Now in the 7th day of testing on the LM317 DC voltage regulator for the NSM5 and it's all good news. I regulated the voltage up to about 20v average and the LM317 doesn't even get warm. With so little heat dissipation there is likely to be very little loss also. This looks like a solution
- - - *Olufemi Adalemo* M: +234-803-5610040 M: +234-809-8610040 f...@adalemo.com On Mon, Oct 22, 2012 at 11:58 AM, Olufemi Adalemo <adal...@gmail.com> wrote: > Yes I was warned about the head dissipation. Ultimately the best option is > to plug in a switching DC-DC converter. Will look for one but while I'm > waiting this may be the best option, albeit with a huge heat sink > > - - - > *Olufemi Adalemo* > M: +234-803-5610040 > M: +234-809-8610040 > f...@adalemo.com > > > > > On Sat, Oct 20, 2012 at 1:57 AM, Blair Davis <the...@wmwisp.net> wrote: > >> Watch the heat dissipation on that... >> >> -- >> >> >> On 10/19/2012 5:55 PM, Olufemi Adalemo wrote: >> >> A friend of mine suggested that I put a simple DIY LM317 voltage >> regulator on the line. Just built one and it works to reduce the voltage >> just enough for you to come in under the limit if you have a 24v solar >> power supply system >> >> http://diyaudioprojects.com/Technical/Voltage-Regulator/ >> >> - - - >> *Olufemi Adalemo* >> M: +234-803-5610040 >> M: +234-809-8610040 >> f...@adalemo.com >> >> >> >> >> On Fri, Oct 19, 2012 at 1:27 PM, Chris Fabien <ch...@lakenetmi.com>wrote: >> >>> My guess would be inconsistent cheapo volt meter or power >>> supply/battery voltage was fluctuating. >>> >>> On Thu, Oct 18, 2012 at 10:24 PM, Greg Ihnen <os10ru...@gmail.com> >>> wrote: >>> > That's what I thought... but... he said: "We see 27.3 volts at the >>> battery. >>> > And 27.1 volts at the top with no load" >>> > >>> > >>> > On Thu, Oct 18, 2012 at 3:57 PM, Chris Fabien <ch...@lakenetmi.com> >>> wrote: >>> >> >>> >> No current = no voltage drop. Ohms Law. >>> >> >>> >> On Thu, Oct 18, 2012 at 3:38 PM, Jeromie Reeves < >>> jree...@18-30chat.net> >>> >> wrote: >>> >> > The resistance of the length of wire. >>> >> > >>> >> > On Thu, Oct 18, 2012 at 11:03 AM, Greg Ihnen <os10ru...@gmail.com> >>> >> > wrote: >>> >> >> A voltage difference with no load? What's causing the drop? >>> >> >> >>> >> >> >>> >> >> On Thu, Oct 18, 2012 at 10:06 AM, Justin Wilson <li...@mtin.net> >>> wrote: >>> >> >>> >>> >> >>> We see 27.3 volts at the battery. And 27.1 volts at the >>> top >>> >> >>> with >>> >> >>> no load. >>> >> >>> Obviously load will have an impact on this. >>> >> >>> >>> >> >>> Justin >>> >> >>> >>> >> >>> -----Original Message----- >>> >> >>> From: Jeromie Reeves <jree...@18-30chat.net> >>> >> >>> Reply-To: WISPA General List <wireless@wispa.org> >>> >> >>> Date: Thursday, October 18, 2012 9:15 AM >>> >> >>> To: WISPA General List <wireless@wispa.org> >>> >> >>> Subject: Re: [WISPA] Another Ubiquity question >>> >> >>> >>> >> >>> >That depends on wire size. That distance is not going to be >>> ethernet >>> >> >>> >so I will assume #12 AWG, 400ft, copper wire, etc. You should be >>> >> >>> >seeing a 5.6% drop under a 1amp load or about 25v under load. >>> >> >>> > >>> >> >>> > >>> >> >>> >On Thu, Oct 18, 2012 at 6:02 AM, Justin Wilson <li...