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Archive for 2016

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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Fetching data from server | Arduino/ESP8266

December 9th, 2016 2 comments

Arduino/ESP8266Arduino/ESP8266: Fetching data to Server (LOCAL and Online) using WifiClient on from the ESP8266 module using Arduino IDE.

The chip first came to the attention of western makers in August 2014 with the ESP-01 module, made by a third-party manufacturer, AI-Thinker. This small module allows microcontrollers to connect to a Wi-Fi network and make simple TCP/IP connections using Hayes-style commands. However, at the time there was almost no English-language documentation on the chip and the commands it accepted.The very low price and the fact that there were very few external components on the module which suggests that it could eventually be very inexpensive in volume, attracted many hackers to explore the module, chip, and the software on it, as well as to translate the Chinese documentation.
Source: Wikipedia (bit.ly/2cORmj0)

 

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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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Programming ESP8266 using Arduino IDE | ESP8266

November 26th, 2016 No comments

Programming ESP8266 using Arduino IDE.The ESP8266 is a low-cost Wi-Fi chip with full TCP/IP stack and microcontroller capability paroduced by Shanghai-based Chinese manufacturer, Espressif Systems.The chip first came to the attention of western makers in August 2014 with the ESP-01 module, made by a third-party manufacturer, AI-Thinker. This small module allows microcontrollers to connect to a Wi-Fi network and make simple TCP/IP connections using Hayes-style commands. However, at the time there was almost no English-language documentation on the chip and the commands it accepted.The very low price and the fact that there were very few external components on the module which suggests that it could eventually be very inexpensive in volume, attracted many hackers to explore the module, chip, and the software on it, as well as to translate the Chinese documentation.The ESP8285 is an ESP8266 with 1 MB of built-in flash, allowing for single-chip devices capable of connecting to Wi-Fi.

Source : WikiPedia (bit.ly/2cORmj0)
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Related VIdeos:
Getting started with ESP8266 : bit.ly/2fchgTc
ESp8266 with Arduino: bit.ly/2fclx8Y
ESP8266 with Raspberry Pi : bit.ly/2fchHgb
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Links :
ESP8266 Arduino Core : bit.ly/2fcezB9

Schematic : bit.ly/2fcgNR0
Buy ESP8266 : amzn.to/2cZfUv8

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Connecting ESP8266 with Arduino | AT Commands

November 20th, 2016 No comments

ESP8266Connecting the ESP8266 Wi-Fi module to Arduino. The ESP8266 is a low-cost Wi-Fi chip with full TCP/IP stack and microcontroller capability produced by a Shanghai-based Chinese manufacturer, Espressif Systems.

The chip first came to the attention of western makers in August 2014 with the ESP-01 module, made by a third-party manufacturer, AI-Thinker. This small module allows microcontrollers to connect to a Wi-Fi network and make simple TCP/IP connections using Hayes-style commands. However, at the time there was almost no English-language documentation on the chip and the commands it accepted.The very low price and the fact that there were very few external components on the module which suggests that it could eventually be very inexpensive in volume, attracted many hackers to explore the module, chip, and the software on it, as well as to translate the Chinese documentation.

The ESP8285 is an ESP8266 with 1 MB of built-in flash, allowing for single-chip devices capable of connecting to Wi-Fi.

Source: Wikipedia (bit.ly/2cORmj0)

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Custom Character Generator for MAX7219 based 8×8 LED Matrix

October 31st, 2016 No comments

In this video, I will show you a custom character generator for MAX7219 based 8×8 LED matrix. The app is developed using JAVA. If you are interested in making some updates to it you can check out my repository on GitHub. All links are provided below.

 

 

 

 

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Desktop app using JAVA to share to social media

October 27th, 2016 No comments

Thsi is a JAVA based desktop app that I use to share to social media accounts. I have used Facebook4J, Twitter4J like opensource libraries to make it work.Feel free to contribute to the repo…


Links:
GITHub Repo : goo.gl/Pz3D5z

Facebook4J:goo.gl/NivxPh
Twitter4J:goo.gl/sK1uG3
Facebook Developer :goo.gl/6TRS40
Twitter Developer: goo.gl/OLASFE
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Fedora 25 on Raspberry Pi | Let’s check it out

October 26th, 2016 No comments

Finally Fedora 25 beta version is out with the support for Raspberry Pi 2/3. Why not to give it a try ? In this video let’s check it out how it works.

Fedora /fᵻˈdɒr.ə/ (formerly Fedora Core) is an operating system based on the Linux kernel, developed by the community-supported Fedora Project and sponsored by Red Hat. Fedora contains software distributed under a free and open-source license and aims to be on the leading edge of such technologies. As of February 2016, Fedora has an estimated 1.2 million users, including Linus Torvalds, creator of the Linux kernel.

Source: WikiPedia(http://bit.ly/2dEUAFB)
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Links:

Release : bit.ly/2eq3dIa

OS Images : bit.ly/2dEHHQy

Win32 Sidk Imager: bit.ly/2faTtml
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Logic Level Shifter using 2N7000

October 23rd, 2016 No comments

The 2N7000 and BS170 are N-channel, enhancement-mode MOSFETs used for low-power switching applications. The two are nearly identical except that the leads are arranged differently and the current ratings are somewhat different; they are sometimes listed together on the same datasheet, along with other variants 2N7002, VQ1000J, and VQ1000P.The 2N7000 is a widely available and popular part, often recommended as useful and common components to have around for hobbyist use, along with such other popular discrete semiconductors as the 1N4148 and 1N4001 diodes; the 2N2222, 2N3904, and 2N3906 bipolar junction transistors; and the IRF510 power MOSFET.[2] The BS250P is “a good p-channel analog of the 2N7000.”Packaged in a TO-92 enclosure, both the 2N7000 and BS170 are 60 V devices, capable of switching 200 mA (2N7000) or 500 mA (BS170), with a maximum on-resistance of 5 Ω at 10 V Vgs.

The 2N7002 is a slightly higher resistance, lower current variant, in a TO-236 package, also known as “small outline transistor” SOT-23 surface-mount package, which is the most commonly used three-lead surface-mount package.

Source: WikiPedia (bit.ly/2dx71YW)
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Links :
Datasheet : bit.ly/2eiUOs6

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