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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*2.3cm
9. Standard double panel, thickness 1.6mm, beautiful layout, surrounded by holes, aperture: 3mm, easy to fix.
PCF8591 main performance parameters:
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:
2Pcs PCF8591 Module AD DA Converter Module
Customer
Reviewed in the United States on August 30, 2020
This is a YL-40 module with a PCF8591 ADC converter on it. I used a Raspberry Pi 4 to communicate with the module over I2C bus.Using included "suitcase jumpers", on-board sensors can be connected to ADC inputs.Jumper P4 connects thermistor to AIN1.Jumper P5 connects light sensor to AIN0.Jumper P6 connects potentiometer to AIN3.Due to PCB error (no electrical contact or trace found), you need to solder a wire from other side of thermistor R6 to GND if you want to use the thermistor. (Both of my boards have this issue and others have reported problem online). If you just want to use the ADC/DAC, the 4 analog inputs and 1 analog output work fine. The potentiometer and light sensor work fine.
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