How do I use an old 19v laptop transformer for a laptop that needs 18.5v? Answered
The title pretty much says it all, I have power 'brick' that is sitting unused in a drawer that has an output of 19v and 3.95A. The brick that came with the laptop I want to use this on has an output of 18.5v and 3.5A. I want to modify the older one so that it can be used at home, or as a backup, and the one that came with the laptop will continue as the primary supply when at work and on the go. Would it be as simple as adding a resistor(s), or am I going to need to figure out voltage regulators and capacitors? I kinda fall into the category of being experienced, but untrained...I can follow directions and do the work, but the more research I do, the more confused I get.