This document is a presentation by Aadish Chopra, an intern at REIL (Rajasthan Electronics Industries Limited). It summarizes REIL, which was established in 1981 as a joint venture between the Government of India and Rajasthan to develop rural electronics. It discusses REIL's departments, including electronic milk tester production and solar PV production. It also describes Chopra's project on LED dimming using pulse width modulation with an LM3405 LED driver and IC 555 or PIC16F876A microcontroller.

1. Welcome
to
Presentation
Aadish Chopra
11/101
IV B.Tech
Electronics and Communication
Trainee at REIL
Created By Aadish Chopra

2. About REIL
• Established in 1981.
• A Joint Venture between Government of India and Government of Rajasthan.
• Shareholding pattern :
1. Government of India – 51% holding.
2. Government of Rajasthan – 49% holding.
• Formation of REIL came into existence at the initiative of NDDB, DoE, DHI & RIICO.
• Accorded the Status of “MINI RATNA” by the Government of India in 1997
• ISO 9001 & ISO 14001:2004 organization.
• A Schedule ‘C’ Organization
• An Energy Efficiency Four Star Rating Awarded Organization
Created By Aadish Chopra

3. Vision
Strive To Be Leader In The Area Of Rural Electronics, Non Conventional
Energy Systems And Information Technology By Developing, Manufacturing
And Marketing Quality Products In These And Other Emerging Areas By
Offering Quality Services.
Mission
Commitment To Total Customer Satisfaction By Identifying Their Specific
Needs, Translating Them Into Quality Products, Providing Dependable
After Sales Service And To Work For Continual Improvement Of Quality
Management System By Developing/Marketing Quality Products.
Created By Aadish Chopra

4. PERFORMANCE HIGHLIGHTS
MoU Rating
S.No Financial Year MoU Rating
1 2004-2005 “Excellent”
2 2005-2006 “Excellent”
3 2006-2007 “Excellent”
4 2007-2008 “Excellent”
5 2008-2009 “Good *”
6 2009-2010 “Very Good *”
7 2010-2011 “Excellent”
8 2011-2012 “Excellent”
9 2012-2013 “Excellent**”
Created By Aadish Chopra
* Pay Revision Liability, ** Provisional

5. Various Departments Of REIL
• Training at REIL was subdivided into 6 departments.
1. Electronic Milk Tester Production
2. Solar Photo Voltaic Production
3. Electronics Division
4. Renewable Energy Division
5. Business And Development Division
6. Quality And Assessment
Created By Aadish Chopra

6. EMT Production
Application - Village Milk Cooperative Societies
for % Fat content in Milk
Application - Low Cost version of Milk Collection Station
for small village cooperatives
Created By Aadish Chopra

7. Application - Village Milk Cooperative Societies for
fair & prompt payment to farmers
Application - Total Milk quality parameters
analysis for Dairies
Created By Aadish Chopra

8. Application - Computerized version of Milk Collection Station with
accounting facility and customer identification cum payment system through
Electronic Pass Book
Created By Aadish Chopra

9. Principle of EMT
•Electronic Milk Tester works on the
photometric measurement of light
scattered by the fat globules present in
the milk sample. The measuring
procedure follows the conventional
system of dilution, mixing,
homogenization and photometric
measurement.
Created By Aadish Chopra

10. SPV
PRODUCTION
Created By Aadish Chopra

11. SPV FOR BHARAT NIRMAN RAJIV GANDHI SEVA KENDRAS (BNRGSKs) in Rajasthan
REIL executed massive project of Roof top SPV power back up solution at 9100 GRAM PANCHAYAT & 248 PANCHAYAT
SAMITI used for computerization of local services & records.
PCU Battery
Bank
Component of SPV Power Plant for Gram
Panchayat/ Panchayat Samiti
Performance Monitoring by website
Similar SPV Power back up solutions Created are available By Aadish Chopra
for Village Milk Collection Centers
(AMCU)/ BMC Center/MCCs Value Chain System

12. Working
Principle
Based on Photovoltaic effect
Created By Aadish Chopra

13. Conversion of Solar
energy into
Electricity
The Solar Panel trap the energy from the sun during daytime whose output is fed to
a charge controller which is then fed to the battery . DC circuits are directly fed but
AC is produced with the help of an inverter which is then forwarded to an AC load .
Created By Aadish Chopra

14. Created By Aadish Chopra

15. EQUIPMENTS AND
MACHINES
Created By Aadish Chopra

16. PROJECT
At
REIL
On LED Driver And Dimming
Using PWM
Project Submitted to :
Research and Development Department ( R & D)
REIL
Created By Aadish Chopra

17. OBJECTIVE
The objective of our project is to drive LEDs
of small power rating (3W/5W) with the
help of LM 3405 ( LM3405A 1.6MHz, 1A
constant current Buck Regulator LED driver)
and provide dimming control with the help
of pulse width modulation using IC 555 as
astable monovibrator circuit providing
varying duty cycle or by using PIC16F876A
which is a 28- pin programmable
microcontroller having a dedicated pin for
PWM .
Created By Aadish Chopra

18. Block Diagram of LED Dimming
Created By Aadish Chopra
IC 555
LED
DRIVER
LM3405A
LED
PANEL
generate
PWM
signal
PIC16F876A LED DRIVER
LM3405A
LED PANEL
generate
PWM signal

19. CIRCUIT DIAGRAM
Output from IC 555 and PIC is fed to EN/DIM pin (4th pin )
Created By Aadish Chopra
V in min = 8 Volt
V in max = 15 Volt

20. Created By Aadish Chopra

21. Conclusion
•Made me learn the
practical aspects of
engineering.
•Gave me experience of
working in a professional
environment.
•Learnt adjusting myself
to the hectic schedule
and workload.
Created By Aadish Chopra

22. THANK YOU
Created By Aadish Chopra