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Digital to Analog /Digital to Analog Converter Module

DESCRIPTION

The PCF8591 module with I2C interface has 4 analog inputs, 1 analog output and

built-in LDR, thermistor and potentiometer.

PACKAGE INCLUDES:

• PCF8591 A/D and D/A Converter Module

• Qty 4 F/F jumper wires, 8″

KEY FEATURES OF PCF8591 A/D AND D/A CONVERTER

MODULE:

• 4-channel 8-bit analog-to-digital conversion inputs

• 1-channel 8-bit digital-to-analog conversion output

• Built-in LDR (Light Detecting Resistor)

• Built-in thermistor

Summary of content (4 pages)

PAGE 1
Digital to Analog /Digital to Analog Converter Module DESCRIPTION The PCF8591 module with I2C interface has 4 analog inputs, 1 analog output and built-in LDR, thermistor and potentiometer.
PAGE 2
• • • Built-in potentiometer I2C bus 3.3V and 5V logic compatible. This module is basically a reference design to show off some possible applications of the PCF8591 chip. It is a good learning module which incorporates both ADC inputs and a DAC output and includes basic sensors in a nice small inexpensive package. It also has some practical use in projects that can make use of the built-in features. DAC Analog Output The DAC output is connected to pin AOUT.
PAGE 3
J5 – Connects LDR to channel 0 (AIN0) J4 – Connects thermistor to channel 1 (AIN1) J6 – Connects the potentiometer to channel 3 (AIN3) Note that channel 2 (AIN2) does not have an alternate purpose, so no jumper is necessary. LDR – The Light Detecting Resistor (LDR) can detect basic changes in the intensity of the light striking it. A decrease in the amount of light hitting the sensor will cause an increase in the voltage on channel 0.
PAGE 4
Potentiometer – The 10K potentiometer is connected between Vcc and Gnd with the wiper connected to channel 3. Rotating the potentiometer will cause the voltage to vary between 0V and Vcc. Rotating the potentiometer CW decreases the voltage on channel 3. The potentiometer can be used as a general purpose analog control input. For instance, the potentiometer can be read and the DAC output driving the LED can be set to match the read value.