Information

Analog Shield: Introduction
1 Applications
The Analog Shield allows better resolution for smaller and more sensitive signals that cannot reliably be recorded
or generated using the standard pins on the Arduino.
A few demos using the Analog Shield have been developed:
- Sine wave / function generator (using direct digital synthesis).
- FFT spectrum analyzer.
- Polyphonic Music generation.
- 4-channel low bandwidth oscilloscope.
- Lissajou diagram generator.
- XY-Analog scope display driver.
These demos are each explained in their own associated documentation.
2 Hardware
Figure 2. The analog shield with Hardware callouts.
1. Analog to Digital Converter (ADC) Header
The 2x4 header has the four ADC channels and four pins for the common ground on the board. The 4 ground pins
are on the outside row of the header, while the 4 ADC channels are on the inner row of the header. The ADC can
read 4-channels of data at 16-bits per channel using the analog.read() function, which are labeled with A0- A3. For
more detail on the op-amp circuitry ahead of the ADC, please refer to the shield schematic.
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