Raspberry Pi

Raspberry PI and MMA8451 accelerometer example

The MMA8451 is a low-power accelerometer with 14 bits of resolution, with the following features: Embedded functions with flexible user-programmable options, configurable to two interrupt pins Embedded interrupt functions for overall power savings relieving the host processor from continuously polling data Access to both low-pass filtered…

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Raspberry Pi and TCS34725 Color Sensor

The TCS3472 device provides a digital return of red, green, blue (RGB), and clear light sensing values. An IR blocking filter, integrated on-chip and localized to the color sensing photodiodes, minimizes the IR spectral component of the incoming light and allows color measurements to be…

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A look at the unicorn pHat

The unicorn pHat is a hat which althoough designed for the Pi Zero also works on other Raspberry Pi’s and has 32 RGB LEDs. There is a python library available for it and also a couple of C examples as well in the github repository…

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Raspberry Pi and a PCF8591 example

The PCF8591 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…

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Raspberry Pi and PCF8574 example

The PCF8574 is an 8 bits I/O port expander that uses the I2C protocol. Using this IC, you can use only the SDA and SCL pins of your Arduino board to control up to 8 digital I/O ports. A0,A1,A2 are address pins P0,P1,P2,P3,P4,P5,P6,P7 are digital…

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Raspberry Pi and HDC1008 temperature sensor

The HDC1008 is a digital humidity sensor with integrated temperature sensor that provides excellent measurement accuracy at very low power. The device measures humidity based on a novel capacitive sensor. The humidity and temperature sensors are factory calibrated. The sensing element of the HDC1008 is…

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Raspberry Pi and BMP180 sensor

This bmp180 from Bosch is the best low-cost sensing solution for measuring barometric pressure and temperature. The sensor is soldered onto a PCB with a 3.3V regulator, I2C level shifter and pull-up resistors on the I2C pins. The BMP180 replaces the BMP085. Specification Pressure sensing…

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Raspberry Pi and L3GD20 sensor

The L3GD20 is a low-power three-axis angular rate sensor. It includes a sensing element and an IC interface capable of providing the measured angular rate to the external world through a digital interface (I2C/SPI). The IC interface is manufactured using a CMOS process that allows…

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Raspberry Pi and MMA7455 example

The MMA7455L is a Digital Output (I2C/SPI), low power, low profile capacitive micromachined accelerometer featuring signal conditioning, a low pass filter, temperature compensation, self-test, configurable to detect 0g through interrupt pins (INT1 or INT2), and pulse detect for quick motion detection. 0g offset and sensitivity…

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