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MakeInAxom: inverters reaching to villages OCT2017

We were covered in

 http://achhikhabre.com/kaushik-hazarika-sohoj-electronics-make-in-india-make-in-assam/

Who made the case ?
 Well I have handmande every case . Used strongest resin glue for front panel .
 The cabinets have  a screwless look and sleek feel . Here is a real image :




  Many months of research for low cost inverter has given proven results . As I approached the poor to deliver 11-12hours of full light via a inverter the response was phenomenal .

Faults issues and more fixes .........

Do the inverter have issues ? yes as of now 2 issue exist

1)if there is heavy spark at load the backEMF  fries the low cut chip

2)no load voltage shoots to 400V so may fry few LEds but is the bulbs are secured they
are not of that big concern  , the mass delivery version will have the fixes for these .



projects:Designing a cut off 12V charger with TL431

About TL431   :

The TL430, was introduced as an adjustable shunt regulator in 1976 by  Texas Instruments.

The TL431 was created as an improvement to TL430 with better accuracy and stability and was called a precision adjustable shunt regulator. The TL431 was announced as a future product in 1977 and launched in 1978
The TL431 is a three-terminal adjustable regulator series with a guaranteed thermal stability over applicable temperature ranges. The output voltage may be set to any value between VREF (approximately 2.5 volts) and 36 volts with two external resistors These devices have a typical dynamic output impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excel lent replacement for zener diodes in many applications.
Lets use the voltage calculator tool:



Link :  http://www.electronics2000.co.uk/calc/potential-divider-calculator.php

circuitbasics :আইচি বোৰৰ পিন কেনেকে উলিয়াবা

Open up a television or a radio and you'll see many parts that it's built around a printed circuit board (PCB): a bit like an electric street-layout with small circuit components (such as resistors and capacitors) in place of the buildings and printed copper connections linking them together like miniature metal streets. Circuit boards are fine in small appliances like this, but if you try to use the same tricks alike to build a complex electronic machine, such as a computer, you quickly hit a snag. 
So to get the  best of the small space IC or 
integrated circuit


Lets learn how to get the pins to follow a circuit diagram 


This is 555 EGG timer  it will shut off egg heater after time delay or it will BUZZ 


Lets  find the  pins of the IC ! 




555timer টোৰ পিন দেখাইছো , কাত তোৰে বাওঁপিনে ১নং পিন ... তাৰ পৰা ২,৩,৪...
একে দৰে CD4017(runing led IC) টোত পিন দেখিবা
link:
http://www.electronicecircuits.com/wp-content/uploads/2010/11/CD4017-Counter-Divider-pin-Configuration-4017.jpg
কেতবোৰ আইছি দে…

BITCOIN কিনি ধনী হওঁক ৩০দিনত

BITCOIN electronic 'CRYPTO'currencyসেই টকা পইচাৰ মুদ্ৰাৰ সলনি বিতকইন আহিছে .... ইয়াৰ বাবে কোনো বেংক

নাই কোনো দেশৰ চৰকাৰ কন্ত্ৰল নাই সেইবাবে ইয়াক পঠাই দিওতে  টেক্চ হিচাবত কনমানো কাত 
নাজায় ।


Why know about bitcoin ?
The digital money trade is steadily heading towards immersion in the North American and European markets. One of the significant drivers of the market has been opportunity from keeping money wallet from hidden taxes and easy to open and keep up a financial balance that is fast raising . The immature managing an account framework in Asia and African market, conversely, fundamentally higher development chances to digital money exchanging stages. While a considerable measure of digital money trade organizations done recent quarter on more immersed Western market, the push to promote bitcoins in Asia and Africa obviously after that wannacry event .
১লাখ টকা বিতকইন এবছৰ আগৰ এতিয়া ৪লাখ হৈছে

recent reports AUG -OCT : 


1bitcoin =1.81Lakh rupees (1Aug) 

370360.69 Indian Rupee(TODAY …

GALAXY NOTE 8 is way ahead of iPHONE8

Many  features of note8 that pushes IPHONE 8 tobe a failure. In india the iphone8 sales and bookings registered too low, they blame it on iphone x. But reality is lack of innovation .


