This is a simple but functional key and code practice oscillator for learning Morse Code made from a steak-knife and multi-tester. Few components and only takes half hour to construct. And when you are finished practicing Morse code you can put the knife back in the kitchen drawer.
block of wood
2 inch binder clip
4 small magnets
multi-tester or volt-meter that has resistance tester (ohm-meter) with sound
I basically got the idea to use a steak-knife from K4IBZ’s Beef Eater Special here: http://oldsite.w4aaz.org/attachments/BEEF_EATER_SP…
There are many homemade keys out there on the web. Even one made from just paper clips.
Here are a bunch of very innovative homemade keys: https://uk.pinterest.com/sverreholm/homemade-singl…