Arduino Relay help

[littlepigboy5]

Basically, i want this to turn on and off a relay,m one clap for on, another for off, but instead one clap turns it off then back on.  if i remove the relay from the circuit, its fine, clap on led, clap off led.  more info here, http://www.element14.com/community/message/160833?tstart=0#160833 .  schematic below  here is a vid  https://youtu.be/KMs2VD4fwFA

 

[iamdarkyoshi]

use a transistor to switch the relay instead of the board and put a diode in reverse polarity of the relay. The electrical spike from the relay is freaking out the arduino, and the arduino can only supply 20mA per output. Just enough for an LED or transistor.

[Naeaes]

Maybe it needs a de-bouncer?

 

I'm thinking the relay slams shut so hard, it bounces back open and then shut again.

[littlepigboy5]

Maybe it needs a de-bouncer?

 

I'm thinking the relay slams shut so hard, it bounces back open and then shut again.

whats that, link me to one.

[iamdarkyoshi]

whats that, link me to one.

I still think its a back EMF problem.

[littlepigboy5]

use a transistor to switch the relay instead of the board and put a diode in reverse polarity of the relay. The electrical spike from the relay is freaking out the arduino, and the arduino can only supply 20mA per output. Just enough for an LED or transistor.

woah, too much electrical talk, i don't know that much lol, but know that obviously a relay is a bit overkill for just an led, im just testing the setup with an led before i hook it up to my mains

[iamdarkyoshi]

woah, too much electrical talk, i don't know that much lol, but know that obviously a relay is a bit overkill for just an led, im just testing the setup with an led before i hook it up to my mains

I know, but the coil in the relay is creating a spike of electricity when it gets energized, and it also pulls too much power from the arduino. http://makezine.com/2009/02/02/connecting-a-relay-to-arduino/

[littlepigboy5]

I know, but the coil in the relay is creating a spike of electricity when it gets energized, and it also pulls too much power from the arduino. http://makezine.com/2009/02/02/connecting-a-relay-to-arduino/

can somebody just explain in great detail a solution

[iamdarkyoshi]

can somebody just explain in great detail a solution

for a full solution, try this

As a quick attempt at solving the issue, just try putting a diode across the coil of the relay in the way that it normally WOULDNT conduct electricity

[littlepigboy5]

for a full solution, try this

As a quick attempt at solving the issue, just try putting a diode across the coil of the relay in the way that it normally WOULDNT conduct electricity

diode? like an led or what

[iamdarkyoshi]

diode? like an led or what

Nope. just a simple one of these: http://img.wonderhowto.com/img/13/30/63471303209842/0/diy-solar-power-make-your-own-diode-based-solar-panels-and-capture-suns-energy.w654.jpg

[littlepigboy5]

Nope. just a simple one of these: http://img.wonderhowto.com/img/13/30/63471303209842/0/diy-solar-power-make-your-own-diode-based-solar-panels-and-capture-suns-energy.w654.jpg

so how would i add the diode to my circuit

[iamdarkyoshi]

In a diode, electricity flows into the unstriped side and out of the silver striped side. What you want to do is put in in the circuit backwards. the silver side on the arduino's output pin, and the black side on ground. When a relay is de energized, the coil inside the relay actually creates a pulse of electricy that is actually NEGATIVE, and it is at quite a high voltage. this can cause the arduino to freak out.

[littlepigboy5]

In a diode, electricity flows into the unstriped side and out of the silver striped side. What you want to do is put in in the circuit backwards. the silver side on the arduino's output pin, and the black side on ground. When a relay is de energized, the coil inside the relay actually creates a pulse of electricy that is actually NEGATIVE, and it is at quite a high voltage. this can cause the arduino to freak out.

i still dont get it, im not stupid, i just dont know a lot about electronics.  could you like, draw it(sorry)

[littlepigboy5]

In a diode, electricity flows into the unstriped side and out of the silver striped side. What you want to do is put in in the circuit backwards. the silver side on the arduino's output pin, and the black side on ground. When a relay is de energized, the coil inside the relay actually creates a pulse of electricy that is actually NEGATIVE, and it is at quite a high voltage. this can cause the arduino to freak out.

and i could go get a diode tomrrow, any ideas with some stuff i have on hand, assorted resistors, another arduino. attiny, wires