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12v Solar DC to AC Converter

12v Solar DC to AC Converter

12v Solar DC to AC Converter is a device that can convert 12V Solar / Battery (DC) to AC so one can use this to to operate Computer, Fan , Bulb and other home appliance.

Suppose we have a 7ah battery and want to use in power cut than 12v Solar/DC to AC Converter  is going to fix your problem.

12v Solar/DC to AC Converter

DC to AC converters are used in a variety of applications, including:

  • Powering electronic devices in vehicles
  • Charging batteries, using computer and laptop
  • Providing backup power during outages
  • Running appliances in remote locations

In this tutorial I am going to list some DC to AC converter available on amazon

1 . Kit4Curious 12v Solar/DC to AC Converter 

  • 200 watts
  • Converts 12v DC to 220v AC
  • Overload protection, Low battery protection, Battery reverse connection protection
  • Use for Color TV, CFL, DTH, DVD and Mobile charger
  • Inbuilt output point of 2 USB for mobile charging output 5.5v DC

Buy at Amazon (Rs. 615.00)  : Click Here

2. ERH India Dc to Ac Dual USB Converter 

  • Can Convert DC 12V into AC 220V Output.
  • 200 Watt Powerful Output with 2 Sockets
  • Powerful Outputs with two AC Outputs
  • Can be used for multiple applications
  • High power output and Highly efficient

Buy at Amazon (Rs. 539.00)  : Click Here

3. Stoytec 12V DC Power Supply 400W 33A RAIN Proof

  • 12V DC , 400W, 33A OUTPUT
  • INPUT VARIES 187 V TO 262 V AC, 50HZ
  • “N” & “L” line on the sketch map means the neutral line and the live line.
  • ” E” is for Earth line, “+” is outgoing positive pole, “-” is outgoing negative pole.
  • The place on the wire connecting is the air outlet of the cooling fan. Please note the block is prohibited within 30cm infront of that place. Otherwise the product will not working properly for the heat dissipation is poor.

Buy at Amazon (Rs. 950.00)  : Click Here

Amaron quanta 12V 7Ah SMF UPS-Emergency Battery

  • AMARON Battery12AL007 – 12V 7AH terminal Sealed Lead Acid AGM Battery
  • Absorbent Glass Mat (AGM) technology
  • Warranty – 15 Month
  • Lead Acid
  • Solar Compatible

Buy at Amazon (Rs. 1379.00)  : Click Here

Note : If these kind of product available in your local market then please purchase it from there it will not only help existence of local vendor but also you will save money (around 10-20%).

MySQL Error Code #1118 Row size too large (> 8126)

MySQL Error Code #1118 Row size too large (> 8126)

Are you getting MySQL Error Code: #1118 Row size too large (> 8126). Changing some columns to TEXT or BLOB when uploading a Database or table  ?

The error message you encountered, “Error Code: #1118 Row size too large (> 8126),” indicates that the size of a row in your MySQL table exceeds the maximum limit allowed. In MySQL, the maximum row size limit is 8126 bytes.

This generally happens with innoDB engine when innodb_strict_mode is activated.

How to fix Error Code: #1118 Row size too large (> 8126) :

We have to deactivate innodb_strict_mode using sql command given below

SET GLOBAL innodb_strict_mode = 0;

Even its not working then open mysql’s my.ini and increase innDB log file size to 512MB.

innodb_log_file_size = 512M

Or you can watch our youtube tutorial

Sunetra Regular eye drops for computer users

Sunetra Regular eye drops for computer users

Are you working on computer for long hours and feel blurred vision, dry and tired eyes then you can Sreedhareeyam Ayurveda Sunetra Regular Herbal Eyedrops (17-60 years age).

I have already tried more than 3company’s products(just tears, itone, osmo tears …) for eyes,I had lot of burning sensation and pain in eyes, after using 8 drops in each eye it gave cooling effect immediately and all pain reduced.This is the best of all,there is no irritation/burning when used unlike others.

Sunetra is an Ayurvedic eyedrop that is used to protect and nourish the eyes. It is made with a blend of herbs that have been traditionally used to improve vision and eye health. Sunetra can help to reduce dryness, redness, and irritation, and it can also help to protect the eyes from dust, pollen, and other environmental pollutants.

