How do I use an ADC to read analog signals?
To use an ADC (Analog-to-Digital Converter) to read analog signals with a microcontroller ( MCU ), you'll need to follow a series of steps to configure and interact with the ADC hardware. Here’s a general process: 1. Connect the Analog Signal to the ADC Input Pin Step : First, you need to wire the analog signal to the ADC input pin of the MCU （ what is a MCU? ）. Most MCUs have several analog input pins (e.g., A0, A1, etc.). Important : Ensure the input signal is within the acceptable voltage range for the ADC (usually 0 to the reference voltage, often 3.3V or 5V). If the analog signal is outside this range, you may need to scale it down using resistors or an operational amplifier. 2. Configure the ADC in the MCU (Set up the ADC Register or Settings) Step : In most MCUs, you need to configure the ADC settings in your code, which typically involves: Setting the reference voltage (e.g., Vcc, external reference). Setting the resolution of the ADC (e.g., 8-bit, 10-bit, 12-bit). Enabli...