a varistor before the transformer, and I'd like to add a diode
(D1) to protect against reverse voltage, but I skipped that class....how should I do it?