TZT PCF8591 AD / DA Conversion of Digital Converter Module Temperature Illumination For Arduino

PCF8591 is a single chip integrated, single power supply, low power consumption, 8-bit CMOS data acquisition device.PCF8591 has four analog inputs, one analog output, and one serial I2C bus interface.The three address pins A0, A1, and A2 of PCF8591 can be used for hardware address programming, allowing access to eight PCF8591 devices on the same I2C bus without additional hardware.The input and output address, control and data signals on the PCF8591 device are transmitted serially through a two-wire bidirectional I2C bus.

Main performance indicators of PCF8591:

Br single power supply

Process PCF8591 operating voltage range 2.5v -6V

Shorter standby current

Matlab serial input/output through the I2C bus

Matlab PCF8591 addresses through three hardware address pins

The sampling rate of matlab PCF8591 is determined by the I2C bus rate

The four analog inputs are programmable to be single - end or differential inputs

Creeping automatic incremental channel selection

The simulated voltage range of matlab PCF8591 is from VSS to VDD

Matlab PCF8591 has a built-in tracking and holding circuit

Shorter 8-bit approximates A/D converter successively

The dbac gain is realized through the simulated output of 1 circuit

Description of two babies

The module chip adopts PCF8951

2 module supports external 4-channel voltage input acquisition (voltage input range 0-5v)

The 3 module integrates photosensitive resistance, and can collect accurate value of ambient light intensity through AD

4 module integrated thermistor, can collect environment temperature exact value through AD

5 module integration 1 circuit 0-5v voltage input acquisition (adjust input voltage through blue potentiometer)

6 module with power indicator light (after power supply to module, the indicator light will be on)

Module 7 has DA output indicator light. When the output interface voltage of module DA reaches certain value, the DA output indicator light on the board will be lit. The higher the voltage, the more obvious the brightness of indicator light will be.

8 module PCB size: 3.6cm*2.3cm

9 standard double panel, plate thickness 1.6mm, all around with through-hole, aperture: 3mm, easy to fix

Three module interface description

The left and right sides of this module are respectively expanded by 2 pin row interfaces, which are explained as follows:

The DA output interface of the AOUT chip on the left

AINO chip simulates input interface 0

AIN1 chip simulates input interface 1

AIN2 chip analog input interface 2

AIN3 chip analog input interface 3

On the right side, SCL IIC clock interface is connected to MCU IO port

SDA IIC digital interface to single chip IO port

GND module location

The VCC power interface is externally connected to 3.3v-5v

4 module red short circuit cap instructions

The module has 3 red short circuit caps, which are respectively used as follows:

P4 is connected with P4 short circuit cap and thermistor is selected to access the circuit

P5 is connected with P5 short circuit cap, and choose photosensitive resistance to access the circuit

P6 is connected with P6 short circuit cap, and 0-5v adjustable voltage is selected to access the circuit