KAmodPCA9533 is a module with LED dimmer from NXP. The board is equipped with a Pmod I2C standard connector and a KAMAMI connector, that allow to easy connection of the module to the evaluation kits. Due to its small dimensions, the product can be used in many development projects, while the Pmod loop connector allows to connect the boards in the series.

KAmodPCA9533 modul.png
Basic features and parameters
  • PCA9533 chip from NXP
    • 4 LED brightness control
    • Two programmable blink rates and duty cycles coupled to the output PWM with frequency from 0.591 Hz to 152 Hz
    • 256 brightness steps
    • Pins not used as LED drivers can be used as regular GPIOs
    • Internal oscillator
    • I2C-bus interface
  • Connector compatible with the Pmod standard, allows serial connection of Pmod I2C modules
  • The connector complies with the KAMAMI standard
  • Embedded jumpers activating pull-up on I2C bus lines
  • Possibility to supply voltage from 2.3...5.5V
  • Mounting holes with a diameter of 2.5mm
  • Dimensions: 61.2mm x 20.3mm x 10mm
Standard equipment
Code Description
  • Assembled and launched module
Electrical schematic
KAmodPCA9533 schemat.png
Output description - Pmod standard connector
KAmodPCA9533 obrys zlacze.png
JP1 (male connector) JP2 (female connector) Function
VDD VDD Power supply of module (max. 3,6 V)
SDA SDA Data line of I2C bus
SCL SCL Clock line of I2C bus
Output description – KAMAMI standard connector
KAmodPCA9533 obrys zlacza kamami.png
Pin number Function
1 (VDD_5V) Power supply of module (max. 5,5 V)
2 (SCL) Clock line of I2C bus
3 (SDA) Data line of I2C bus
4 (GND) Ground
I2C bus lines

The KAmodPCA9533 module is equipped with jumpers allowing to connect pull-up resistors to the positive power pole to the I2C bus line. The jumpers give the possibility of independent enabled of the pull-up for the SDA and SCL lines.

KAmodPCA9533 obrys i2c.png

The KAmodPCA9533 module is equipped with an RGB OSTBMAS2C1A diode with a common anode. The diode is connected to the LED0, LED1 and LED2 pins of the PCA9533 chip with the use of current limiting resistors.

KAmodPCA9533 obrys i2c.png
KAmodPCA9533 wymiary PCB.png
External links