Information

Description

This is a Linker kit base shield for Raspberry Pi with ADC interface. All the Linker kit

modules can be plugged onto Raspberry Pi through this base shield. Moreover, this shield has

an on-board ADC chip so that analog output modules can be used on Raspberry Pi. The ADC

chip used is MCP3004. It talks to Raspberry Pi using SPI interface.

Specification

There are 8 4-pin 2.54mm spacing housing on the base shield:

 JP1: A0, A1, VCC, GND.

 JP2: A2, A3, VCC, GND.

 JP3: SCL, SDA, VCC, GND.

 JP4: RXD, TXD, VCC, GND.

 JP5: P17, P18, VCC, GND.

 JP6: P27, P22, VCC, GND.

 JP7: P23, P24, VCC, GND.

 JP8: P24, P4, VCC, GND.

These connectors cover Analog, I2C, and GPIO.

Install Base Shield on Raspberry Pi

PAGE 1
Description This is a Linker kit base shield for Raspberry Pi with ADC interface. All the Linker kit modules can be plugged onto Raspberry Pi through this base shield. Moreover, this shield has an on-board ADC chip so that analog output modules can be used on Raspberry Pi. The ADC chip used is MCP3004. It talks to Raspberry Pi using SPI interface. Specification There are 8 4-pin 2.54mm spacing housing on the base shield:         JP1: A0, A1, VCC, GND. JP2: A2, A3, VCC, GND.
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Schematics  Schematics Tutorial  Tutorial RPI ADC base shield 教程中文版 The ADC chip used on this base shield is MCP3004 (10 bit resolution, 4 channels, SPI interface). In the following, we are going to cover how to use Python to read the ADC output: As we use SPI communication, we need to enable SPI module in kernel. To do that, we can edit the blacklist of kernel, and enable spi: sudo vi /etc/modprobe.d/raspi-blacklist.
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sudo apt-get install python-imaging python-imaging-tk python-pip python-dev git Next, we will install spidev using pip: sudo pip install spidev Then we will install WiringPi (the driver for IOs on Raspberry pi, that can be used in C, shell script or Python, etc): sudo pip install wiringpi The interface python code for MCP3004 is as following: Import spidev Import time spi = spidev.SpiDev() spi.