Arduino to imitate a momentary switch

Hi,

I'd liket o use arduino to control a device that can only be switched on by pressing the power button.

I want to wire arduino pins to the internal switch so that I can use arduino to control the device.

What kind of signal or code do I need to use to press-a-button, in other words to send a short-circuit signal, if that makes sense :grin:

I'd appreciate your help in this.

Look at this:

You would then use pin 13 to control:

LarryD:
Look at this:
digitalRead() - Arduino Reference

You would then use pin 13 to control:
Powerswitch tail 2 : ID 268 : $25.95 : Adafruit Industries, Unique & fun DIY electronics and kits

Thanks for this, but all I need to do is to be able to short two pins of a device that requires me to press the button.

Then have pin 13 control a relay.

image.jpg

I changed the title slightly...

I always have difficulties decoding these diagrams, is there any way to do this? I think what you're trying to show me is a physical switch/relay. I think I can use these Arduino to imitate a momentary switch - Project Guidance - Arduino Forum http://www.ebay.com.au/itm/290562086704 but that's still not what I need now.

In simple words I want to imitate a momentary switch.

See:

So are you saying that using this kind of relays is the way to do what I want to do? I suppose I can, can't I :.

How about Solid State Relay? Arduino to imitate a momentary switch - Project Guidance - Arduino Forum http://www.ebay.com.au/itm/290562086704

Your link does not work for me.

Try now http://www.ebay.com.au/itm/290562086704

This is a solid state relay so the output is not a dry contact.
It says it will work at 3-32 input volts @ 5 to 25 ma so the Arduino could drive it.

Yes you're right.

Ok, I got it now, thank you.

Last question: Can I use that SSR to power on/off ~3000W (probably less) from 220V?

3000W / 220V = 13.6 Amps.
Your SSR says it can handle up to 25 Amp DC.

Is your 220 AC or is it DC?

It's a 'standard' UK voltage 230V 50Hz and I believe this is AC.

You'll have to use a relay.