The nano dsp is a flexible audio DSP board with 2 inputs and 4 outputs. By adding connectors of choice, the user can customize the board to its liking. I can be used for stereo 2 in, 4 out signal processing or mono , balanced in signal processing. Outputs can be configured as 4 unbalanced or 2 balanced out. The boards are tested and have a test program that outputs 1 and 3 khz on 2 channels.
Input sensitivity 2V rms
Output level 2V rms
supply 5-12V DC
undervoltage mute 4.3V
DSP ADAU1701 50 MIPS
The board comes without connectors to ease shipping. It needs minimally a 10p connector for
programming and a connector for the 5V supply. Th 10p connnector is a standard 0.1” pitch 2row 5pin boxed or shrouded connector. The power supply terminal is a 5.08mm 0.2” screwterminal. There is an unused connection between the programming socket and the supply terminal, intended for future use.
A bicolor LED has been provisioned next to the potmeter. It is a common cathode LED and can be used as signal and overload indicator. The LED is controlled from by the DSP from GPIO_4 and GPIO_5. The LEDs have a Pfet buffer, so to activate the led, the line needs to be pulled low. IN the DSP hardware register configuration it is convenient to invert the polarity, such that the leds are activated when a signal is high.
!Notice! The Nano DSP wil be shipped WITHOUT any connectors