Using the ADS7830 breakout with Arduino involves wiring up the breakout to your Arduino-compatible microcontroller with a potentiometer, installing the Adafruit_ADS7830 library, and running the provided example code.
Wiring
Wire as shown for a 5V board like an Uno. If you are using a 3V board, like an Adafruit Feather, wire the board's 3V pin to the breakout VIN.
Here is an Adafruit Metro wired up to the breakout using the STEMMA QT connector. A potentiometer is connected to analog input 0 (A0):
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Board 5V to breakout VIN (red wire)
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Board GND to breakout GND (black wire)
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Board SCL to breakout SCL (yellow wire)
- Board SDA to breakout SDA (blue wire)
- Breakout VIN to potentiometer positive (red wire)
- Breakout A0 to potentiometer wiper (green wire)
- Breakout GND to potentiometer negative (black wire)
Here is an Adafruit Metro wired up using a solderless breadboard:
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Board 5V to breakout VIN (red wire)
-
Board GND to breakout GND (black wire)
-
Board SCL to breakout SCL (yellow wire)
- Board SDA to breakout SDA (blue wire)
- Breakout VIN to potentiometer positive (red wire)
- Breakout A0 to potentiometer wiper (green wire)
- Breakout GND to potentiometer negative (black wire)
Library Installation
You can install the Adafruit_ADS7830 library for Arduino using the Library Manager in the Arduino IDE.
Click the Manage Libraries ... menu item, search for Adafruit_ADS7830, and select the Adafruit ADS7830 library:
If asked about dependencies, click "Install all".
If the "Dependencies" window does not come up, then you already have the dependencies installed.
#include <Wire.h>
#include <Adafruit_ADS7830.h>
Adafruit_ADS7830 ad7830;
void setup() {
Serial.begin(115200);
while (!Serial) delay(10); // Wait for console to open
Serial.println("Adafruit ADS7830 Test by Limor Fried/Ladyada");
// Possible arguments to begin():
// begin(); // Uses default I2C address 0x48 and Wire
// begin(0x49); // Uses I2C address 0x49 and Wire
// begin(0x48, &Wire1); // Uses I2C address 0x48 and Wire1
if (!ad7830.begin()) {
Serial.println("Failed to initialize ADS7830!");
while (1);
}
}
void loop() {
for (uint8_t ch = 0; ch <= 7; ch++) {
uint8_t value = ad7830.readADCsingle(ch);
Serial.print(value);
if (ch < 7) {
Serial.print(",\t");
}
}
Serial.println();
delay(100);
}
Upload the sketch to your board and open up the Serial Monitor (Tools -> Serial Monitor) at 115200 baud. You'll see the ADS7830 recognized over I2C. As you turn the potentiometer attached to A0, you'll see the values change.
Page last edited January 22, 2025
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