4.1 Hardware Setup

This example uses the following development boards:

Tip: The Buzz 2 Click is optional and can be omitted to remove the audible alarm during development.

With the power off, insert the clicks as follows:

  • Slot 1: Ammonia Click
  • Slot 2: Buzzer Click
  • Slot 3: 2x2 Click

Then, insert the AVR EA Curiosity Nano into the Curiosity Nano adapter, with the USB port facing outwards, as shown in the figure below.

Figure 4-1. Fully Assembled System

Before use, it is important to turn the sensitivity of the Ammonia Click down as low as possible, as the sensor output may exceed the absolute maximum input voltage in extreme conditions. But more realistically, the click output could exceed the Analog to Digital Converter's (ADC) input range and cause the system to operate incorrectly.