This high-precision analog-to-digital converter (ADC) module provides 16-bit resolution for accurate sensor data. It uses the ADS1115 chip to sample at up to 860 samples per second via the I2C interface. Four single-ended input channels (or two differential pairs) allow simultaneous measurement of multiple signals. The on-board programmable gain amplifier (PGA) boosts small sensor voltages (up to ±6.144V full-scale) to maximize accuracy. Operating voltage range is 2.0V–5.5V, supporting both 3.3V and 5V logic. Simply connect VCC, GND, SCL and SDA lines to your microcontroller or development board to start reading precise analog values from any sensor. Its precision and flexibility make it ideal for measuring temperatures, voltages, light levels and other analog signals in robotics, automation, IoT sensors and various electronics projects. As a 4-piece kit, this package includes four ADC modules along with jumper wires (male-to-female and female-to-female) for each board. The compact PCBs feature mounting holes and standard 0.1″ pin headers (included) for breadboard or custom wiring connections. Plug-and-play ready, you can easily add high-precision analog inputs to multiple projects or test setups at once. These versatile modules are perfect for DIY electronics, robotics, environmental monitoring, battery sensing and industrial instrumentation, providing reliable analog-to-digital conversion across a wide range of applications.