MSP430 audio prototype

MSP430 audio prototype circuit

The prototype circuit is not intended to be a final project - it's just an aide to understanding the article. It has three basic parts:1.An MSP430 and support circuitry as described in the project last week.2.An audio filter circuit attached to the PWM as described this week.3.An SD memory card connected to the MSP430's SPI interface, which I'll introduce next week.