The basic nerve of all new  smartphone buyers rests on innovation .
The  cell markets are flooded with better players in android  arena. The samsung note 8 is a stunning example . Following are some new innovations that note8 has come up with which makes apple device a thing of the past :

 Infinite display : as they promised a stunning looking screen innocation .
 camera innovation : 12MP cameras on the back that both feature Optical Image Stabilisation.
 Additionally, the two sensors also feature Samsung’s Dual Pixel technology and Phase Detection Autofocus.

App innovation : pair of apps can be launched together,This feature opens both the apps in split screen mode, allowing you to do two tasks faster than ever before.

The deXdock : The dock caters full screen monitors and has been there for some time  . T…

AIRTEL 1399Rs 4g phone (Hidden 6000Rs cost)

লওঁতে ৩০০০টকা ভৰিব  ( ১৩৯৯/- এফেক্তিফ প্ৰাইচ মানে 3year refund আদিত চেভ হৈছে বুলি কিবা হিচাব) ৩ বছৰে ৬০০০টকাৰ ৰিচাৰ্জ কৰিবই লাগিব তাৰ পিছত ১৫০০/- ঘুৰাই দিব          কিন্তু একাউন্তলৈ নহয় ! পেমেন্ত ৱালেতলৈ হে  JUST TWO REASONS NOT TO BUY IT

1) JUNK KARBONN MOBILE 
Really looting 6000Rs for a bad karbonn phone .karbonn is a bad cellphone company . many defects in all devices  . They have tied to airtel to dump waste model to desi ciustomers . 



প্ৰথম হৈছে ফন কোৱালিতি  ই কাৰ্বনৰ নিম্ন মানৰ হেন্দচেত ... কিবাকে ৪জি কৰিছে । কাৰ্বন সকলো ফন লাখ দিফেক্ত ওলাই কম্পনি বন্ধ হৈ পৰিব ওলাইছে ।
 ১গিগাহাৰত্জ(1Ghz cpu) প্ৰচেচৰ ফন বোৰ ডাস্টবিনলৈ পেলাব ধৰিছে
 বাবে এয়াৰতেলে কুশলেেৰে সেই সোপা মানুহক বেছিবলে প্লেন কৰিছে ।

2)AIRTEL has been LOOTING CUSTOMERS 
Really looting 6000Rs for 3 years plan that takes money a "must do " recharge! .This way the company is working no ethics just cheap tricks .  
জীয়ই(RELIANCE JIO) ৩০জিবি দৈনিক ডাটা দিউতে , এয়াৰতেলে
৩০জিবি প্লেন দিছিল । কিন্তু ৫০০ mb হে পেকত আছিল ..…

EXtract ceiling fan electricity for nice table lamp !

ceiling fans have a rotational energy that is wasted ... a feewsmalle magenets and coils can be used to extract that .



say we can extract 3watts from 70watt fan ....

that three watt is good for 7hours in SOHOJ LED lamp ( visit our group files section)

Iphone8 Battery fire !

SAMSUNG GALAXY NOTE  - ফুতি জুইলাগিছিল .... এতিয়া আইফন ৮ (latest iphone 8)  কেনেকে? ৭ দিন হোৱা আইফন কেইটা বেতেৰী ফুলি কেচ খোল খাইছে ... টকা গল পানীত ? সময় কব বেতৰী ফুলা ২ টা কাৰন  হ'ব পাৰে  -- বেতেৰী দিফেক্ট বা চাৰ্জাৰৰ ইলেক্ট্ৰনিক প্ৰব্লেম  বেতেৰী ফুলি বিস্ফোৰনও হব পাৰে 
NEWS link : https://www.macobserver.com/news/iphone-8-plus-battery-swelling/

Arduino Board for beginners (অসমীয়াত)

