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Solderable DIY project kit for Engineering & Diploma students

Product of choice for Engineering & Diploma students worldwide.

Do-It-Yourself Kit

Rs. 4,499

Rs. 3,600

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. 0

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. 0

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 aim of this project is to develop an under voltage and overvoltage cutoff  mechanism to protect the load from damage. It cuts off the load when the input voltage is above or below a set value.

This proposed system trips the load in the event of the input voltage falling below or above a set value. Two 555 timers are used  forming a window comparator. This delivers an error output if the input voltage to them crosses the range beyond the voltage window.

A relay is then operated the contacts of which are used to cutoff the load for safety reasons. A lamp is used as a load in this project.

The concept in future can be extended by integrating an alarm, which sounds when voltage fluctuation occurs. It can also be interfaced with a GSM modem to convey alert  message to the user via SMS to take appropriate action.

Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Call/mail for Tech Support from 10 am - 7 pm.
Can be Customized for Arduino, Raspberry Pi, PIC
Non-Microcontroller Project.
Load Cut off Switch Upon Over Voltage or Under Voltage
Hardware Requirements
  • 555 Timers
  • LED
  • Voltage Regulator
  • Resistors
  • Potentiometer
  • Capacitors
  • Diodes
  • Relay
  • Lamp
  • Transformer
Software Requirements
Q & A
Q:  Can I replace lamp with any load?
A:  Yes, any electrical load up to 200W can be used.
Q:  What is over and under voltage protection?
A:  Tripping the load under low voltage and high voltage conditions is over and under voltage protection.
Q:  Is there any alarm indication provided for abnormal conditions?
A:  Yes, a buzzer continuously beeps for these conditions
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 4 reviews
AMIT PARASHAR, Mumbai on 7th June, 2016, 05:24 PM

Power system protection devices 2nd and 3rd edgefx kits.com
DIY kit is nice
Received on 3rd day
Everything is nice
Yeah, okay I’ll refer my friends

Vijay Kumar M G, Bangalore on 4th June, 2016, 04:55 PM

I got to know about edgefx through google. I was searching my project title in google then i got the edgefx site..
I have decided to buy project from edgefx because in website i saw 100% output guaranteed that is why i purchased a project from edgefx. And, i like most about edgefx was the presentation of the kit.
the kit was delivered in time with right components.
i would like to give reference to my juniors.

ronak goyal, kota, Rajasthan on 16th December, 2015, 05:31 PM

I searched for the words like Load Cut off Switch Upon Over Voltage or Under Voltage in Edgefx Kits web site
I found my project Title so decided to buy that project from Edgefx. I like the project report provided along with the kit.

hasan nabeel, noida on 23rd November, 2015, 06:26 PM

Suggested from my seniors who already took project from edgefx.
I like the soft copy explanation which has been taken from my friend,that’s why i was ready to take the project from here.
got it through online purchase.

Rating Breakdown (4 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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