Re: [WIRELESS-LAN] Wireless in a truck
Check out http://www.powerwerx.com/batteries-chargers/ I've used products from this company for a few projects and have always been happy. Look at either a battery separator or battery isolator and, as Jonathan recommended, use a separate battery with the AH rating you need for your project. Be careful about what you hook up to a car power system, 12 volts doesn't always mean 12 volts. You will see a swing of +- 25% between when the battery is low and what the alternator puts out. Either check to make sure that the gear you're hooking up is happy with a large range, or take extra steps to smooth out the power. Ham radio folks have been running RF gear in cars for decades now. See what resources you can dig up with that in mind. -Luke =-=-=-=-=-=-=-=-=-=-=-= Luke Jenkins Network Engineer Weber State University On Nov 5, 2012, at 4:24 AM, Jonathan Gazeley wrote: > On 02/11/12 20:33, Chuck Enfield wrote: >> Seems to me the power supply in the truck is your best bet. The router >> probably runs on DC at relatively low power compared to something like a >> car stereo, and the truck's battery would make as good an all-weather UPS >> as anything I can think of. > > I don't have any direct experience running wireless in a truck, but I do > frequently run a motorised telescope from a car battery in remote locations. > I would advise against running anything directly from the truck's battery in > case you over-discharge it and are unable to start the engine again. > > Either use a deep-cycle leisure battery (which can be charged from the engine > when running, but kept separate from the main vehicle battery when > discharging) or if you really want to run off the main battery, include some > electronics that will prevent over-discharge. > > You can find these kind of systems in motorhomes - perhaps ask a motorhome > service centre about getting this kind of circuit put into your truck. > > Cheers, > Jonathan > > ** > Participation and subscription information for this EDUCAUSE Constituent > Group discussion list can be found at http://www.educause.edu/groups/. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] Wireless in a truck
On 02/11/12 20:33, Chuck Enfield wrote: Seems to me the power supply in the truck is your best bet. The router probably runs on DC at relatively low power compared to something like a car stereo, and the truck's battery would make as good an all-weather UPS as anything I can think of. I don't have any direct experience running wireless in a truck, but I do frequently run a motorised telescope from a car battery in remote locations. I would advise against running anything directly from the truck's battery in case you over-discharge it and are unable to start the engine again. Either use a deep-cycle leisure battery (which can be charged from the engine when running, but kept separate from the main vehicle battery when discharging) or if you really want to run off the main battery, include some electronics that will prevent over-discharge. You can find these kind of systems in motorhomes - perhaps ask a motorhome service centre about getting this kind of circuit put into your truck. Cheers, Jonathan ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
RE: [WIRELESS-LAN] Wireless in a truck
Seems to me the power supply in the truck is your best bet. The router probably runs on DC at relatively low power compared to something like a car stereo, and the truck's battery would make as good an all-weather UPS as anything I can think of. The key questions are, what are the power requirements of your router, and how long might it need to run without starting the truck? -Original Message- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Nathan Hay Sent: Friday, November 02, 2012 4:12 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Wireless in a truck We are looking into using a cell connected router to provide wireless inside a truck. Right now we are trying to figure out how to power all of it with a UPS, etc that can survive freezing temps and very hot temps that the inside of the truck will be subjected to. I know some of you have provided wireless inside buses for students and other applications. Any thoughts on how to handle the varied environment? Thanks, Nathan Hay Network Engineer | NOC WinWholesale Inc. ** *** This email message and any attachments is for use only by the named addressee(s) and may contain confidential, privileged and/or proprietary information. If you have received this message in error, please immediately notify the sender and delete and destroy the message and all copies. All unauthorized direct or indirect use or disclosure of this message is strictly prohibited. No right to confidentiality or privilege is waived or lost by any error in transmission. ** *** ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Wireless in a truck
We are looking into using a cell connected router to provide wireless inside a truck. Right now we are trying to figure out how to power all of it with a UPS, etc that can survive freezing temps and very hot temps that the inside of the truck will be subjected to. I know some of you have provided wireless inside buses for students and other applications. Any thoughts on how to handle the varied environment? Thanks, Nathan Hay Network Engineer | NOC WinWholesale Inc. * This email message and any attachments is for use only by the named addressee(s) and may contain confidential, privileged and/or proprietary information. If you have received this message in error, please immediately notify the sender and delete and destroy the message and all copies. All unauthorized direct or indirect use or disclosure of this message is strictly prohibited. No right to confidentiality or privilege is waived or lost by any error in transmission. * ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
