and an EasyVR Arduino Shield for the voice control. The robot’s “eyes” are an LED ‘KITT’ scanner and an AN6884 VU meter chip that flashes the “eyes” when the robot speaks.

In the end, it looks Rube-Goldbergian, but using the phone’s audio out as a control signal is actually pretty clever. The phone-to-Arduino interface is the tricky part, after all. DTMF is an ...