Switching power with 1-wire

[UltraSub]

Hi there all..

Just finished my first 1-wire network, running 4 sensors now.
What I really want and need fast, is a relay. I'm not very good with electricity though. On Hobby-Boards.com I noticed 4 and 8-channel relays. The software part I can understand. What I don't understand, is how to switch a device... Maybe someone here can explain it to me, or tell me what I should order.
Imagine this situation:

Koi pond feeder. Has a 12V DC motor. If I apply 12V to the motor, it runs. Normally this is regulated by the PCB's in the feeder. Those PCB's have failed, and it triggered me to make it work with 1-Wire.
The way I see it, is that there are two ways.
Have a relay power the motor with 12V, or have a relay switch the 220V AC power line (has a trafo built in for conversion to 12V DC).
Sure looks like the easiest, and the best, solution is to have the relay drive the 12V DC directly.

But that's where I got stuck. Looking at the relays on Hobby-Boards.com, I don't know how to drive this 12V motor. Do I need something other besides the relay board? If yes, what would I need? Can someone help me with this?

Thanks!
Regards,
Robert

 

[ericvic]

Hi there all..

Just finished my first 1-wire network, running 4 sensors now.
What I really want and need fast, is a relay. I'm not very good with electricity though. On Hobby-Boards.com I noticed 4 and 8-channel relays. The software part I can understand. What I don't understand, is how to switch a device... Maybe someone here can explain it to me, or tell me what I should order.
Imagine this situation:

Koi pond feeder. Has a 12V DC motor. If I apply 12V to the motor, it runs. Normally this is regulated by the PCB's in the feeder. Those PCB's have failed, and it triggered me to make it work with 1-Wire.
The way I see it, is that there are two ways.
Have a relay power the motor with 12V, or have a relay switch the 220V AC power line (has a trafo built in for conversion to 12V DC).
Sure looks like the easiest, and the best, solution is to have the relay drive the 12V DC directly.

But that's where I got stuck. Looking at the relays on Hobby-Boards.com, I don't know how to drive this 12V motor. Do I need something other besides the relay board? If yes, what would I need? Can someone help me with this?

Thanks!
Regards,
Robert

Robert,

Our current relay option doesn't support 220v directly so switching the 12vdc is the way to go. What you would need to do is to run the ground line from the 12v power supply to the motor and then run the positive line to the terminal on the relay board marked C (common) then you would run a line from the terminal marked NO (normally open) to the motor. That way the motor would run when you switched on the relay.

Let me know if that didn't answer your questions.

Eric

 

[UltraSub]

Robert,

Our current relay option doesn't support 220v directly so switching the 12vdc is the way to go. What you would need to do is to run the ground line from the 12v power supply to the motor and then run the positive line to the terminal on the relay board marked C (common) then you would run a line from the terminal marked NO (normally open) to the motor. That way the motor would run when you switched on the relay.

Let me know if that didn't answer your questions.

Eric

Thanks for your fast answer Eric.
I will do it like you said. Ordered a board yesterday evening ^_^

Thanks!
Robert