YOU SAID:
I've came up with an idea
INTO JAPANESE
アイデアを思いつきました
BACK INTO ENGLISH
I came up with an idea.
INTO JAPANESE
アイデアを思いついた。
BACK INTO ENGLISH
I've got an idea!
INTO JAPANESE
アイデアを思いついた!
BACK INTO ENGLISH
I've got an idea!
You've done this before, haven't you.