Design with Gravity: I2C ADS1115 16-Bit ADC Module in Cirkit DesignerThe Gravity: I2C ADS1115 16-Bit ADC Module is a high-precision analog-to-digital converter (ADC) that provides 16-bit resolution over an I2C interface. This module is ideal for microcontrollers that do not have an analog-to-digital converter or when a higher precision ADC is required. Common applications include sensor reading, data logging, and industrial automation.
This circuit features two ESP8266 NodeMCU microcontrollers, each interfaced with a Gravity I2C ADS1115 16-Bit ADC module for analog-to-digital conversion. The microcontrollers communicate with the ADC modules via I2C protocol, with one set of connections for each microcontroller-ADC pair, and are powered through a common 3.3V and ground connection.
Open Project in Cirkit Designer
This circuit features a Raspberry Pi 4B as the central processing unit, interfaced with an Adafruit ADS1115 16-bit I2C ADC for analog-to-digital conversion and a 0.96" OLED display for visual output. The ADS1115 is connected to a current sensor for measuring electrical current, with the sensor's output and burden pins connected to the ADC's analog input channels. The Raspberry Pi communicates with both the ADC and the OLED display over the I2C bus, using its GPIO2 and GPIO3 pins for data (SDA) and clock (SCL) lines, respectively.
Open Project in Cirkit Designer
This circuit features a Raspberry Pi 4B as the central processing unit, interfaced with an Adafruit ADS1115 16-bit I2C ADC for analog-to-digital conversion and a 0.96" OLED display for visual output. The ADC is connected to a current sensor for measuring electrical current, with the sensor's output connected to the ADC's AIN0 pin and the burden resistor connected to AIN1. The Raspberry Pi communicates with both the ADC and the OLED display over the I2C bus, using GPIO2 (SDA) and GPIO3 (SCL) for data exchange.
Open Project in Cirkit Designer
This circuit connects a Raspberry Pi 4B to an Adafruit ADS1115 16-bit I2C ADC and a Turbidity Module for water quality measurement. The Raspberry Pi communicates with the ADC over I2C (using GPIO2 for SDA and GPIO3 for SCL), which in turn reads analog signals from the Turbidity Module connected to its AIN0 pin. The circuit is designed to monitor water turbidity, with the Raspberry Pi processing and potentially logging the data from the turbidity sensor.
Open Project in Cirkit Designer| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | VDD | Power supply (2.0V to 5.5V) |
| 2 | GND | Ground |
| 3 | SCL | I2C clock signal |
| 4 | SDA | I2C data signal |
| 5 | ADDR | Address selection pin (configures I2C address) |
| 6 | ALRT | Alert/RDY pin (optional use) |
| 7 | A0 | Analog input channel 0 |
| 8 | A1 | Analog input channel 1 |
| 9 | A2 | Analog input channel 2 |
| 10 | A3 | Analog input channel 3 |
#include <Wire.h>
#include <Adafruit_ADS1015.h>
Adafruit_ADS1115 ads; // Create an instance of the ADS1115
void setup() {
Serial.begin(9600);
ads.begin(); // Initialize the ADS1115
}
void loop() {
int16_t adc0 = ads.readADC_SingleEnded(0); // Read from channel 0
Serial.print("AIN0: "); Serial.println(adc0);
delay(1000);
}
Q: Can I use this module with a 3.3V system? A: Yes, the ADS1115 can operate at 3.3V.
Q: How do I change the I2C address? A: Connect the ADDR pin to GND, VDD, SDA, or SCL to set the address to one of four possible values.
Q: What is the maximum voltage that can be measured? A: The maximum voltage is determined by the PGA setting, which can be up to ±6.144V.
Q: Can the ADS1115 be used with Raspberry Pi? A: Yes, it can be interfaced with a Raspberry Pi using the I2C protocol.
Q: How do I use the ALRT/RDY pin? A: This pin can be used as an alert or a conversion ready signal. Consult the ADS1115 datasheet for detailed configuration instructions.