hello everyone
i want some suggestion from community that, is that possible to mine etherum coin or any altcoin from antminer s7 or s5 ?
no, bud it is not. Antminer S7 & S5 are ASICs. they can ONLY hash the SHA256D algo (
BTC's algo)
they can mine ANY coin that uses the SAME algo, they CANNOT str8 mine ETH as ETH's algo is "ETHash" (dagger hashimoto)
hope that clears things up!

Welcome to
BTC!