• Arduino Code

    PCA9685 and Arduino example

    The PCA9685 is an I²C-bus controlled 16-channel LED controller optimized for Red/Green/Blue/Amber (RGBA) color backlighting applications. Each LED output has its own 12-bit resolution (4096 steps) fixed frequency individual PWM…

  • Arduino Code

    Using a LSM303 sensor with an Arduino

    The LSM303 3D Accelerometers/Magnetometer Models are a system-in-package featuring a 3D digital linear acceleration sensor and a 3D digital magnetic sensor. These best-in-class eCompass devices enable superior PDR or unique use…

  • Arduino Code

    Using the PCF8591 with an Arduino

    The PCF8591 is an 8-bit CMOS data acquisition devices. The PCF8591 has the four analog inputs, one analog output and a serial I2C bus interface. PCF8591 has three address pins…

  • Arduino

    Arduino bargraph example

    In this example we will connect and LDR up to our Arduino and display the reading on a bargraph display. A typical bargraph display looks like the one below, mine…

  • Espruino

    Espruino and I2C OLED display

    Just recently I spotted various I2C OLED displays on sale at reasonable prices and fancied trying to connect these up one of my Espruino. Being relatively small size, requiring only…

  • Espruino

    Espruino and DHT22 example

    In this example we use the DHT22 (or AM2302) humidity/temperature sensor and the Arduino UNO board to read data and print it out to the serial monitor. The DHT22 is better…

  • Espruino

    Espruino and LDR example

    A light-dependent resistor is a light-controlled variable resistor. The resistance of a photoresistor decreases with increasing incident light intensity; in other words, it exhibits photoconductivity. A photoresistor can be applied…

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