I want to build an electronic music box. I want to drive a portable CD player with a hand-cranked dynamo. My general idea is to use the dynamo from a hand cranked flashlight, connected to super capacitors and then to the CD player through a voltage regulator. The CD player normally takes 2 AA batteries.
My ideal case is to crank and charge the capacitors, then press a button to start the CD player. The player needs to run for approx. 3 minutes.
If this run time is too long, it would be OK to crank again during the 3 minutes, as long as the CD plays uninterrupted.
It would be nice if there was some kind of LED indicator for adequate charge, or a warning that additional charging is necessary.
I know a little about electronics, but the dynamo-capacitor combination is out of my range. Right now, I'm looking for feedback about whether this is possible or not, and what kind of measurements do I need to take to figure out if this is possible.
Thanks in advance for any input.
My ideal case is to crank and charge the capacitors, then press a button to start the CD player. The player needs to run for approx. 3 minutes.
If this run time is too long, it would be OK to crank again during the 3 minutes, as long as the CD plays uninterrupted.
It would be nice if there was some kind of LED indicator for adequate charge, or a warning that additional charging is necessary.
I know a little about electronics, but the dynamo-capacitor combination is out of my range. Right now, I'm looking for feedback about whether this is possible or not, and what kind of measurements do I need to take to figure out if this is possible.
Thanks in advance for any input.