For buying  Sunetra Regular Eye Drop  Click Here

Benefits of using Sunetra Regular eyedrop:

  • Reduces dryness, redness, and irritation
  • Protects the eyes from dust, pollen, and other environmental pollutants
  • Improves vision
  • Nourishes the eyes
  • Safe and effective for people of all ages
  • Suitable for use with contact lenses

Key Ingredients :

Sunetra is an ocean of herbal remedies that gives a strong layer of protection for your eyes. The ingredients that constitute Sunetra Regular are:

Jati (Royal Jasmine)
Royal Jasmine is having multitudes of medicinal benefits including the ability to relieve pain and alleviate redness. Its cooling ability and natural pain-relieving characteristics reduces pain related with minor scratches and inflammations. Its long term usage is believed to strengthen the eyes.

Padmakam (Sappan wood)
The anti-oxidant properties of padmakam makes it the best ingredient that would keep bacteria at bay and also provide many benefits through long term application. It prevents and also cures inflammation of the mucous membranes of the eyes. A pigment named brazilein present in Sappan wood has the ability to fight inflammation of the eyelids too.

Tulsi (Holy Basil Leaves)
Holy basil leaves is undoubtedly one of the best medicinal herb that carries anti-bacterial properties & addresses all physical, chemical & metabolic pain through its unique pharmacological actions. It has endless miraculous medicinal values & has excellent analgesic and germicidal properties.

Madhu (Honey)
Medicinal properties of honey is well-scripted in the world’s oldest medicinal literatures and since ancient times it has been used to cure & prevent infections. The mechanism of honey is related to its low pH level & high sugar content that is enough to hinder the growth of microbes.

Bhimseni Kapur (Borneol)
Borneol is a common ingredient in many Chinese herbal formulas. It is actually a compound derived from dryobalanopsaromitaca, a tree that belongs to the teak family. It helps relieve the local itching & discomfort and also relieves burning. It temporarily provides a coating for relief to protect the skin from inflammation and irritation.

Satapatri Jala (Rosewater)
Rosewater is prepared by distilling rose petals with steam. The vapor of rose water provides a cooling effect which helps in relieving stress. It comes with plenty of potential health benefits such as it helps soothe skin irritation. Its strong anti-inflammatory property aids in the treatment of ailments and prevents and treats ocular diseases.

Price of Sunetra Regular : RS. 75 for 10ml

Where to buy Sunetra Regular eye drop :

If you buy from local market it will cheaper but this product is not available in your market then you can buy from Amazon.



Compare free versions Google Meet, Microsoft Teams, Cisco Webex, and Zoho Meet

Compare free versions Google Meet, Microsoft Teams, Cisco Webex, and Zoho Meet

In this tutorial we are going to Compare world best free video conferencing application
Google Meet, Microsoft Teams, Cisco Webex, and Zoho Meet. Remember in this tutorial we are
going to compare free version features only.

Video conferencing tools come in demand in Covid period when teachers, corporate world …
using heavily to achieve their goal. Now without wasting time let compare …

Google MeetMicrosoft TeamZoomCisco WebExZoho Meet
Subscription PlanFreeFreeFreeFreeFree
Browser SupportFirefox, Edge, ChromeEdge, ChromeFirefox, Edge, ChromeFirefox, Edge, ChromeFirefox, Edge, Chrome
Meeting RecordingNoNoYesNoYes
Virtual BackgroundAvailableNAAvailableAvailableAvailable
Participant Capacity100100100100100
Meeting Time Limit60 Minutes60 Minutes40 Minutes40 Minutes60 Minutes

Conclusion : Which one is best depends on your usages while Google Meet seems simplest among all, while zoho offers comes with the most feature, Webex and Zoom only offer 40 minutes which is not suitable for online classes as in a group meeting 5 minutes generally wasted to join meeting by all candidate.

Special Note  : Right now many users of Microsoft Teams get “To start using Teams with current user email , sign out of your other account” error.

Garuda Linux “Raptor” 230305

Garuda Linux “Raptor” 230305

Garuda Linux is a popular Linux distribution based on Arch Linux released it latest edition called “Raptor” (230305). It is known for its user-friendly and aesthetically pleasing design, as well as its focus on providing a complete out-of-the-box experience for its users. Garuda Linux includes a number of pre-installed applications, including multimedia codecs, gaming tools, and other useful software.

