Meaning of 作っ in Japanese

This carving knife ... it's one made by a famous swordsmith.

I had imagined that the newbies fresh from university would probably be stuck with all the backstage work - collecting reference material, getting copies and such but I couldn't have been proved more wrong.

I also brought some gruel I made. It just needs warming up.

Let's make Valentine's Day chocolate today.

Theremin: The world's first electronic musical instrument, made by Russian physicist Lev Sergeivitch Termen in 1920.

I also digitized it and made a desktop image.

If you make too many, we won't be able to sell them all, so don't go wild.

Heck, with oboe players there are those who, rather than search for a reed that suits them, find it faster to make their own.

I got the OK so I unthinkingly created the clichéd 'grass runner thief/bard' character.

By the age of seven, he had already made his own bow and arrows.