[Bglug] DC Current and Wire Size

LP linuxpusher2 at gmail.com
Sat Dec 5 11:37:41 EST 2015


Thanks peter




On 5 December 2015 at 11:32, Peter <pjr at bmts.com> wrote:

> There was a brief talk about running DC 12V LED lamps and the required
> wire size.
> 1) Remember that for DC, the wire length is from source to device AND BACK
> TO SOURCE.
> 2) There will be many sources on the Internet on this. From my copy of
> Nigel Calder's Boat Owner's Mechanical and Electrical Manual, pages 90 and
> 91
> for a 10% voltage drop on a 5 ampere load
> Wire size    Length in feet from source to device and back to source
> 18                10
> 16                40
> 14                60
> 12                90
> 10                140
> 3) From my limited experience with wiring, I take my estimated wire length
> required to run the wire and then double it to allow for all those bends
> and up walls and down walls. And for DC, possibly double it again for the
> return leg.
> YMMV,
> Peter Richards
>
> Two things are infinite: the universe and human stupidity; and I'm not
> sure about the the universe. -  Albert Einstein
>
> On 12/04/2015 12:00 PM, group-request at bglug.ca wrote:
>
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>>     1. Using Raspberry Pi to emulate USB keyboard? (William Park)
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>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Thu, 3 Dec 2015 19:31:36 +0000 (UTC)
>> From: William Park <opengeometry at yahoo.ca>
>> To: Bruce-Grey Linux Users Group <group at bglug.ca>
>> Subject: [Bglug] Using Raspberry Pi to emulate USB keyboard?
>> Message-ID:
>>         <493813006.11990419.1449171096811.JavaMail.yahoo at mail.yahoo.com>
>> Content-Type: text/plain; charset="utf-8"
>>
>> Following on the recent discussion of $5 Raspberry Pi...
>> Do you guys know if it's possible to use Raspberry Pi to emulate USB
>> keyboard?? As far as PC is concerned, it's receiving keypresses from some
>> keyboard, which happens to be RPi faking as keyboard.
>> If so, where do I start my reading?
>>
>
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