@mtin.net> >>> >> >>> > wrote: >>> >> >>> >> 27 volts at the base. DC has very little loss over >>> 400-500 >>> >> >>> >> foot >>> >> >>> >> distances. We are seeing about .1 volt loss on a 400 foot run. >>> >> >>> >> >>> >> >>> >> -----Original Message----- >>> >> >>> >> From: Scott Lambert <lamb...@lambertfam.org> >>> >> >>> >> Reply-To: WISPA General List <wireless@wispa.org> >>> >> >>> >> Date: Thursday, October 18, 2012 12:16 AM >>> >> >>> >> To: <wireless@wispa.org> >>> >> >>> >> Subject: Re: [WISPA] Another Ubiquity question >>> >> >>> >> >>> >> >>> >>>On Wed, Oct 17, 2012 at 10:14:03PM -0400, Justin Wilson wrote: >>> >> >>> >>>> Many UBNT deployments running at 27volts of clean DC power. >>> Not >>> >> >>> >>>> saying it's ideal but it works. >>> >> >>> >>> >>> >> >>> >>>27v at the ethernet port or 27v at the base of the tower? >>> >> >>> >>> >>> >> >>> >>>-- >>> >> >>> >>>Scott Lambert KC5MLE >>> Unix >>> >> >>> >>>SysAdmin >>> >> >>> >>>lamb...@lambertfam.org >>> >> >>> >>>_______________________________________________ >>> >> >>> >>>Wireless mailing list >>> >> >>> >>>Wireless@wispa.org >>> >> >>> >>>http://lists.wispa.org/mailman/listinfo/wireless >>> >> >>> >>> >>> >> >>> >> >>> >> >>> >> >>> >> >>> >> _______________________________________________ >>> >> >>> >> Wireless mailing list >>> >> >>> >> Wireless@wispa.org >>> >> >>> >> http://lists.wispa.org/mailman/listinfo/wireless >>> >> >>> >_______________________________________________ >>> >> >>> >Wireless mailing list >>> >> >>> >Wireless@wispa.org >>> >> >>> >http://lists.wispa.org/mailman/listinfo/wireless >>> >> >>> > >>> >> >>> >>> >> >>> >>> >> >>> _______________________________________________ >>> >> >>> Wireless mailing list >>> >> >>> Wireless@wispa.org >>> >> >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >> >> >>> >> >> >>> >> >> >>> >> >> _______________________________________________ >>> >> >> Wireless mailing list >>> >> >> Wireless@wispa.org >>> >> >> http://lists.wispa.org/mailman/listinfo/wireless >>> >> >> >>> >> > _______________________________________________ >>> >> > Wireless mailing list >>> >> > Wireless@wispa.org >>> >> > http://lists.wispa.org/mailman/listinfo/wireless >>> >> _______________________________________________ >>> >> Wireless mailing list >>> >> Wireless@wispa.org >>> >> http://lists.wispa.org/mailman/listinfo/wireless >>> > >>> > >>> > >>> > _______________________________________________ >>> > Wireless mailing list >>> > Wireless@wispa.org >>> > http://lists.wispa.org/mailman/listinfo/wireless >>> > >>> _______________________________________________ >>> Wireless mailing list >>> Wireless@wispa.org >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >> >> >> >> _______________________________________________ >> Wireless mailing >> listWireless@wispa.orghttp://lists.wispa.org/mailman/listinfo/wireless >> >> >> -- >> West Michigan Wireless ISP >> Allegan, Michigan 49010 >> 269-686-8648 >> >> A Division of: >> Camp Communication Services, INC >> >> >> _______________________________________________ >> Wireless mailing list >> Wireless@wispa.org >> http://lists.wispa.org/mailman/listinfo/wireless >> >> >
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