First set up an objective tracking player death, similar to what I outlined in my answer here. For the following, I assume that this objective is named hasDied and there are two teams, red and blue.

Instead of the testfor command in that answer, you can use

/testfor @a[team=red,score_hasDied=0]

Invert the redstone output, so that it turns on when nobody is left alive in team red and continue from there. Do the same thing for the blue team.

First set up an objective tracking player death, similar to what I outlined in my answer here. For the following, I assume that this objective is named hasDied and there are two teams, red and blue.

Instead of the testfor command in that answer, you can use

/testfor @a[team=red,score_hasDied=0]

Invert the redstone output, so that it turns on when nobody is left alive in team red and continue from there. Do the same thing for the blue team.

First set up an objective tracking player death, similar to what I outlined in my answer here. For the following, I assume that this objective is named hasDied and there are two teams, red and blue.

Instead of the testfor command in that answer, you can use

/testfor @a[team=red, score_hasDied=0]

Invert the redstone output, so that it turns on when nobody is left alive in team red and continue from there. Do the same thing for the blue team.

First set up an objective tracking player death, similar to what I outlined in my answer here. For the following, I assume that this objective is named hasDied and there are two teams, red and blue.

Instead of the testfor command in that answer, you can use

/testfor @a[team=red,score_hasDied=0]

Invert the redstone output, so that it turns on when nobody is left alive in team red and continue from there. Do the same thing for the blue team.