Each set of independent packaging, including 4 20cm DuPont line

Each weight is about 10g

Introduction of a AD/DA PCF8591 chip
A monolithic integrated power alone is pcf8591, low power, CMOS 8-bit data acquisition device.PCF8591 have four analog input, one analog output and a serial I2C bus interface.PCF8591 three address pins A0, A1 and A2 can be for hardware address programming and allowed the same I2C bus access 8 pcf8591 devices, without the need for additional hardware. In the pcf8591 device input and output address, control and data according to the signal are the two-line bidirectional I2C bus to serial transmission.
Main performance index of PCF8591:
. the single power supply
& have spent Taken the PCF8591 operating voltage range of 2.5 V to 6 V
  low standby current.
. through the I2C bus serial input / output
  * PCF8591 through 3 hardware address pin addressing
. PCF8591 sampling rate is determined by the I2C bus speed
  * 4 programmable analog input for single ended or differential input
  * automatic incremental channel selection
  analog voltage range from VSS to VDD PCF8591.
. PCF8591 built-in track circuit
  8-bit SAR A/D converter
  * DAC gains by 1 Analog Output

The baby description
& have spent 1 module adopts PCF8951 chip
  2 module supports external 4 input voltage input acquisition (voltage input range 0-5V)
& have spent 3 modules integrated photosensitive resistance, can pass AD sampling precision of environmental light values
  4 module integrated thermal resistance, can be collected through the AD environment temperature accurate numerical
  5 module integrated 1 0-5V voltage input acquisition (through the blue potentiometer to adjust the input voltage)
6 module with power indicator (after the power indicator lights on the module)
  7 module with DA output indicator, when the module DA output interface voltage to a certain value, will light the board DA output indicator, the greater the voltage, the more obvious the brightness of the indicator;
  8  module PCB size: 3.6cm*2.3cm
9 standard double panel, thickness 1.6mm, elegant layout, are arranged around the through hole, the aperture is 3mm, convenient for fixing

Three module interface description
This module on the left and right respectively extending 2 pin interface, respectively as follows:
Left AOUT chip DA output interface
            AINO chip analog input interface 0
            AIN1 chip analog input interface 1
AIN2 chip analog input interface 2
AIN3 chip analog input interface 3
  on the right side of the SCL  IIC clock interface   then the MCU IO port
SDA IIC digital interface connected to the microcontroller IO port
& have spent & have spent & have spent & have spent & have spent & have spent GND  Module to & have spent & have spent & have spent & have spent & have spent & have spent External to
            VCC  power interface;         external 3.3v-5v

Four   module red short circuit cap instructions
  the module consists of 3 red short circuits, which are as follows:
  P4    connect to the P4 short circuit cap, select the thermistor access circuit
  P5    connect to the P5 short circuit cap, select the photosensitive resistor access circuit
  P6    connect to P6 short circuit cap, select 0-5V adjustable voltage access circuit