Cheap Chinese 2-stage Temp Controller

[ajdelange]

RE the diagram in the previous post: Perhaps I'm misunderstanding the application but there is nothing behind 5-6 and 7-8 except a pair of contacts. If you intend that the things that appear to be outlets in the diagram be energized when those contacts close then one side of each contact pair must be energized. One way to make that happen , assumning the black (hot wire) from the line cord jumper is connected to pin 1, is to jumper 1 to 5 to 7. Then connect 6 to the hot side (copper colored screw head) of one outlet and 8 to the hot side of the other outlet. Connect the neutral sides of the outlets (silver colored screw head) to pin 2 and wire-nut all the earths (grounds - green or green w/yellow stripe - screw head is hex shaped on outlet) together.

[nashvegas]

RE the diagram in the previous post: Perhaps I'm misunderstanding the application but there is nothing behind 5-6 and 7-8 except a pair of contacts. If you intend that the things that appear to be outlets in the diagram be energized when those contacts close then one side of each contact pair must be energized. One way to make that happen , assumning the black (hot wire) from the line cord jumper is connected to pin 1, is to jumper 1 to 5 to 7. Then connect 6 to the hot side (copper colored screw head) of one outlet and 8 to the hot side of the other outlet. Connect the neutral sides of the outlets (silver colored screw head) to pin 2 and wire-nut all the earths (grounds - green or green w/yellow stripe - screw head is hex shaped on outlet) together.

if i read you right is this what you mean? sorry for the unorganized schematic.

[Kbar]

Check my work.

http://www.flickr.com/photos/47851738@N05/4388234693/

Can not get the Flickr picture to post. Sorry!

[Elbone]

RE the diagram in the previous post: Perhaps I'm misunderstanding the application but there is nothing behind 5-6 and 7-8 except a pair of contacts. If you intend that the things that appear to be outlets in the diagram be energized when those contacts close then one side of each contact pair must be energized. One way to make that happen , assumning the black (hot wire) from the line cord jumper is connected to pin 1, is to jumper 1 to 5 to 7. Then connect 6 to the hot side (copper colored screw head) of one outlet and 8 to the hot side of the other outlet. Connect the neutral sides of the outlets (silver colored screw head) to pin 2 and wire-nut all the earths (grounds - green or green w/yellow stripe - screw head is hex shaped on outlet) together.

Schooled by AJ

Duh. I'm an idiot. At least it wouldn't have killed anybody or burned their house down wired that way.

How's this look?



Note: this is not the original, bonehead diagram that AJ correctly calls me on later! It has been corrected with his help. Thanks AJ.

[ajdelange]

Not quite but closer. Kbar's sketch is OK (except that the white wire is called the neutral and the green wire earth or ground).

[Elbone]

Not quite but closer. Kbar's sketch is OK (except that the white wire is called the neutral and the green wire earth or ground).

I think I see. C'mon Brain! It's just a simple circuit with an AC source, a load and a switch. It shouldn't be this hard.

Like this?

[ajdelange]

Yep, that's it. Nashvegas also has it right.

[glasseye]

That will work, but for safety you may want to have the hot wire on the relays instead of the neutral.

With the current picture, even when the relays are off the outlets are energized. Any short or fault in your equipment will cause Bad Stuff. Putting the hot line on the relays instead of the neutral avoids this problem.