Abstract: –

In Vigyan Ashram we have 2 cows & 12 goats. They require 100 kg of feed daily.
So we require a shredder cut the dry matter to make feed for them.
This machine requires a continuous power supply, if it runs with AC it will charge more.
So, after discussing with Yogesh Kulkarni sir, Suhas sir, & Aditi it is decided to design a DC automatic shredder. DC appliance is more energy-efficient than AC appliance. Also, speed control is more effective with DC than AC. Also, in Ashram we have developed technology of composter for making composed material out of kitchen waste.
It requires a culture for making compost material. Now, we are also thinking to make culture by directly spraying human urine on dry matter.
So, for cutting that matter we require a shredder.

Vigyan Ashram is in Pabal which is a village situated around 60km away from the city. There are many problems here, especially problem-related to energy cut-off. So, if we run the shredder on DC we need not depend upon grid power supply.

Observation :-

1) For preparing feed for cattle we require to cut the grass.

2) Vigyan Ashram is situated in a rural area where we face power cut off issue.

3) Shredding /cutting of grass requires around 10 units of energy per day which charges Rs. 100 per day as per MSEB (Maharashtra State Electrical Board).

4) So, if we switch our shredder on to the solar energy which is available for 6 hours in a day, then these charges are getting saved.

Problem Identification :-

Brown matter or grass needs to be cut for preparing feed for cattle. Also it will be beneficial for making Silage (Murghas) (link)
And it require continuous power supply while shredding but due to power cut-off issue system is get stop. In Vigyan Ashram we conduct various research related works, composter is one of them. Composter is a machine in which we prepare compost. Compost is decomposed organic material, such as leaves, grass clippings, and kitchen waste. It provides many essential nutrients for plant growth and therefore is often used as fertilizer. Compost also improves soil structure so that soil can easily hold the correct amount of moisture, nutrients and air. To prepare compost we need to cut these organic materials this shredder will play an important role.


To design and fabricate a Shredder which will operates on DC and will cut 100 Kg of brown matter .This machine will be use to shred the material for preparing cattle feed as well as it will be use to prepare raw material for composter.
Further it will also be use to cut organic material, such as leaves, grass clippings, and kitchen waste to prepare compost.


1) To decide the capacity of shredder.

2) Selection of components :- DC motors with required capacity of power, Solar panels, Charge controller, Relay and to design the electronic circuits.

<p align="left">3)     Mechanical system design, development and fabrication :-</p> 
<p align="left">a)    Designing of system involves: - Rough sketch and CAD designing.</p> 
<p align="left">b)     Changes in the design if required</p>

c) Selection of blades to push the grass forward and to cut the grass, component placement and assembly with proper mountings.

Needs of project :-

1) By using DC power supply for “Shredder”, the continuous power supply will be available for a minimum of 6 hr in a day. So no need to depend upon the grid supply.

2) It can be used for making feed for animals.

3) It can be used also for making raw material for
culture media for the composter.

Available solutions in the market:-

A shredder is a machine that reduces the size of, and tears up, many different kinds of materials. From paper shredders to scrap metal shredders, they are used in many different industries and have much different design.
Based on the purpose of use, shredders can be categorized as consumer shredders and industrial shredders.

1) Consumer Shredders: – Paper shredder normally falls into the category of consumer shredder as it is mostly used by consumers.

2) Industrial Shredders: – Paper shredder normally falls into the category of consumer shredder as it is mostly used by consumers.

Overall study of renewable energy:-

Human activity is overloading our atmosphere with carbon dioxide and other global warming emissions. These gases act like a blanket, trapping heat. The result is a web of significant and harmful impacts, from stronger,
More frequent storms, to drought, sea-level rise, and extinction.
Carbon dioxide (CO2) is the most prevalent greenhouse gas.

1) Burning natural gas for electricity releases between 0.6 and 2 pounds of carbon dioxide equivalent per kilowatt-hour.

2) Coal emits between 1.4 and 3.6 pounds of CO2E/kWh.

Whereas renewable energies like ;

1) Wind is responsible for only 0.02 to 0.04 pounds of CO2E/kWh on a life cycle basis.

2) Solar and geothermal energies produce 0.1 to 0.2 pounds respectively and hydroelectric is between 0.1 and 0.5 pounds.