I am working on a first-project to convert my hand crank flashlight into a phone charger, i need a voltage regulator because i don't want to kill my phone, the one i'm looking at seems to fit my specifications however it says it is rated for 2 A, while my phone only needs 500 mA, i want to know if i can use it to charge my phone or if there is something else i should buy. When i crank the flashlight it should output only around 3 V and i need 5V 500 mA. I don't wanna risk damaging anything.
Voltage Regulator(buck DC/DC because its more efficient):
https://amzn.to/2I0Dl2m (concerned because it says booster, if i were to stop cranking and the voltage were to drop the phone would stop accepting charge, this would mean that the voltage would jump to an insanely high voltage and possibly burn/short my phone charging port.)
vs.
https://amzn.to/2HsHUBh (seems to have both capabilities but it is rated too high.)
HandCrank:
https://amzn.to/2JqbI1X
Voltage Regulator(buck DC/DC because its more efficient):
https://amzn.to/2I0Dl2m (concerned because it says booster, if i were to stop cranking and the voltage were to drop the phone would stop accepting charge, this would mean that the voltage would jump to an insanely high voltage and possibly burn/short my phone charging port.)
vs.
https://amzn.to/2HsHUBh (seems to have both capabilities but it is rated too high.)
HandCrank:
https://amzn.to/2JqbI1X