Based on a talking-lift-buttons project published on instricttables (credits to ICstation); I have modified the schematic to the following:
- Arduino Nano controls the audio storage chip APR9600 which includes 8 messages.
- Arduino generates random 8 numbers
- each number calls one of the 8 messages.
The result, it will look like as if the Arduino is talking out of its own mind.(more realistic if we extend this systems into say 50 phrases or more which may need different audion module than APR9600)