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April 30, 2025 , ,

How To Fix Power Supply Load Issue Using One Part

In this project we learn how to fix power supply load issue using one part. With this method, you can easily fix the issue of power drop. Sometimes the power supply doesn’t work properly. it keeps turning on and off. 
How To Fix Power Supply Load Issue Using One Part

This usually happens when we connect something heavy like a motor that needs more current than the power supply can give. Because of that, the device doesn’t run smoothly and keeps restarting. 

To fix this, we did a little trick. We added a 22k resistor to the input side of the optocoupler inside the power supply. This makes the power supply think the load is not too heavy, so it sends more current to the output. 
Increase Current Output Easily


Basically, we messed with the feedback system a bit. By changing the resistor to 22k, the power supply gives more amps, which helps run heavy loads properly without tripping. It’s like a small hack to increase the output limit.

video for fixing power supply load issue



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April 27, 2025

LM317 Voltage Calculator

Find your output voltage easily by entering resistor values.







LM317 Voltage Calculator Online Free Tool 

Using LM317 Voltage Calculator Online Free Tool you can easily calculate output voltage by entering R1 and R2 values. Perfect for designing reliable power supplies and regulator circuits.


How to use Lm317 Calculator Tool:

  • Add the value of R1 resistor (in ohms).
  • Add the value of R2 resistor (in ohms).
  • Press the "Calculate" button.
  • The tool will instantly show your Vout.
  • Use the result to design or troubleshoot LM317-based circuits.
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April 25, 2025

555 Timer Calculator – Astable Mode

This tool calculates the frequency and duty cycle of a 555 timer in astable mode. Enter your values below.









555 Timer Calculator Online Free Tool

Use 555 Timer Calculator Online Free Tool to find frequency and duty cycle for your astable circuits. Just enter resistor and capacitor values to get instant, accurate results. 

How to Use the 555 Timer Calculator (Astable Mode): 

  •  Select the correct units for your resistors (R1, R2) and capacitor (C) — like Ω, kΩ, µF etc. 
  •  Enter the numeric values in the input boxes for R1, R2, and C. 
  •  Click on the “🔍 Calculate” button. 
  •  The tool will instantly show you the frequency (Hz) and duty cycle (%) of your astable 555 timer circuit.
  •  Use the theme toggle to switch between dark mode and light mode as per your preference.
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April 23, 2025

🔋 Battery Life Calculator


Battery Life Calculator Online Free Tool

Calculate battery life instantly using capacity and current draw. Perfect for electronics projects, DIY makers, and embedded system designers. 
Battery Life Calculator Online Free Tool

How to use Battery Life Calculator Online Free Tool

Enter your battery's capacity in milliamp-hours (mAh) and the current draw of your device in milliamps (mA). Click “Calculate” to instantly see the estimated battery life in hours and days.
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April 21, 2025

LED Resistor Calculator Online Free Tools

Quickly calculate the ideal resistor for your LEDs using this LED Resistor Calculator Online Free Tools. Enter supply voltage, LED voltage, and current to get instant results
LED Resistor Calculator Online Free Tools

 How to Use the LED Resistor Calculator:

  •  Enter Supply Voltage (V): This is the voltage coming from your power source, like a battery or adapter (e.g., 9V). 
  •  Enter LED Forward Voltage (V): This is the typical voltage drop across the LED. Common values:
  1.  Red LED: ~2V
  2.  Blue/White LED: ~3.2V 
  •  Enter LED Current (mA): The desired current for the LED (e.g., 20 mA is standard for most small LEDs). 
  •  Click “Calculate”: The tool will instantly show you the recommended resistor value in ohms (Ω) to safely connect your LED

LED Resistor Calculator

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April 21, 2025

Ohm's Law Calculator Online Free Tools

Quickly calculate Voltage (V), Current (I), or Resistance (R) using our easy Ohm's Law Calculator Online Free Tools. Perfect for electronics students,
Ohm's Law Calculator Online Free Tools

hobbyists, and engineers.
what is ohm law formula? ohm law formula is V = I × R
V represents Voltage, I represents Current, and R represents Resistance in Ohm’s Law (V = I × R).

