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Model: 167    

Solderable DIY project kit for Engineering & Diploma students

Product of choice for Engineering & Diploma students worldwide.

Do-It-Yourself Kit

Rs. 3,119

Rs. 2,496

Includes complete hardware with plain PCB and a pre-programmed controller for building the project. Extensive documentation for project execution including step-by-step instructions for Circuit building, Assembly procedure and Troubleshooting. Thorough understanding from the Problem definition to Circuit Design to Programming, Testing, Troubleshooting and finally building a working hardware project.

Tool Kit


Rs. 350

Includes Digital Multimeter, Soldering Iron, Screw driver, Cutter, to be used with Do-It-Yourself Kit to build the project.

Loaded and Tested PCB


Rs. 1,279

Rs. 1,024

Pre-soldered and tested PCB. Choose this option only if you are short on time. Only works along with the Do-It-Yourself Kit. (Can be purchased later)

Total Rs. 0

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The project is designed to provide protection to induction motor, by applying voltage gradually from low to high for smooth start. Induction motor during the initial starting condition takes up much larger current than its capacity.

This leads to motor instantly catching the speed resulting in high mechanical stress and also causing some damage to the motor windings. Sometimes the windings may also get burnt. Smooth start to the induction motor is based on the SCR firing angle control principle.

This project consists of a two anti-parallel SCR’s connected in series with an induction motor to the supply. At the time of start the firing angle is heavily delayed by received delayed pulses from an operational amplifier. The op-amp operates in comparator mode which compares zero voltage pulses to develop a saw-tooth voltage.

This waveform is further compared against a varying voltage by charging and discharging of the capacitor to develop delayed pulses for triggering the SCRs. A lamp is provided in this project in place of an induction motor for demonstration purpose.

Further the project can be enhanced by using six SCRs, two connected in back to back for each phase.

Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Analog Soft Start Induction Motor.
Call/mail for Tech Support from 10 am - 7 pm.
Can be Customized for Arduino, Raspberry Pi, PIC
Non-Microcontroller Project.
Smooth Start of a Single Phase Induction Motor
Hardware Requirements
  • Op-amp
  • Opto-isolators
  • SCRs
  • Voltage Regulator
  • Transformer
  • Diodes
  • LED
  • Resistors
  • Capacitors
  • Lamp
Software Requirements
Q & A
Q:  What is soft start?
A:  Soft Start means gradually increasing the supply voltage to the motor
Q:  Why bulb is used instead of motor?
A:  In order to visualize the soft start it is better to use a bulb
Q:  Does this project have a pre-programmed microcontroller?
A:  No, it is a non-microcontroller based project
Q:  What is the formula for calculating smoothing capacitor value?
A:  There is some approximated formula .Peak to peak ripple voltage = Load current in amps / (2*line frequency in hertz *capacitance in farads). But as rule of thumb for 1 A current 1000uF is best. Thus it is load dependent.
Average Rating
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Showing 4 of 11 reviews Show All
Rockins Peter Macwan, Vadodara on 29th May, 2017, 03:56 PM

I got to know about edgefx through internet. I was searching my project in google then i got to know about edgefx. The keywords i used to find edgefx was underground cable fault.
I have decided to buy project from edgefx was i found my project in edgefx with same similarities. So, that is why i have purchased project from edgefx. I like kit presentation.
The support team has helped me in purchasing the project & the kit was delivered in time with right components..

And,i want to give reference to my juniors and friends.

Parimal Sahukar, DURG on 18th November, 2015, 11:16 AM

I come to know about Edgefx through Internet
I found the information related to my project requirement on your website
I Purchased directly through online.

Parimal Sahukar, DURG on 2nd June, 2015, 03:44 PM

I came to know about Edgefx through my friend named Mr. Thanmay patak. I directly used Edgefx in Google.I decided because I am getting the project for cheap and reliable. I like the circuit given by Edgefx because it is very easy to understand. No my kit delayed for a day.I directly purchased the project through online. The component description should be clearer.

Shilpa, Palakkad on 2nd June, 2015, 01:37 PM

Her Friend Mr. Sri Hari placed an order instead of her.I decided to buy from Edgefx because my friend forced me to take the kit.Yes the kit delivered on time with the right components. I purchased the project through online.No Suggestions.

Rating Breakdown (11 Reviews)

Tool kit cannot be purchased individually.


Edgefx Technologies Pvt. Ltd.,
Plot No. 105, 3rd Floor,
Liberty Plaza, Himayathnagar,
Hyderabad - 500029,
Telangana, India
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