Mark writes –
Here’s an electric bass created using 1 broken bass string, 1 piezo transducer, part of a cheap wooden easel leg, and 2 metal rods from a bookshelf.
DIY Electric stick bass – Link.
SensorBib upright bass augmentation – Link.
Weird bass guitars – Link.
HOW TO- Make a Guitar/Bass Pickup – Link.
DIY Cardboard box upright bass – Link.