How to Use This Ohm’s Law Calculator:

Select what you want to calculate from the dropdown (Voltage, Current, or Resistance).
For example, if you select Voltage (V), then:
  • Enter the Current (I) value in the first box
  • Enter the Resistance (R) value in the second box
  • Click Calculate, and your Voltage result will appear instantly!
 

Ohm's Law Calculator

Ohm's Law Formula: V = I × R
Where: V = Voltage (Volts), I = Current (Amps), R = Resistance (Ohms)
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February 26, 2024

 how to make beautiful wall clock using household item

In this project we learn how to make beautiful wall clock using household item. its very easy simple and money saving project. for making this project we need some components. 

Components:

how to make beautiful wall clock using household item
  • Wall clock machine.
  • Wall clock cell
  • Card board.(i use old cake base)
  • Print of numbers.
now following few steps and make same.
  • 1st color print of numbers on sticker paper.
  • Now adjust this paper on cardboard of cake base. 
  • And now attach clock machine on this cardboard. 
  • Now attach time needle.
  • And finally connect cell with clock machine.
we learn it more batter with watching video.

Video of homemade beautiful wall clock


Total cost of wall clock project:

Total cost of this project roundabout 1$
  • wallclock machine price is 0.8$ in local market.
  • print paper cost rountabut 0.1$ in local market
  • cell cost roundabout 0.1$
  • and cardboard is free.
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February 21, 2024 ,

 How to make 220v universal led tester

In this project we learn how to make 220v universal led tester easy at home. its very easy and simple project. you can test all type of leds. for making this project we need some components.

Components:

How to make 220v universal led tester
  1. Bridge rectifier
  2. 3 volt LED
  3. 68k resistor
  4. 24v zener diode
  5. 100k, 1 watt resistor
  6.  Shoe switch
  7.  Old tester wire
Now follwing few steps and make same.
  • Connect 1 side of 68k resistor with 3v LED 
  • 2nd side of 68k resistoe and LED use for 220v input.
  • Now 100k 1w resistor connect with 2nd side of 68k resistor.
  • And now connect bridge rectifire. (you can make bridge rectifier using 4 diodes of 1N4007.
  • Finaly connect 24v zener diode. 
we learn it more batter with watching video

Video of homemade 220v universal led tester


Total Cost of 220v universal led tester:

the total cost of this project round about 0.3$
  • shou switch cost roundabout 0.2$ 
  • zener diode cost roundabout 0.01$
  • bridge rectifire cost roundabout 0.04$
  • led cost roundabout 0.01$
  • 68k resistor cost roundabout 0.01$
  • 100k 1w resistor cost roundabout 0.03$


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February 14, 2024 ,

 How to rewind armature of drill machine

In this project we learn how to rewind armatore of drill machine. its very easy and simple process. 
1st we need some basic information about armature of drill machine.
Its duplex winding. 
How to rewind armature of drill machine

Pole is 2 north and south.
Segment is 24 
And slot is 12. 
We know pitch is equal to slot over pole.
12/2 =  Answer is 6
Mean we wind in 1 and 6 slot reshow 
For more simplify we make a simple chart of slot and segment combination.
Slot Segment
1-6 1,2
2-7 3,4
3-8 5,6
4-9 7,8
5-10 9,10
6-11 11,12
7-12 13,14
8-1 14,16
9-2 17,18
10-3 19,20
11-4 21,22
12-5 23,24



Now we wind very easily with the help of this chart. simple put a number on armature slot and segment. and start winding with the help of this chart.

Video of rewind armature of drill machine.


What is duplex winding?

if segment is 24 and slot is 12 so its duplex winding.
if segment and slot both are equal then its called simplex winding.
if segment is 36 and slot is 12 then its called triplex winding.
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