Design and Supply a schematic diagram of an 'Audio Delay' circuit.
The design should use components that are available at Digikey.
The cost of parts should not be more than $25USD.
The power supply voltage should not exceed 12volts DC, 5V supply is prefered.
The prefered delay of audio is 1 second.
The circuit should function.
The audio input is from an electric microphone.
The audio output should drive an 8ohm 5w speaker.
A schematic diagram suppied in PDF format.
A Bill of Materials suppied in a PDF format.
The BOM list must include Digikey Part Numbers
Parts should Surface Mount devices
IC packages should NOT be BGA, prefer SOIC where possible, other packages to be OK first.
Resisters and Capacitors are 0805 size.
"use record/play ic"
No recording required. Just streaming audio with 1 second delay.
"what bandwidth is needed"
Required audio frequency range is between 500Hz and 4.5KHz. Project will be used in radio communication.