Arduino Board
Arduino processor board :সকলোৱে বনাব পৰাকে সৰলকৈ ছফতৱেৰ লিখিব পৰা এক প্লেতফৰ্ম মানে শিকিবলে ব্যৱহাৰ কৰা সজুলি   আপোনাৰ ল'ৰাক কালিৰ সুদক্ষ ইন্জিনিয়াৰ কৰিব বিচাৰিছে , আৰদুইন আনি দিয়ক ..  ই এক বৰ্দ য'ত আপুনি  একা সৰু ৮-বিট প্ৰচেচৰ মগজু প্ৰগ্ৰাম কৰা সকলো সজুলি আছে , ইয়াত ৯ ভল্ট বা USB(5v from pc /laptop)ত চলা সুৱিধা কৰি দিছে । USB CABLE ৰে পোনতে লগাই প্ৰগ্ৰেম লদ কাৰিব পাৰে Ready library programs super easyকে তৈয়াৰ কৰিছে যাতে স্কূলৰ লৰাইও বনাই শিকিব পাৰে Arduino হৈছে অপেন হাৰ্দৱেৰ ছিচতেম , মানে সকলো বিবৰন , ডায়েগ্ৰাম দিয়া আছে  সকলোৱে ব্যৱহাৰ বা সলনি কৰিব পাৰে  Arduino is a processor board that can  be used to program and learn electronics -- 

-works with usb 
-open hardware , all diagram available 
-best way to learn electronic and embedded hardware 
-schoolkids can program , as all programs have library to help with 
 complex task 

 Example to show a text in LCD other board u have to program 

 30complex lines of code . Here you can say LVD.text("DISPLAY THIS") 

and i…

bestBT speakers 2017

The bluetooth speaker is a very popular  item among young generation

 and there are 1 million varieties. It is  device with inbuilt

Amplifier Batterycharger and battery wireless module MP3 USB SDcard module  color LED driverPower control circuit


The components that are AMPLIFIER ,  SPEAKER DRIVER , CASE  etc really make the sound very good or worse . 
- Look for reputed but not too expensive brands  - Look for a real decent sized one , although small will look cute but sound will not be great for sure   an attractive but bad sounding speaker is as below
-NEVER  buy seeing PMPO ! its is a fake rating even philips and sony use that
-if secifications available see wattage , a 4-5watt speaker is recommended  

We have listened to speakers that were priced in 1200-1700Rs and found the following very well made with good audio quality .


ZOOK series : ELITE is one nice speaker  1300Rs


Portronics : The POSH is one good speaker .

POSH is also equipped with AUX-IN which lets you connect your devic…

৭টা কাৰন : ভুলুৱা মাৰ্কেতিঙলৈ ৭০০০০/- দি IPHONE 8 নিকিনিব

১)আইফন সদায়ে ৩ পৰা ৮গুন বেছি দামত এৰে ,
-  মানুহৰ মনত চাপ পেলোৱা মাৰকেতিং
 - সদায়ে আইফন "Future in hand " আনিছে কয়
  ১-২মাহতে  সেই টেকনলজী সকলো মবাইলত পায় 

২) কেবল , চাৰ্জাৰ ২-৩ গুন দাম - অৰিজিনেল কেবল কাতিলে ১৪০০/- মানত হে উন্নত কেৱল পাব ,
-  সেইদালো ৫মাহত কাতিব পাৰে ... Android data কেবল ২০০ /- 
 Expensive Screen LCD 
-ভাগিলেই ধৰক ১০০০০/- ১৫০০০/০ দিব সাজু থাকক । 
 এন্দ্ৰইদৰ  স্ক্ৰিন সহজতে ৪০০০/-ত পায়েই ।   তাৰোপৰি আইফন স্ক্ৰিন ২-৩টা নকল কোৱালিতি আছে গতিকে পৰিলেই   শেষ  আইফন !  ৩) "একো ডাউনলদ কৰিব নিদিয়ে"Download songs  মাৰক linkনাপায় 
All songs must be paid or downloaded via iTunes .Free ones are new comer artist songs and 
with limited variety 


৪) কোনো mp3 off line music  app or not good quality like android apps নাই তাৰ মানে সকলো প্লেয়াৰে দাতা খাই ৰব
-কিবাকে গান পিচিপৰা ভৰাই শুনিবলে এপ বোৰ  পোৱা  টান 
 সকলো এপ অনলাইন গান প্লে হে লৰে ...   ১০% এপ আছে মেমৰিত শুনা , কিন্তু এদ মাজে মাজে ওলায় , নাইবা কিবা ফীচাৰেই নাই তেনে 


 ৫) কোনো ফাইল ব্ৰাউজাৰ (pc file  browser)  নাই কেবল ফতো …

মিনি টাৰবাইন আৰু অসমৰ বিদ্যুৎ

সহজ ইন্ভাৰ্তা্ৰে ৩০০মিলি হে লয় চাৰজ হবলে .. তাৰ মান .৫ মেগাৱাত হলৈ মোৰ মতে ১ক গাওঁ বেকাপ দিব দিগদাৰ নাই তাতে পিক' কৈইটা নানা জান জুৰিত পাৰি বহাব

