This interactive witch's cauldron gets progressively creepier the closer you come!
Project tutorial by Barton Listick
Quo Vadis is an interactive boat in the inner garden of a retirement home for people with dementia.
Project showcase by basvanoerle
An Arduino-based robot drummer. It works with a transistor noise-generator and an arrangement of servos hitting a can and a pair of piezos.
Project showcase by FrancoMolina
Small and handy radio for your little ones. Let them play their favorite songs or fairytales. And that all in the wooden box!
Project tutorial by Jiří Praus
Hi John. Glad that you're building this project! The error means that there's an incompatibility between the NewPing library and the SoftPWM library.
I didn't encounter this issue two years ago, so perhaps the libraries have changed since then.
You might try using the Ping library instead of NewPing. It's not nearly as fast, but probably won't have the conflict with SoftPWM.
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