BS2 to relay.

tjl48

I have a class project coming up and know what I'm going to do but don't really know how to do it. I made a drying structure out of pvc pipe and was going to hook it up to a large blower. I was going to use the microcontroller to control several timers. But I'm not sure how to power a big enough blower. I was looking for differnet relays but can't find one with the right mounting type and rating. I wanted to just find a relay that I can just wire to a power outlet and let the I/O pins control the on and off with the timers. The output could be 120vac too but can't find one. Anyone have any idea's.

Joms

How big of a blower? Do you know what the current draw on it is?

tjl48

I haven't decided on a blower yet. I am going to pick that dpending on how much power I could get to it. I could use a smaller relay and just use a battery but I'm not sure how long that would last and I would probably have to use a smaller blower than I would like to.

Franklin

Google SSR or solid state relay

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- Stephen

erco

Radio Shack 12VDC/10A DPDT Plug-in Relay $8.49 Model: 275-218 will handle anything you can wire up to it. You can parallel the contacts to handle 20 amps at 120 VAC, that's 2400 watts. The coil is 12 volts, so use a 12-volts supply (battery or adapter) to power it, regulate it to 5v for the Stamp, which will turn the relay on with one output driving a small switching transistor. The coil only pulls 130 mA.

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·"If you build it, they will come."

QuattroRS4

I would go for an SSR for that application .. you will have contact arcing to deal with if you use a relay for a large inductive load.. crydom do a nice small factor DIN rail mount range with both/ac and dc load options ..(see attached pdf)

If you really want to go the relay route ..
Have a look at this thread .. http://forums.parallax.com/showthread.php?p=632696

Regards,

········· John Twomey

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'Necessity is the mother of invention'