How hard would that be?
I've never seen the back of a USB port before.
I need a way to keep my iPhone charged/ powered by the bike.
Good question. This could work for my phone and the car GPS.
Do you have a car charger for it? I found a cigarette lighter port that hooked into the battery tender...
Quote from: NAKID on May 27, 2009, 10:19:05 AM
Do you have a car charger for it? I found a cigarette lighter port that hooked into the battery tender...
I don't but I have hooked into the BT port before for things.
I could probably make something like that work if I bought a cigarette plug to USB. I already have a socket that I could wire up.
I'm just trying to keep things simple.
Which I'm not always good at ;D
usb's are only 5v. IIRC. a car charger and a cig lighter adapter would be best.
are you looking for a mini USB connection? try this from garmin
mini usb (http://garmn.factoryoutletstore.com/details/1697-7138/Garmin-Nuvi-Series-Power-Supplies-Cables-GUSB5V-B.html)
No, the full size USB...
oh, like this then
(http://www.l-com.com/product_images/detail/LG_ECJ504-UA.JPG)
try this place (http://www.l-com.com/familylist.aspx?id=190)
[thumbsup]
A usb connector pins out like this:
(http://i608.photobucket.com/albums/tt166/rose_guy/usb-a3.gif)
1 = +5V
2 = -data
3 = +data
4 = GND
Add a simple circuit that will regulate the 12V on the bike to 5 v
(http://i608.photobucket.com/albums/tt166/rose_guy/psu_5v.jpg)
viola. you have a charger.
ymmv
EDIT: You should put the regulator on a little bit of aluminium as a heat sink.
^
Cool!
I was resigned to wiring up a 12v socket and using a cigarette plug to usb adapter.
Which I may still do, but that stuff is pretty cool!
Rose_guy, thanks for the schematic. Could I use the same capacitors with a 7809 regulator? I want to power my old school garage door opener.
Scott
Quote from: scott_araujo on May 28, 2009, 06:52:17 PM
Rose_guy, thanks for the schematic. Could I use the same capacitors with a 7809 regulator? I want to power my old school garage door opener.
Scott
probably, the caps aren't really important for the output voltage they are there to control ripple if I recall. I haven't used these devices for years so I would prototype it. the data sheet actually has a 33uF input to ground and a .1uF output to ground. The schematic I got was from some other project hanging out on the hard drive that I never actually made. Remember to put a heat sink on it and keep it away from the hot bits on your motorcycle.
Again YMMV.
Yeah, I looked up some different schematics, doesn't appear to be too picky about the uF. Also, since I'm just using it to drive a 9V garage door opener that always draws the same current when working, I could probably just measure how much current it draws and figure out what size resistor I need to drop from 12V to 9V. Not nearly so fancy but pretty easy and probably more than good enough.
Thanks,
Scott