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