If washing is not ready (currency is high) do nothing except of maybe accumulating energy. Else send an endless beep on any frequency you like before you manag

If washing is not ready (currency is high) do nothing except of maybe accumulating energy. Else send an endless beep on any frequency you like before you manage to take your laundry and disactivate your FM beeper. It still can be implemented using a few transistors. Bonus points if implementation of this will be done in such a way that other folks can have a good use of the device.