Homebrewing equipment is still done by a lot of Ham's.
This page will show some links to kit-suppliers and a
link to one of my own projects.
My recent project: the K1EL Winkeyer USB, perfect keying via a USB port
At your request, a simple morse code SOUNDER
The famous K3NG Arduino keyer
Hjalmar OZ1HJM Arduino CW decoder (I know, we have to do it by ear.. :-)