Hi everyone,
I'm intending on embarking on a small project to control a rolling door in my office using a Beagle Board (or perhaps an Arduino board).
I am thinking about using Alberto Panu's "Ardupower" for this project (scroll down a little for the schematic).
I have some questions:
1) On his list of components he has: 6 x relays 12 volt 10 ampere. What does "12 volt 10 ampere" mean? Is it the threshold at which the contacts "pull" together? Is it the maximum/rated voltage you can put across the coil?
2) I can see that he has a 560Ω resistor in series with an LED. Is this included inside the relay, or is something you have to add yourself?
3) I read somewhere that an arc will form when the contacts come together and when they come apart. I would imagine this would be a problem for large motors such as the one I'm using.
I'm intending on embarking on a small project to control a rolling door in my office using a Beagle Board (or perhaps an Arduino board).
I am thinking about using Alberto Panu's "Ardupower" for this project (scroll down a little for the schematic).
I have some questions:
1) On his list of components he has: 6 x relays 12 volt 10 ampere. What does "12 volt 10 ampere" mean? Is it the threshold at which the contacts "pull" together? Is it the maximum/rated voltage you can put across the coil?
2) I can see that he has a 560Ω resistor in series with an LED. Is this included inside the relay, or is something you have to add yourself?
3) I read somewhere that an arc will form when the contacts come together and when they come apart. I would imagine this would be a problem for large motors such as the one I'm using.