This week for homework in pcomp(physical computing) I had to create circuits that were powered by 12v converter. Then the 12 volts were then turned into 5 volts by a 7805 5v regulator. So far I have had no problems with any of labs, that is, until this one.
I can now honestly say I blew several LEDs and caused smoke to rise from them and I managed to destroy 3 voltage regulators. I also had the disadvantage of working on this lab without the diagrams on the server, due to it being offline.
However, I was able to understand the principles of measuring current and voltage, and working with a powersource other than the Arduino.
Here is a video of a simple circuit that I made.
Voltage Regulator and the Tower Switch!!! from Matt Richard on Vimeo.