Go Down

Topic: connecting this relay to a pin (Read 1 time) previous topic - next topic

SouthernAtHeart

This relay is rated at 5v, 30 mA on the coil, so can it be connected directly to an i/o  pin on my board?
http://www.sparkfun.com/products/524

cr0sh

In theory, you could, since the pins are rated to source 40 mA - but I wouldn't (unless you're only using one or two, and have a good reason to avoid using a buffer circuit). If you do, remember you still need a snubber diode across the coil...
I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread.

retrolefty

Yes, but you should wire a diode across the coil terminals in reverse bias to suppress transients when de-energizing.

Lefty

SouthernAtHeart

Ah yes, seems like that's a fly by or flyback diode...
something like a 1N4448, or does it need to handle more power like a 1n4006?
thanks

retrolefty


Ah yes, seems like that's a fly by or flyback diode...
something like a 1N4448, or does it need to handle more power like a 1n4006?
thanks


Not sure, but I like 1 amp diodes for things like that, so my vote would be any of the 1N400x series.

Lefty

jada

hi there i have a question how do you people know about that diode and ic names (numbers?)

Grumpy_Mike

because we have been using them for years. They seep inside your skin.
My telephone extension at work is 741 - now how many of you know what one of those are - been using them for 40 years.

jada

hehe! okey well i thought that we should somehow learn that somewhere  !  ;)

mmcp42


because we have been using them for years. They seep inside your skin.
My telephone extension at work is 741 - now how many of you know what one of those are - been using them for 40 years.


hee hee love the number
op amp as I recall?!?
there are only 10 types of people
them that understands binary
and them that doesn't

jumanji

Fyi - this place sells a board with 4 relays that you can connect directly to an Arduino output pins.  It is not a "shield" that mounts on the arduino but comes with wires for each relay that are easy to connect to whatever arduino board you have. Also you have to provide a separate 12V supply to the relay board to activate the relays. Here is the link: http://www.pimpmyprop.com/RB4RelayBoardDetails.htm.

Go Up
 


Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

Arduino
via Egeo 16
Torino, 10131
Italy