Whats new in Garuda Linux “Raptor” 230305 :

  • Improves interface for the setup assistant and replaces Latte-Dock with standard Plasma panels
  • KDE dr460nized edition’s desktop experience far more stable
  • Features a much improved garuda-update, Dracut as the initramfs tool of choice as well as a clean Qt interface for our setup assistant.
  • Garuda Update 4.0
  • Dracut for initramfs tool of choice
  • Separate Garuda repository
  • UI and UX enhancements
  • Plasma 5.27.2
  • GNOME 43.0
  • Linux 6.2.2

Read Release Announcement at Garuda Forum

Download Garuda Linux “Raptor” 230305

Create a CSS based animated Floating Social Widget

Create a CSS based animated Floating Social Widget

In this tutorial we will learn how to create a animated floating Social widget, for reference please see the image below. It will enhance visitor experience of your / your client Website, you can add on your HTML based / WordPress based website also, you can our website also uses this floating widget.

In first step we need a add html code anywhere between <body> </body> tag, second we need to add css code anywhere between <body> </body> tag or in external css file


<div id="fixed-tabs">
      <a href="" class="fb">
          <span><i class="fab fa-facebook" aria-hidden="true"></i><em>Like Us</em></span>
          <span class="hideMobile"><strong>Like Us Facebook</strong> </span>
      <a href="" class="po"> 
          <span><i class="fab fa-youtube" aria-hidden="true"></i><em>Subscribe</em></span>
          <span class="hideMobile"><strong>Subscribe us YouTube</strong></span>
      <a href=";text=Hello" class="call" data-action="share/whatsapp/share">
          <span><i class="fab fa-whatsapp" aria-hidden="true"></i><em>Whatsapp</em></span>
          <span class="hideMobile"><strong>Contact us on Whatsapp</strong></span>
      <a href="" class="ra" data-toggle="modal" data-target="#exampleModal">
          <span><i class="fas fa-phone-alt" aria-hidden="true"></i><em>Request</em></span>
          <span class="hideMobile"><strong>Request a Call back</strong></span>



#fixed-tabs a {
  text-decoration: none;
  font-size: 15px;
  background-color: #90b1f4;
  color: #fff;
  position: relative;
  overflow: hidden;
  transition: width .3s; }

#fixed-tabs i {
  font-size: 20px;

#fixed-tabs i, #fixed-tabs i:before {
  display: block;
  margin: 0 auto !important; }

#fixed-tabs em {
  font-size: 10px;
  text-align: center;
  font-style: normal;
  margin-top: 8px;
  display: none;
  font-weight: 600; }

#fixed-tabs strong {
  font-weight: 300; }

#fixed-tabs .ra {
  background-color: #222324; }

#fixed-tabs .fb {
  background-color: #0154a4; }

#fixed-tabs .gp {
  background-color: #0154a4; }

#fixed-tabs .so i {
  background: url(assets/images/ico-rab.png) no-repeat center center;
  background-size: auto 100%; }

#fixed-tabs .so i:before {
  opacity: 0; }

#fixed-tabs .call {
  background-color: #0c9312; }

#fixed-tabs .call, #fixed-tabs .map {
  display: block; 

 #fixed-tabs a.po {
    background-color: #E32E19;

@media (min-width: 1001px) {
  #fixed-tabs a {
    background-color: #4542a9; }

  #fixed-tabs a.ra {
    background-color: #222324; }

  #fixed-tabs {
    background-color: #0154a4; }

  #fixed-tabs a.po {
    background-color: #E32E19;

  #fixed-tabs {
    position: absolute;
    top: 320px; }

  #fixed-tabs a {
    display: block;
    text-align: left;
    margin-left: auto;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.4); }

  #fixed-tabs a + a {
    margin-top: 8px; }

  #fixed-tabs a span {
    display: block; }

  #fixed-tabs a span:first-child {
    text-align: center;
    padding: 7px 0; }

  #fixed-tabs a, #fixed-tabs a span:first-child, .scrolled #fixed-tabs a, .scrolled #fixed-tabs a span:first-child {
    width: 30px; }

  .scrolled #fixed-tabs a span:last-child, #fixed-tabs a span:last-child {
    position: absolute;
    left: 40px;
    top: 50%;
    width: 220px;
    -webkit-transform: translate(0, -50%);
    transform: translate(0, -50%);
    -webkit-transition: width .3s;
    transition: width .3s; }

