Description:
1. The module chip uses PCF8951
2. The module supports external 4-channel voltage input acquisition (voltage input range 0-5v)
3. The module integrates the photoresistor, which can capture the ambient light intensity with AD
4. Module integrated thermistor, can collect accurate temperature value of environment through AD
5. Module integrates 1 channel 0-5V voltage input acquisition (adjusts input voltage via blue potentiometer)
6. The module has a power indicator (the indicator will light when power is supplied to the module)
7. Module with DA output indicator, when the module DA output interface voltage reaches a certain value, it will light DA output indicator on the board, the greater the voltage, the greater the brightness of the indicator;
8. Module PCB size: 3.6cm x 2.3cm/1.5 x 0.9inch
9. Standard double panel, thickness 1.6mm, beautiful layout, surrounded by holes, aperture: 3mm, easy to fix.

Specification:
1 single power supply
2. Operating voltage range of PCF8591 2.5V-6V
3. Low standby current
4. Serial input/output via I2C bus
5.PCF8591 addressed through 3 hardware address pins
6. The sampling rate of the PCF8591 is determined by the I2C bus speed
7.4 analog inputs programmable to single-ended or differential inputs
8. Automatic incremental channel selection
9. Analog voltage range of PCF8591 from VSS to VDD
10.PCF8591 Built-in Tracking and Hold Circuit
11.8-bit successive approximation of A/D converter
12. DAC gain is achieved through one analog output

Package Included:
4 x PCF8591 Module AD DA Converter Module