Set up in a Area where either you found Crappies, or see other shantys around, or lots of holes in a Given Area.
Then..
Take a 5" Auger clean out all ice shavings, and take a 6-8" Lantern w/a 6 Volt Battery, turn it on and point it into the hole..The Light will attract Minnows, and Crappie..
I've done it and works great..
Stan