My inspiration for this project is: http://dennishavlena.com/tamboura.htm
The tamboura (tambura, tampura, tanpuras) is an Indian fretless drone lute. The strings have a thread tied on to them to dampen the primary tone but allow the harmonic overtones to ring. Tambouras are tuned in unison with some strings as a 5th above the root note.
Step 1: Make a cigarbox guitar.
Mine has tuning pegs from a first-act guitar I found in an alley, the nut was another found scrap, the cigarbox was recycled from another project.
The next part is the super simple buzzing bridge.