You people drive me crazy sometimes he mentioned EIGHT relays he may want to drive sure for one relay you may want to use a discrete solution but i cant see a novice dealing with all the discrete components to do this job
use one of these ULN2803 http://www.ti.com/lit/ds/symlink/uln2803a.pdf On 12/25/2014 7:37 AM, William Pretty Security wrote: > > Hey Carlos; > > > > Excellent attempt ! > > > > RB is 10K and RL is the relay coil. (They probably used ‘L’ to mean coil). > > Also, if the transistor has too much gain, and the relay doesn’t turn > off completely. > > Just connect a 100K resistor between the base of the transistor (B) > and 0V on your schematic. > > > > …. And a Merry Christmas to you too J > > > > Bill > > > > "No one could make a greater mistake than he who did nothing because > he could do only a little." > > "All that is necessary for the triumph of evil is that good men do > nothing" Edmond Burke /(1729 - 1797)/ > > http://www.packtpub.com/building-a-home-security-system-with-beaglebone/book > > > > *From:*[email protected] > [mailto:[email protected]] *On Behalf Of *Carlos Cesario > *Sent:* Thursday, December 25, 2014 7:59 AM > *To:* [email protected] > *Subject:* [beagleboard] Re: Gpio Relay > > > > The circuit it will be like this ? Replacing the RB and RL by 10K > resitor...? > > > > <http://i.stack.imgur.com/iRzKO.gif> > > Thanks a lot and Merry Christmas for everyone!! > > > > Carlos > > > > > > Em quarta-feira, 24 de dezembro de 2014 22h13min50s UTC-2, Carlos > Cesario escreveu: > > Hello guys, > > > > Someone please could help/explain me how isthe best and security way > to connect 5v relays on BBB ? > > > > I 'm planning usage this > relay http://www.dx.com/en/p/arduino-5v-relay-module-blue-black-121354 > or this relay > board > http://www.dx.com/en/p/8-channel-5v-relay-module-board-for-arduino-red-156424 > > > > Thank you > > > > Best regards, > > > > Carlos > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google > Groups "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected] > <mailto:[email protected]>. > For more options, visit https://groups.google.com/d/optout. > > ------------------------------------------------------------------------ > > No virus found in this message. > Checked by AVG - www.avg.com <http://www.avg.com> > Version: 2015.0.5577 / Virus Database: 4257/8789 - Release Date: 12/22/14 > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google > Groups "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected] > <mailto:[email protected]>. > For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
