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Daily Reminder Button / Calendar With ArduinoView Instructable »
No idea on the inductor, sorry. However, with the Elvis Alive bot I have found that most problems tend to be from loose connector wires. Specifically, where the wires connect to the ELV board. These connectors should all be checked first with a continuity checker. When my Elvis heads have malfunctioned, it is typically seen somewhere in the startup sequence aborting early (when you turn on the Elvis head, it will do a specific set of movements as a self-check). If you note where it stops, you can rather quickly narrow down your loose wire search to the offending motor controller wires. Good luck. BTW, I have several working bot heads for sale... and I still see them go on sale on ebay for ~$100 USD (usually the ones without a remote).
Thanks! The WooWee Elvis Alive heads are getting a bit more difficult to find, but used (opened box) ones do still come up for sale on eBay quite regularly for ~ $100 usd.
Making a life sized talking humanoid headView Instructable »