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সহজ ইন্ভাৰ্তাৰ বিষয়ে জানিবলে ... ইয়াত   link-MAkeINAXOM Article মেক ইন অসম ৰ ধাৰনা দিছোঁ , পঢ়ি চাব 

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মিনি টাৰবাইন প্ৰকল্পসমূহে (tiny Hydro-power Plant) অতি কম খৰচতে ০.8ৰ পৰা ৫ কিলোৱাট electric power উৎপাদন কৰিব পাৰে। এই শক্তি 2খন সৰু গাওঁ বা এটা চুবুৰিক পোহৰ কৰিবৰ বাবে হৈ যায় । এনে প্ৰজেক্ত নেপালত চলি আছে সফলতাৰে ! (ফ্ৰিজ, হিটাৰ আদি নাই বুলি ধৰিলে)।



 কোনো বান্ধ বা কৃত্ৰিম জলাধাৰ নাই বাবে পৰিবেশৰ ওপৰতো মুঠেও কুপ্ৰভাৱ নাই। মেৰামতি, পৰিচালনা আদিৰ খৰচো যৎসামান্য।
এনে পিক’ জলবিদ্যুৎ প্ৰকল্পত ১.৫ৰ পৰা ৩.৫ মিটাৰ ব্যাসৰ এটা ক্ষুদ্ৰ টাৰ্বাইন আৰু পানীৰ সোঁতত আৰু ০.৫ ৰ পৰা ৫ কিলোৱাট ক্ষমতাৰ এটা সৰু জেনেৰেটৰেই যথেষ্ট। আমাৰ অসমত অলেখ সৰু সৰু নদী। একোখন গাওঁক কমেও ১ কি.মি. হলেও চুই যাই এখন নদীয়ে। নৈ-পৰীয়া প্ৰতিখন গাওঁত এনে পিক’ জলবিদ্যুৎ প্ৰকল্প ৪-৫ টা স্থাপন কৰিলে আমাৰ বিদ্যুত সমস্যা বহু পৰিমাণে সমাধান হ’ব।

Save 2000Rs on fridge electric bills (ফ্ৰীজ circuit)

আপোনাৰ নজনাকে বহুত বিল কৰি আছে কাৰণ ফ্ৰীজ thermostat -১৫
ডিগ্ৰী মানত থিক কৰা থাকে,ই বৰফৰ চেম্বাৰটো মনিতৰ কৰি থাকে
যদি বৰফ দৰকাৰ হোৱা নাই কিয় এক্স্ত্ৰা বিল দিব ?
Note: Thermostate এ ফ্ৰীজ compressor অন অফ কৰে
ইয়াক লগাই -1 degree মানত Adjust কৰক , বহুত বিল বছাব পাৰিব


সহজ ইন্ভাৰ্তাৰ tubine concept বিষয়ে জানিবলে ... ইয়াত   link-MAkeINAXOM Article মেক ইন অসম ৰ ধাৰনা দিছোঁ , পঢ়ি চাব 




Slave robot ? that do not look like robot

Cleaning your house is one repetitive work that your wife does , maid does but now robos will do that.
It is not new technology but it is becoming fast popular ....these robots have special features  ৰবটে ঘৰ  চাফা দিব পৰা হৈছে ...  পত্নীৰ কামও কৰি দিব .. এইবোৰ ভাৰতএমাজন ত for sale  দিছে ....


 ইয়াত ভেকুৱাম , জাৰু , অটমেতিক চেনচৰ , ৩৮০০মিলি বেতেৰী আদিৰে ফিত কৰি দিয়ে । ই নিজেই ৰুমত ঘুৰি ধুলি লেতেৰা চাফ কৰিব । 

নানা মদেলত মবাইলেৰে কাম দিয়া ব্যৱস্থাও  কৰি দিছে ! ই বেতেৰী কমিলে নিজ চাৰ্জাৰলৈ নিজে যায় .... 

