PCF8591 ANALOG TO DIGITAL CONVERTER

The PCF8591 Module is an 8-bit, 4-channel ADC + 1-channel DAC with I2C interface. Supports up to 8 devices per I2C bus via 3 hardware address pins (A0, A1, A2). Onboard photoresistor, thermistor, and adjustable potentiometer allow standalone sensor experiments without external components. CMOS, single-supply, low-power design. Arduino-compatible.

Onboard Components:

• Photoresistor (light intensity via ADC)
• Thermistor (ambient temperature via ADC)
• Blue potentiometer (0–5V adjustable input via ADC)
• Power indicator LED
• DA output indicator LED

Interface Pins:

• Left: AOUT (DA output), AIN0–AIN3 (analog inputs)
• Right: SCL, SDA, GND, VCC (3.3–5V)
• Jumpers: P4 (thermistor), P5 (photoresistor), P6 (potentiometer)

Specifications:

• IC: PCF8591
• ADC: 8-bit, 4-channel (single-ended or differential)
• DAC: 8-bit, 1-channel analog output
• Interface: I2C
• Operating Voltage: 2.5–6V
• Max Devices per Bus: 8
• PCB Size: 3.6 × 2.3cm

Applications:

• Analog sensor data acquisition with Arduino via I2C
• Light and temperature monitoring experiments
• DAC-based signal generation for MCU projects