  .scrolled #fixed-tabs a:hover, #fixed-tabs a:hover {
    width: 200px; } }

#fixed-tabs {
    position: fixed;
    right: 0;
    text-align: center;
    line-height: 1;
    font-size: 0;
    z-index: 22500;
@media (min-width: 1280px) {
  #fixed-tabs {
    position: fixed;
    top: 350px;
    z-index: 22500; 

  #fixed-tabs a, #fixed-tabs a span:first-child {
    width: 75px; }

  #fixed-tabs a span:last-child {
    left: 80px; }

  #fixed-tabs a:hover {
    width: 250px; }

  #fixed-tabs i {
    font-size: 20px; 

  #fixed-tabs em {
    display: block; }

  .scrolled #fixed-tabs a, .scrolled #fixed-tabs a span:first-child {
    width: 30px; }

  .scrolled #fixed-tabs em {
    display: none; }

  .scrolled #fixed-tabs i {
    font-size: 16px; }

  #fixed-tabs .fb:hover {
    background-color: #0154a4 !important; }

  #fixed-tabs .so:hover {
    background-color: #84bd00 !important; }

  #fixed-tabs .gp:hover {
    background-color: #0154a4 !important; } }
@media (max-width: 1000px) {
  #fixed-tabs {
    bottom: 0;
    width: 100%;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex; }

  #fixed-tabs a {
    padding: 12px 0;
    -webkit-box-flex: 1;
    -webkit-flex: 1;
    -ms-flex: 1;
    flex: 1; }

  #fixed-tabs a span {
    display: inline-block;
    vertical-align: middle; }

  #fixed-tabs a span:last-child {
    margin-left: 7px; }

  #fixed-tabs a strong {
    display: none; }

  #fixed-tabs a strong.hider {
    display: inline; }

  #fixed-tabs {
    background-color: #0a0908; }

Canon Pixma GM2070 best Single function auto duplex printer

Canon Pixma GM2070 best Single function auto duplex printer

Canon Pixma GM2070 is the best single function monochrome auto duplex ink tank printer in market by canon with decent speed 13ipm. This printer also has the option for colour document printing by purchasing colour cartridge.

Why to choose Canon Pixma GM2070 over other Printers :

  • 15,000 per month high yield
  • Replaceable Ink Head
  • Auto Duplex
  • Hi-speed USB 2.0, Wireless, Wired LAN, Wireless/Wired LAN Pictbridge, Direct Wireless
  • Low cost printing
  • Optional colour print (not recommended as cost per print very high around 15Rs/page)

Canon Pixma GM2070 Specification :

  • Paper Tray : Rear and Cassette (both can carry 350pages)
  • Print interface : USB and WiFi
  • Voice Assistant Compatibility : Google Assistant and Alexa
  • OS Support : Windows, Linux and MaC OS
  • Page Speed : 13ipm Simplex and 4.8ipm for auto duplex
  • Width : 40.3 cm, Height :16.6 cm, Depth :36.9 cm
  • Large Ink Bottles You won’t have to be concerned about running out of ink because this printer offers continuous printing with an ink bottle that has up to 8300 pages yield(economic mode), 6300pages (standard).

Power Consumption
OFF : Approx. 0.3 W

Standby (all ports connected, scanning lamp is off)
Approx. 1.6W

USB connection to PC
Approx. 13W.

Time to enter Standby mode
Approx. 1min 29sec.

Cons :

Colour print is optional by purchasing Compatible Colour Cartridge : CL-741 (1900Rs. 150Page output), CL-741XL(Rs.2700, 400pape out), so you have to sell out your kidney and liver to take color print.


MRP : ₹15,785 , Selling Price : ₹11,499, but I purchased this printer at Rs. 7999(in a offer from Flipkart).


Contact form 7 set default date and 7 days restriction

Contact form 7 set default date and 7 days restriction

In this tutorial we will learn how to set contact form 7’s date field restriction to today+7 days plus restrict to pick backward dates and set current value to Today’s date.

