You could program any microchip and whip up a quick little something in some hdl.. the soldering is annoying though.
OR if you had a photoelectric sensor and a stopwatch you could wire the photoelectric sensor to the casette (the stopwatch should flash when it's done counting down)
any way you do this you will probably need: a sensor, a timer, and a casette player re-soldered w/ a wire connecting the switch that would be normally trigged by the button...which wouldn't even work...seems like an awful lot of hassle over something like this. |