HOW TO – PC Power 12 V regulator circuit
Neelandan just posted up another great project, a 12v regulator circuit to power things from your PC–
“To safely power something from your PC, the attached loads have to be limited to a safe current in order to avoid the chance that a short circuit might cause inadvertent shutdown and damage to your data. This circuit can be used to safely bring out the 12V line from your computer to supply a limited amount of current to power external gadgets.” – Link.
More: continued here