Four single-ended or two differential inputs (ADS1115 model). With 16-bit resolution, a wide input range, and an integrated programmable gain amplifier, this module is designed to handle both large and small signals with exceptional accuracy.
ADS1115 4-Channel ADC Module with PGA for Precision Measurement
ESP32 4-Channel Relay Board WiFi Bluetooth ESPHome Tasmota Smart Switch AC/DC
PC817, 4 channel opto-isolator breakout for Arduino optoisolator optocoupler ST
Logic Level Shifter / Converter / Translator : 4-channel 5v 3.3v
TLP281, 4 channel opto-isolator breakout for Arduino, optoisolator, optocoupler
5x Logic Level Shifter / Converter / Translator : 4-channel 5v 3.3v