Est. Budget: $1,000.00
Need to develop a simple circuit which can store a 10 Digit Number like "98-11-28-79-81" in a permanent memory (ROM or FLASH)
On pressing of a button, the 10 Digit number read from the memory and is converted to Binary and Frequency Shift Keying (FSK) is applied to generate an audio message. The base frequency being used for the FSK - is around 22 KHZ.
This audio is played out aloud through a Ultrasonic Transmitter.
The audio will have a preamble ...