Archive

Posts Tagged ‘spi’

Information Display System using WeMOS and MAX7219

May 12th, 2017 No comments

This tutorial is all about making a WiFi based information display system using WeMOS

This tutorial is all about making a WiFi based information display system. This system is built around ESP8266 but not the standalone ESP8266 instead WeMOS is used and programmed using Arduino IDE. So In this video, we will check out how to make an information display system like that using Wemos and MAX7219 based dot matrix display modules. The display system fetches data from the local/online server and displays the received. In this system, u can display any data that you want and that’s up to you however over here I am using this to display my YouTube subscribers and twitter followers count.

 

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IIC (I2C) Communication on Raspberry Pi by using JAVA

January 27th, 2017 No comments

IIC

This tutorial is all about IIC (I2C) communication on Raspberry Pi by using JAVA and for that, I have used Pi4J library. To demonstrate this in the tutorial I have used MCP23017 Port expander IC with Raspberry Pi. MCp23017 is a 16 Bit input/output Port Expander ICcomes with I2C Interface. To interact with the IC suing IIC (I2C) port  here we have used Pi4J and JAVA.

MCP23017 Features:
16-bit input/output port expander with interrupt output
Cascadable for up to 8 devices on one bus
25mA sink/source capability per I/O
Supports 100kHz, 400kHz, and 1.7MHz I2C™Compatible compatible modes

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Thermocouple Interfacing usng MAX31855 | Raspberry Pi

December 20th, 2016 No comments

thermocouple MAX31855Reading thermocouple data on Raspberry Pi using JAVA and Pi4J with the help of MAX31855 14 bit thermocouple to digital converter. The MAX31855 performs cold-junction compensation and digitizes the signal from a K-, J-, N-, T-, S-, R-, or E-type thermocouple. The data is output in a signed 14-bit, SPI-compatible, read-only format. This converter resolves temperatures to 0.25°C, allows readings as high as +1800°C and as low as -270°C, and exhibits thermocouple accuracy of ±2°C for temperatures ranging from -200°C to +700°C for K-type thermocouples.

Source : MAXIM Integrated(bit.ly/2i3GvZ4)

 

 

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Send/Receive data using BLE and MBED | BBC Microbit

December 16th, 2016 No comments

BLE

This video is all about sending and receiving data between BBC Microbit and any BLE enabled smart phone. Over here I have used C/C++ (MBED) as the programming language as other language (Python/JavaScript) don’t support UART data transfer service.

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Programming using C/C++ (MBED Offline IDE Setup) | BBC Microbit

December 6th, 2016 No comments

mbed offlineThis tutorial is around BBC Microbit and programming the microbit using MBED offline C/C++ IDE but for this, I have used Yotta command line tool provided by MBED for building the code. This lets you explore many features of the microbit which otherwise are not accessible.

 

 

 

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Checking out BBC micro:bit

October 19th, 2016 No comments

The BBC micro:bit is a pocket-sized, codable computer that allows anyone to get creative with technology. Made possible through a major partnership with 31 organisations, a micro:bit has been given to every 11 or 12 year old child in year 7 or equivalent across the UK, for free.

 

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Can be programmed with high-level online IDEs using the BBC’s website at www.microbit.co.uk/create-code including:
Microsoft TouchDevelop IDE
Microsoft Blocks
CodeKingdoms Javascript
MicroPython
mbed enabled
Online IDE at developer.mbed.org
Easy to use C/C++ SDK
Dedicated micro:bit runtime libraries for rapid development (developed by Lancaster University)

Nordic nRF51822
Multi-protocol Bluetooth® 4.0 low energy/2.4GHz RF SoC
32-bit ARM Cortex M0 processor (16MHz)
16kB RAM
256kB Flash
Bluetooth Low Energy Master/Slave capable
Input/Output
25 LED Matrix
Freescale MMA8652 3-axis Accelerometer
Freescale MAG3110 3-axis Magnetometer (e-compass)
Push Button x2
USB and Edge connector Serial I/O
2/3 reconfigurable PWM outputs
5 x Banana/Croc-clip connectors
Edge connector
6 x Analog In
6-17 GPIO (configuration dependent)
SPI
i2c
USB Micro B connector
JST power connector (3v)

Source : Mbed (goo.gl/dTBWGi)

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Links :
Website : goo.gl/xynZ29
Hardware: goo.gl/DK5QbO

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