Hi,
I recently decided im too fat so i bought a bike to excersize, but then i got to thinking, why not build a bunch of stuff for it as well!
Im presently unemployed and bored out of my mind so i need something to do that serves a function.
Now, heres what i eventually want the bike to have,
An generator which can also serve as an electrical assist (if i need it for whatever reason), though its easy enough done with the right gearbox.
regulated 12v 5v and 3v rails which can be used all over the bike, the 5v and 3v being stepped down instead of just trimmed and regulated so as to conserve power and allow for higher current flow, a bunch of flashing lights for night use, a high powered light set, (i have a 10v 1A led and several 1W ones that run only on 3v), Numerous USB ports all over the bike to charge my phone, ipod and other random devices i may have a, a solar charger to charge the battery in the event the generator breaks, appropriately a regulator for the generator and lastly, a huge Asterics Li-Ion Battery like 10-20A, or otherwise a 12v SLA as big as i can fit on the bike. Being for excersize purposes, heavier is better so the battery will just be the highest capacity battery i can find that will fit on the bike and cost under $150.
For most of this im pretty much set, but there are a few things i need help and advice on, the first and foremost are the usb power rails and the the generators regulator.
With the generators regulator i want to get roughly 12-13v out at all times to power a battery charger, i can ensure that the motor rpm is always high enough that it a good deal of voltage out of it will be high enough to use directly, but how should i be handling this power so its fit for the charger circuit? i want to get maximum efficiency out of it and waste as little as possible.
Also, with the usb ports i bought a 15W stepdown converter that converts the 12v down pretty efficiently, what should i do to this 5v (max 3A), should i just hook it up to 3 parallel usb ports just like that or is there any circuitry that needs to be added like individual regulators and such.
any help with those or other parts of the bikes electrics would be greatly appreciated.
I recently decided im too fat so i bought a bike to excersize, but then i got to thinking, why not build a bunch of stuff for it as well!
Im presently unemployed and bored out of my mind so i need something to do that serves a function.
Now, heres what i eventually want the bike to have,
An generator which can also serve as an electrical assist (if i need it for whatever reason), though its easy enough done with the right gearbox.
regulated 12v 5v and 3v rails which can be used all over the bike, the 5v and 3v being stepped down instead of just trimmed and regulated so as to conserve power and allow for higher current flow, a bunch of flashing lights for night use, a high powered light set, (i have a 10v 1A led and several 1W ones that run only on 3v), Numerous USB ports all over the bike to charge my phone, ipod and other random devices i may have a, a solar charger to charge the battery in the event the generator breaks, appropriately a regulator for the generator and lastly, a huge Asterics Li-Ion Battery like 10-20A, or otherwise a 12v SLA as big as i can fit on the bike. Being for excersize purposes, heavier is better so the battery will just be the highest capacity battery i can find that will fit on the bike and cost under $150.
For most of this im pretty much set, but there are a few things i need help and advice on, the first and foremost are the usb power rails and the the generators regulator.
With the generators regulator i want to get roughly 12-13v out at all times to power a battery charger, i can ensure that the motor rpm is always high enough that it a good deal of voltage out of it will be high enough to use directly, but how should i be handling this power so its fit for the charger circuit? i want to get maximum efficiency out of it and waste as little as possible.
Also, with the usb ports i bought a 15W stepdown converter that converts the 12v down pretty efficiently, what should i do to this 5v (max 3A), should i just hook it up to 3 parallel usb ports just like that or is there any circuitry that needs to be added like individual regulators and such.
any help with those or other parts of the bikes electrics would be greatly appreciated.