Sometimes on reboot, relay switches position for a few seconds

Using Arduino General Electronics
#1

Sometimes on reboot, relay switches position for a few seconds

Is there a way to prevent this?

I am using Arduino Yum and the relay is connected directly to output pin, 5v and gnd.

Maybe with some circuitry?

regards,

Sean.

#2

You appear to have posted the same question twice.

#3

found a great link: http://www.codeproject.com/Articles/724881/Arduino-How-to-wire-a-relay

#4

And, does that solve your problem ?

That is the problem you’ve experienced, as this will prevent the Arduino from being fried by the relay and it’s back-EMF.

Consider using a pull down resistor (of relative low value) to control that transistor, in case your Arduino isn’t doing that.

#5