If you want to drive a 5V relay with a 3.3V pin use the MOSFET as a switch (as described). It's not possible to get 5V out of 3.3V. At least not for beginners.
2015-01-01 22:08 GMT+01:00 Carlos Cesario <[email protected]>: > Why no sense Tux? > > Is this convertion not possible? > > Thank you > > Carlos > > Em quinta-feira, 1 de janeiro de 2015 18h44min57s UTC-2, Tux Leonard > escreveu: >> >> I am sorry but this is nonsense. >> >> 2015-01-01 21:12 GMT+01:00 William Pretty Security <[email protected] >> >: >> >>> Why don’t you just use a 3 volt relay ? >>> >>> >>> >>> I have several on order from Digikey. >>> >>> I am basically doing what you are attempting. >>> >>> I am driving a 3 volt relay from an I/O port. The trick is to use the >>> Digikey Search feature to look for a 3 volt relay and NOT a 3.3 version. >>> >>> If you use a 3 volt relay then the Vce voltage drop of the transistor >>> will not affect the relay. (turn on is usually ~2.5v) They also come with >>> built in diodes J >>> >>> >>> >>> Bill >>> >>> *From:* [email protected] [mailto:[email protected]] *On >>> Behalf Of *Carlos Cesario >>> *Sent:* Thursday, January 01, 2015 3:03 PM >>> *To:* [email protected] >>> >>> *Subject:* Re: [beagleboard] Re: Gpio Relay >>> >>> >>> >>> Hello Tux Leonard, thank you by your answer. >>> >>> >>> >>> Using +5v I had success too, but I would like to usage only +3v and >>> convert it to +5v like this circuit >>> >>> >>> >>> http://electronics.stackexchange.com/questions/ >>> 56093/how-to-use-a-3v-output-to-control-a-5v-relay >>> >>> >>> >>> But I 'm having difficult understand this and simulate with BBB or RPi >>> >>> >>> >>> If possibe, could you help me pls? >>> >>> >>> >>> Thank you o much and happy new year for everyone!!!! >>> >>> >>> >>> Carlos >>> >>> >>> Em quinta-feira, 1 de janeiro de 2015 17h00min02s UTC-2, Tux Leonard >>> escreveu: >>> >>> Perhaps you can google for "MOSFET as Switch" >>> >>> >>> >>> I attached my solution. The relay should be connected to the end of the >>> blue line and +5V. >>> >>> To protect your circuit you could add a diode in parallel to the relay. >>> >>> >>> >>> >>> >>> 2015-01-01 17:32 GMT+01:00 Carlos Cesario <[email protected]>: >>> >>> Hello guys! >>> >>> >>> >>> It is wrong!!! Does nos working as expected. :( >>> >>> >>> >>> Does someone could instruct me how todo this ? 3v to 5 using 2n7000 .. >>> >>> >>> >>> Thank you! >>> >>> >>> >>> 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]. >>> 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. >>> ------------------------------ >>> >>> No virus found in this message. >>> Checked by AVG - www.avg.com >>> Version: 2015.0.5577 / Virus Database: 4257/8807 - Release Date: 12/25/14 >>> Internal Virus Database is out of date. >>> >>> -- >>> 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. >>> >> >> -- > 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. > -- 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.
