Dimensions: 38.5 * 23.5mm
Shipping list:
1.PCF8591 module * 1
2.4PIN female-female DuPont lines * 1
PCF8591 AD / DA chip introduction
PCF8591 is a monolithic, single supply, low power,8-bit CMOS data acquisition devices. PCF8591 has four analog inputs, one analog output and a serial I2C bus interface. PCF8591 the three address pins A0, A1 and A2 can be used for programming the hardware address, allowing access to eight PCF8591 devices on the same I2C-bus without additional hardware. Input and output on PCF8591 device address, control and data signals are by-wire bidirectional I2C bus serially transmitted.
PCF8591 key performance indicators:
Single power supply
PCF8591 operating voltage range of 2.5V-6V
Low standby current
Through the I2C bus serial input / output
PCF8591 by 3 hardware address pins addressing
PCF8591 I2C bus speed sampling rate decision
4 analog inputs programmable as single-ended or differential inputs
Automatic incremental channel selection
PCF8591 analog voltage range from VSS to VDD
PCF8591 built-track and hold circuit
8-bit successive approximation A / D converter
DAC gain realized by an analog output
Description
1 module chip PCF8951
2 module supports four external voltage input capture (voltage input range 0-5v)
3 module integration photoresistor can collect ambient light intensity by AD exact value
4 module integrated thermistor, the ambient temperature can be collected by exact numerical AD
5 module integrates a road 0-5V voltage input capture (via the blue potentiometer to adjust the input voltage)
6 modules with power indicator (for the module power indicator lights)
7 modules with output indicator DA, DA output interface voltage when the module reaches a certain value, the DA output indicator will light board, the greater the voltage, the more obvious indicator brightness;
8 Module PCB size: 3.6cm * 2.3cm
9 standard dual panel, thickness 1.6mm, nice layout, surrounded by a through-hole, aperture: 3mm, convenient fixed
Module Interface Description
This module left and right, respectively, 2-way pin external expansion interfaces, respectively, as follows:
DA output interface chip on the left AOUT
AINO chip analog input interface 0
AIN1 chip analog input interface 1
AIN2 chip analog input interface 2
AIN3 chip analog input interface 3
Pick the right SCL IIC clock interface microcontroller IO port
SDA IIC digital interface connected to the microcontroller IO port
GND module to an external ground
VCC Power Interface External 3.3v-5v
Red Hat use short-circuit module
There are three red module shorted cap, respectively role as follows:
Connect P4 P4 shorted cap, choose the access circuit thermistor
Connect P5 P5 shorted cap, choose the access circuit photoresistor
Connect P6 P6 shorted cap, select 0-5V voltage adjustable access circuit
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