কেতামান অসুৱিধা 

-  চুক কান নোৱাৰে চাফ কৰিব ,- লেগ বা চকী বেছি থকা জেগাত নোৱাৰে ,  এক ৰুমত ১ক ৰবত লাগে  ! Obstacle detection sensing limit switch at the front.that makes it to turn back and go other areas . Infrared detector for checking carpets and bumpy obstacles and docking station.Wheel drop sensor. and auto charge itself program Lithium metal-hydride rechargeable battery pack (14.4 volts and 3600mAH etc are in thrend ). This is light and looong lasting treaded wheels provide extra tract…

স্পিকাৰ নাই 99% screen ? 2017 technology

Xiaomi Mi Mix was reportedly an initial concept phone . However , with the huge interest and praises it received , the tech giant decided to make it part of their consumer line .



The borderless concept of the Xiaomi Mi MIX has huge attraction .

People  wanted more screen not much speaker grills and this peaked the interest for the said gadget . 

The Xiaomi Mi MIX is not 100% borderless , but among all the gadgets in the market right now , it is the leading one when it comes to aspect ratio display . With a whooping 91 .3% of display space , Xiaomi Mi MIX boasts of an almost all-screen display gadget . 

Xiaomi Mi MIX : How the sound comes out without speaker holes 

Well we all hold the cell close to our ears .and here the ceramic drive plays it part
এই ছামি মবাইলত কোনো স্পিকাৰ নাই কেনেকে কাম কৰে ?  ইয়াত পিজো দ্ৰাইভ আছে , ই নিজ বদিকে স্পিকাৰ কৰি অদিঅ দিব পাৰে 

গ্ৰাহকে ইমান ভাল পোৱা নাই কিন্তু ই দেখাত স্টাইলিছ সেইবাবে ,ইয়াক বহুতে লৈছে 

The 6 .4 inch display is complemented with a 2040×1080 pi…

walkie takies :squelch detection circuit

squelch detection circuit
:
making walkie takies .. it will mute the hiss sound and allow only clean audio
when recieved
ধৰক ৱাকি তকি এতা বনাই গাৰ্ল ফ্ৰেনক দিলে অন কৰাৰ লগে লগে চৰচাৰাই নইজ আহিল তেনে হলে তো নহব ,
প্ৰিয়জনৰ মাত সাৰৰ বাহিৰে বাকী নইজ (no transmission)কাতি দিব এই চাৰকিতে
A nice walkie : https://www.youtube.com/watch?v=y08ygGQronM
author dint gave circuit


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Engineer Fresher jobs Job title : Manufacturing Engineer I New College Graduate - (E1)-1704901

Company :Applied materials http://www.appliedmaterials.com/
Description :
Manufacturing Engineer I New College Graduate - (E1)-1704901
Apply email : info_india@amat.com


Java IVR Developer
Job title : Manufacturing Engineer I New College Graduate - (E1)-1704901
Company:Infosys India Software
Description :
• Bachelor’s degree or foreign equivalent required from an accredited institution. Will also consider three years of progressive experience in the specialty in lieu of every year of education.
• At least Training JAVA  experience w…

মবাইল বেষ্ট ফটো কেনেকে তুলিব

Tips what will help make a good image a great image in cell phone are topic of today .

Following you must observe :

Check to keep off the shadows that sunlight makes on subjects.(ছাঁ পৰি ৰোৱা ছবি বেয়া হয় ) Place the reflective light off buildings. (লাইত ৰিফ্লেক্ত কৰা সামগ্ৰী আতৰাই ৰাখক, যেবে কিবা চিলভাৰ কালাৰ বেগ , আইনা )Practice during the "golden hour. " shortly after sunrise or before sunset (পুৱা ৰঙচুৱা ৰ'দ বা  গধুলি সুন্দৰ হৈ পৰে সকলো ফটো )
 Find how the light from a window falls within a room.(খিৰিকিৰে লাইত কোন দিশে পৰিছে তাক  চাই লব ভাল ফতো হব)The smart telephone is not the very best in little light situations(কম লাইত মানেই ফতো বেয়া ). Dont ever use the zoom on your smart phone.(জুম কৰিলেই কোৱালিতি বেয়া হয় কাৰন সফ্তৱেৰত হে হৈ পৰে )Remember that. Best to capitalize on when your device functions best(কিমান লাইতত ভাল  আহে চাব লৈ , কেবাটা তেষ্ট ইমেজ লৈ গম কৰি লব  নানা লাইত  লৈ এই কাম কৰিব পাৰে  টেবুল লেম্প , টিওব , দুপৰিয়া , ম'মৰ পোহৰ । )          under what light…

you said Joule Thief?

you said Joule Thief? you said Joule Thief? 

