Archive

Archive for October, 2016

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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Categories: Electronics Tags:

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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Access Raspberry Pi on Smartphone using VNC | RealVNC

October 15th, 2016 No comments

RealVNC: Remotely accessing Raspberry Pi Graphical Interface using smart phone. For this I have used VNC. In computing, Virtual Network Computing (VNC) is a graphical desktop sharing system that uses the Remote Frame Buffer protocol (RFB) to remotely control another computer. It transmits the keyboard and mouse events from one computer to another, relaying the graphical screen updates back in the other direction, over a network.VNC is platform-independent – there are clients and servers for many GUI-based operating systems and for Java. Multiple clients may connect to a VNC server at the same time. Popular uses for this technology include remote technical support and accessing files on one’s work computer from one’s home computer, or vice versa.VNC was originally developed at the Olivetti & Oracle Research Lab in Cambridge, United Kingdom. The original VNC source code and many modern derivatives are open source under the GNU General Public License.There are a number of variants of VNC[2] which offer their own particular functionality; e.g., some optimised for Microsoft Windows, or offering file transfer (not part of VNC proper), etc. Many are compatible (without their added features) with VNC proper in the sense that a viewer of one flavour can connect with a server of another; others are based on VNC code but not compatible with standard VNC.

Source: WikiPedia(bit.ly/2efyASt)


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Links :
Instructions for Pi : bit.ly/2e8IR3h
Real VNC : bit.ly/2dRlCx2
VNC Viewer Windows: bit.ly/2dRmemy
VNC Viewer App (Android): bit.ly/2dihwu2
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Connecting ESP8266 with Raspberry PI

October 7th, 2016 No comments

                                    Connecting the ESP8266 Wi-Fi module to Raspberry Pi.The ESP8266 is a low-cost Wi-Fi chip with full TCP/IP stack and microcontroller capability produced 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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Links :
Sparkfun AT Guide : bit.ly/2cEzSbv
Schematic : bit.ly/2dOBnS2
Py App : bit.ly/2dVHANy
Buy ESP8266 : amzn.to/2cZfUv8
Getting started with ESP8266 | AT Commands : bit.ly/2dBMjEq

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Raspbian Jessie | PIXEL | SEP-2016 Release | Explore

October 2nd, 2016 No comments

Raspbian is a free operating system based on Debian optimized for the Raspberry Pi hardware. An operating system is the set of basic programs and utilities that make your Raspberry Pi run. However, Raspbian provides more than a pure OS: it comes with over 35,000 packages, pre-compiled software bundled in a nice format for easy installation on your Raspberry Pi.

The initial build of over 35,000 Raspbian packages, optimized for best performance on the Raspberry Pi, was completed in June of 2012. However, Raspbian is still under active development with an emphasis on improving the stability and performance of as many Debian packages as possible.

Source : Raspbian (bit.ly/2dA3PIb)

 


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Links :
Download : bit.ly/2d4CGfK

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