So here's the plan, I have my MP3 player that runs off of a single AA battery. I am currently using it at work everyday so I am going to be going through batteries pretty quickly (even if they are rechargable). I decided I would make my own "battery" where I will use a 1.5V power supply (simple AC-DC converter) and just use a dowel rod to fit the battery shape and add on terminals that connect to the power supply. 1st off, this will work right?
Next, so I cant seem to find a power supply/cell phone charger/etc that has the right specs, so I thought, wouldn't it be fun to just make the damn thing. So say I do, what would be too much ripple voltage? 1mV? Less?
Also, what would be the best approach so that I could possibly add on a switch to change the output voltage? Whetstone, OPAMPs, what? Thanks for the help!
Next, so I cant seem to find a power supply/cell phone charger/etc that has the right specs, so I thought, wouldn't it be fun to just make the damn thing. So say I do, what would be too much ripple voltage? 1mV? Less?
Also, what would be the best approach so that I could possibly add on a switch to change the output voltage? Whetstone, OPAMPs, what? Thanks for the help!