It’s a little wisp of a circuit that allows you to drive aPOWER  LED from a low voltage. Normally, if you want to light up a blue or white LED you need to provide it with 3 – 3.5 V, like from a 3 V lithium coin cell.


But the magic of JT is  a 1.5 V battery like a AA cell simply will work. 
Easy make  Joule Thief,  works like a charm. Not only does it work with a brand new battery, but it works until the battery is nearly dead– down to 0.3 V. 

That’s well below the point where your other toys will tell you the battery is dead, so it can steal every last joule of energy from the battery (hence the name).

how about a cellphone charger , yes it is doable , we are here to give you  a usable tested diagram .


get  the ring toroid from a OLD smps of pc ! 

buzz! boom

------

Engineer Fresher jobs Job title : Manufacturing Engineer I New College Graduate - (E1)-1704901

Company :Applied materials http://www.appliedmaterials.com/
Description :
Manufacturing Engineer I New College Graduate - (E1)-1704901
Apply email : info_india@amat.com


Java IVR Developer
Job title : Manufacturing Engineer I New College Graduate - (E1)-1704901
Company:Infosys India Software
Description :
• Bachelor’s degree or foreign equivalent required from an accredited institution. Will also consider three years of progressive experience in the specialty in lieu of every year of education.
• At least Training JAVA  experience with Information Technology
Manufacturing Engineer I New College Graduate - (E1)-533525

Apply email : jaa_barta@infosys.com

40seconds printed circuit boards Trick here !

Vivo V7 phone Ya kasra !

Vivo V7  Vivo Electronics Corp. is a phone brand based in Dongguan, Guangdong, China. It was founded in 2009. The company is another Chinese smartphone maker but this one spends more on dealer commission and IPL 
To make the markets flooded with choices , they sale too many models . 
Do you know vivo and OPPO are same cell companies . 
Avid indian buyer  gets confused . 
Vivo  tries to copy flagship product samsung/xiaomi  but it fails there are lots of segments 


But to market the  vivo guys have many many  online comparision of OPPO Vs VIVO 

1. Snapdragon 635 which heat phone very fast
2. Still screen resolution is low
3. Ram is low
4. No direct video call
5. Battery capacity low for that price 
6. Camera focal lens is poor
7. Camera pics are over processed in software , look unnatural

Lets Learn on Circuit RELAY | ৰিলে কি? চাৰ্কিতত কেনে ধৰনৰ ব্যৱহাৰ হয়

চিনাকি হওঁ  এক  দৰকাৰী চাৰ্কিত অংশ ৰিলে(circuit Relay) :

সাধাৰণ ভাৱে কি ? 


ই এক ইলেক্ট্ৰ'মেগনেট, ,.. ইয়াৰ দুতা চাইদ থাকে
ক)কন্ট্ৰলকইল
খ)কন্টেক্ট, চাইদ


সচৰাচৰ ৩তা কন্টেক্টক অন অফ কৰিবলে লগায় ...
মানে একে সহজ কইলত ভল্টেজ দিলেই কমন পইত ইতোত লাগিযায়
NC(normally connected)-- commonpoint এনেয়ে যত লাগি থাকে
NO(normally open) -- commonpointকইলত ভল্তেজ দিলেই লাগে ইয়াত .. তেতিয়া NCৰপৰা এৰায়
কিমান ভল্তেজ দিব কইলত ?
সচৰাচৰ ১২ বা ৬ভল্টৰ হয় .... 
ভিতৰত কিকি আছে ? 




 ডিচি কন্ত্ৰল কৰিব ৰিলে নলগাব , মচফেত(MOSFET)  দিব
(কমপেক্ট আৰু সহজে কাম কৰে)


ক'ত ব্যৱহাৰ হয় ?












সচৰাচৰ ব্যৱহাৰ কৰা ৰিলে হৈছে SUGAR CUBE RELAY  Buy link : http://www.electroncomponents.com/Mini-Components/Relays/6V-7A-PCB-Relay-SPDT