i am not doing it to be rich
i was looking this site
https://bitcoinwisdom.com/bitcoin/difficultyi think i am doeing it wrong
46usb X 330kh/s = 15180kh/s
when i put that in the bitcoin calculator it gave 0.0004144usd a day
but when i put it in the litecoin calculator it gave 23.1usd a day
can that be right or have i misunderstood this......
You're purchasing SHA ASIC, they work for Bitcoin mining only, not Litecoin mining.
So 0.0004144 USD/day is the correct figure, considering the current difficulty.
I wouldn't advice purchasing a shitload of USB miners even if you're doing this for fun.
Instead consider purchasing ONE Gridseed ASIC miner which works with Litecoin. You'll have fun and a considerable return on your investment too, at least for a few months.
http://zoomhash.com/collections/asics/products/same-day-shipping-gridseed-320-420-kh-s-asic-scrypt-sha-miner-ships-from-los-angeles