1. Module chip using PCF8951
2. Module supports external voltage input of the 4-way acquisition (voltage input range of 0-5v)
3. The module integrated photoresistor by AD collection precise value of the ambient light intensity
4. Module integrated thermistor by the precise value of the ambient temperature of the AD acquisition
5. Module integrated 1 channel 0-5V voltage input acquisition (the blue potentiometer to adjust the input voltage)
6. Modules with power indicator (for the module power supply indicator lights)
7. Modules with DA output indicator, when the module DA output interface voltage reaches a certain value, will be lit panel the DA output indicator, the higher the voltage, the more obvious indicator brightness

PCF8591 IC Features

1. Single power supply
2. A PCF8591 operating voltage range of 2.5V-6V
3. Low standby current
4. Via I2C bus serial input/output
5. PCF8591 by 3 hardware address pins addressing
6. PCF8591 I2C bus speed sampling rate decided
7. 4 analog inputs programmable single-ended or differential input
8. Automatic incremental channel selection
9. PCF8591 analog voltage range from VSS to VDD
10. PCF8591 built-in track-and-hold circuit
11. 8-bit successive approximation A / D converter
12. 1 analog output DAC gain

Module Features

1. The module supports external voltage input of the 4-way acquisition (voltage input range of 0-5v)
2. The module integrated photoresistor by AD collection precise value of the ambient light intensity
3. Module integrated thermistor by the precise value of the ambient temperature of the AD acquisition
4. Module integrated 1 channel 0-5V voltage input acquisition (the blue potentiometer to adjust the input voltage)
5. Modules with power indicator (for the module power supply indicator lights)
6. Modules with DA output indicator, when the module DA output interface voltage reaches a certain value, will be lit panel the DA output indicator, the higher the voltage, the more obvious indicator brightness
7. Module PCB size: 3.6cm x 2.3cm
8. A standard double panel, thickness 1.6mm, nice layout, surrounded by a through-hole, aperture: 3mm, convenient fixed.

Module interface specification

The Left

1. AOUT chip DA output interface
2. AINO chip analog input interface 0
3. AIN1 chip analog input interface 1
4. AIN2 chip analog input interface 2
5. AIN3 chip analog input interface 3

The Right

1. SCL – IIC clock interface connected to microcontroller IO port
2. SDA – IIC digital interface connected to microcontroller IO port
3. GND – connected to ground
4. VCC – connected to 3.3v-5v

Four red jumper-cap instruction

1. P4 – connected to P4 shorting cap, select thermistor access circuit
2. P5 – connect P5 shorting cap, select photoresistor access circuit
3. P6 – connected to P6 shorting cap, select 0-5V adjustable voltage access circuit

This is a breakout board/Prototype Board for PCF8591 IC. The PCF8591 Module Analog to Digital / Digital-Analog Converter Module with F-F Jumper Wire is a single-chip, single‑supply low‑power 8‑bit CMOS data acquisition device with four analog inputs, one analog output, and a serial I²C‑bus interface. Three address pins A0, A1, and A2 are used for programming the hardware address, allowing the use of up to eight devices connected to the I²C‑bus without additional hardware. Address, control, and data to and from the device are transferred serially via the two-line bidirectional I²C‑bus.

The functions of the device include analog input multiplexing, on-chip track and hold function, 8-bit analog‑to‑digital conversion, and an 8‑bit digital‑to‑analog conversion. The maximum conversion rate is given by the maximum speed of the I²C-bus.