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Engineer Andrew Maxwell-Parish has identified the element every tip jar lacks: Wu-Tang Clan’s masterpiece “C.R.E.A.M.” (“Cash Rules Everything Around Me”). Using a 3-D printer, a laser cutter, an Arduino microcontroller, a speaker, a battery, and other parts, he turned a tin can into a receptacle that plays part of the track every time money goes inside. Maxwell-Parish’s Wu-Tang Can arrives just in time for the group’s 20th-anniversary album, which is slated for release in July.

Dollar Detector: Beneath the 3-D–printed lid, an LED shines onto a photoresistor. This sensor detects whenever money drops into the can, triggering the Arduino to play a random clip from an audio file of “C.R.E.A.M.”

Time: 1 day

Cost: About $70

Download a PDF of instructions to build the Wu-Tang Can here.

_This article originally appeared in the July 2014 issue of _Popular Science.

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