Ok, good.  I was under the impression you already had the relay board from
the link.
Good luck with your project.


On Tue, Nov 12, 2013 at 9:57 AM, Bodo Kaiser <[email protected]> wrote:

> Yes, the second circuit uses a BJT (forgot to mention). I tried the first
> one but did not come to success.
>
> The N-MOSFET I used required a lot of power to get working and there where
> no alternatives available (do not want to buy this stuff online and wait a
> week).
>
>
> Am 12.11.2013 um 16:09 schrieb Cody Lacey <[email protected]>:
>
> I'm not completely sure what you are asking.  Are you wondering if the
> 3.3V from the Black is enough to switch the transistor?
>
>
> On Mon, Nov 11, 2013 at 9:48 PM, <[email protected]> wrote:
>
>> Hi!  It just so happens that my IEEE<https://www.facebook.com/byuidahoieee> 
>> group
>> here at BYU-Idaho are putting together a flight computer for a rocket and
>> used this to deploy our recovery system:
>>
>>
>> http://www.ebay.com/itm/221292380580?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
>>
>> I can upload a schematic later but the idea is to have a 9V battery power
>> the transistor which is triggered from an I/O pin from the BBB.  This
>> battery also supplies the current to switch the relay after the I/O pin is
>> triggered.  If your current draw is low enough, a transistor would work,
>> but the BBB GPI/O pins output 3.3 V or you could use a 5V output pin that
>> the board supplies to get the 5V directly.
>>
>>
>> On Sunday, November 10, 2013 8:39:12 AM UTC-7, Bodo Kaiser wrote:
>>>
>>> Hello,
>>>
>>> I want to control a 5V battery-powered circuit through a relay.
>>>
>>> I am quite unsure which will work with the BeagleBoneBlack and a simple
>>> GPIO input.
>>>
>>> Are there any recommendations?
>>>
>>> Best,
>>> Bo
>>>
>>
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