As we know contact form Date Field syntax is like given below

<label>Preferred date*
[date* preffered_date]

Now set minimum date

[date* preffered_date min:today ]

Now set date salection to upcoming 7days

[date* preffered_date min:today max:today+7days ]

Now going to add id and set the value using javascript

[date* preffered_date min:today max:today+7days id:datePicker]


    [text* full_name] </label>

    [text* grade] </label>

    [text* subject] </label>

<label>Preferred date*
    [date* preffered_date min:today max:today+7days id:datePicker]

    [text* timezone_location] </label>

    [email* your-email autocomplete:email] </label>

<label>Phone (WhatsApp/Telegram)
[number phone]</label>
    [textarea* message minlength:10 maxlength:600 ] </label>

<label>Attach file (Max. Size 10MB, allowed doc,docx,pdf,xlsx)
[file attachments limit:10mb filetypes:doc|docx|pdf|xlsx|PDF]

[submit "Submit"]

jQuery(function ($) {
   var now = new Date(); 
   var day = ("0" + now.getDate()).slice(-2);
   var month = ("0" + (now.getMonth() + 1)).slice(-2);
   var today = now.getFullYear()+"-"+(month)+"-"+(day);
$("#datePicker").attr("min", today);

JavaScript adding two integer Computer Lab Btech CSE

JavaScript adding two integer Computer Lab Btech CSE

In this tutorial we will learn how to create a HTML file(add.html) and add two integer using input element (num1 and num2) and submit button. For calculation we will use pure JavaCript.

Create a file name add.html and copy the code given below, save and run in any browser.

This java script programme is extensively used in Jharkhand and West Bengal Btech CSE Lab.

<!DOCTYPE html>
<html lang="en">
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">

<table border="1">
<td><label>Enter No. 1</label>
<input type="text" id="num1" value="0">
<label>Enter No. 2</label>
<input type="text" id="num2" value="0">
<td style="text-align:center">
<button onclick="calculate()">Calculate</button>
<td style="text-align:center">
<div id="result"></div>

function calculate(){
var num1=parseInt(document.getElementById("num1").value);
var num2=parseInt(document.getElementById("num2").value);
var sum;
sum = num1+num2;


Run this Programme :

Create acf_form save data and Send mail from Frontend

Create acf_form save data and Send mail from Frontend

This post will cover how to create a form on the front end of your website using Advanced Custom Field acf_form() function. We can store data as well as send email also.

To load necessary CSS, JavaScript and other stuff we need to call acf_form_head() first then using acf_form() we can display and save data and using action add_action(‘acf/save_post’, ‘my_save_post’); can send email also. code is given below and added comment to so you learn easily.

Paste below this code in your template .

<?php acf_form_head(); ?>
<div id="primary" class="content-area">
    <div id="content" class="site-content" role="main">
   <?php while ( have_posts() ) : the_post(); ?>
    $title="Order ".$today;

        'post_id'       => 'new_post',
        //'post_title' => $title,
        'field_groups' => false,
        'fields'      => $fields,
        'new_post'      => array(
            'post_type'     => 'quick_order',
            'post_status'   => 'publish'
        'submit_value'  => 'Submit',
        'updated_message' => 'Thanks! We have received your request.',
        'return' => 'order-success',
    )); ?>
    <?php endwhile; ?>

Now send email using code below (paste below code in functions.php.

add_action('acf/save_post', 'my_save_post');
function my_save_post( $post_id ) {
    $post = get_post( $post_id );
    $name = get_field('customer_name', $post_id);
    $mobile = get_field('mobile_no', $post_id);
    $emailf = get_field('email', $post_id);
    $address = get_field('address', $post_id);
    $pickD = get_field('pickup_date', $post_id);
    $pickT = get_field('pick_up_time_slot', $post_id);
    $delivT = get_field('delivery_type', $post_id);
    $to = '[email protected]';
    $email='[email protected]';
    $headers = 'From: ' . $name . ' <' . $email . '>' . "\r\n";
    $subject = "Quick Order";
    $body = '';
    $body .="Customer Name : ".$name."<br/>";
    $body .="Mobile No. : ".$mobile."<br/>";
    $body .="Email ID : ".$emailf."<br/>";
    $body .="Address : ".$address."<br/>";
    $body .="Pickup Date : ".$pickD."<br/>";
    $body .="Pickup Time : ".$pickT."<br/">;
    $body .="Delivery Type : ".$delivT."<br/";
    wp_mail($to, $subject, $body, $headers );