R&D CONTRIBUTIONS (1962 - 2012)
List shows some important products I delivered to the country.
Almost all mentioned below are first time Indian design successes and serving the customers well.
My Teammates : L. S. Sannabhadti (45 yrs), R. N. Doss (35 yrs), B. N. Pal (18 yrs), U. V. Save (20 yrs),
Sanjay Bole (20 yrs), M. Dandekar (40 yrs), D. Choudhury (6 yrs) and many others
1.
1962 to 1972 ++
Year
Product
Some Users
1962
 Five Solid State 'on-belt' Digital Batch Counters and Automatic Sorters for Bottle Caps. 'India Crown Cap' Division of L&T.
1962
 Optical Water Turbidity Meters for Suspended Turbidity. Over 400 Water Treatment Plants in India.
1962
 Four Station Laboratory Water Floculator.
1963
 0-30VDC/2A Regulated Power Supplies using Dry Battery Ref. IITs, NPL, PRL, BEL, ITI, DEDL etc.
1963
 Dual 0-300VDC/ 200mA & 0 to -150V Bias Laboratory Supply and Other Vacuum Tube PSU Series. Became a Standard Lab Supply in all Engineering Colleges and Labs in the Country.
1963
 Servo-motor Controller Line Power Stabilizers 3 to 20kVA. Automatic Electric, Tata electric etc.
1963
 0 to 70kV DC Test Set with 90kV 0.2µF Capacitor. Tata Electric, BHU, DESU etc.
1964
 0 to 30VDC 10A Regulated Supply using Tracked AC Line. IIT, TIFR, NPL and Several Others.
1964
 Cardiac AC Defibrillator. Cardiac Surgeons PK Sen, Datoor, SK Sen, Gopinath Vellore, Grant etc.
1964
 Skin Thermometer with Bead Thermistor for Peripheral Nerve Study. Several Dermatologists beginning Dr. BB Gokhale.
1965
 Bedside Cardiac Solid State Pacemakers. Cardiac Surgeons PK Sen, Datoor, SK Sen, Gopinath Vellore, Grant etc.
1965
 Development of DC Pulse Stepper Motors (with MG Bhat of Automatic Electric). Thousands used in Line Voltage Servo-stabilizers in APLAB & AE.
1965
 Variable Freq Low Distortion Audio Generator using Thermistor Bolometer. BEL, ITI, National Labs, Engineering Colleges, DEDL etc.
1966
 Vehicle Mounted Voltage Regulator meeting high environmental endurance military specs K114E. Indian Army through BEL.
1966
 500W Solid State 24V DC to 230V ac Inverter Meeting Environmental Military specs K114E (now DEF55555).
1966
 Solid state Ringer and Multi Tone Generators for Strowger Telephone Exchanges. Indian Telephone Industries; installed in 100s of Telephone Exch.
1967
 SCR Pre-regulated High Power Variable DC Power Sources. Industries, BEL, ITI, Universities, IITs.
1968
 Impressed Current Cathodic Protection Systems for Frigates made by Indian Navy. All Indian Naval Frigates are Fitted with These Corrosion Protection Systems.
1968
 Solid State Sine, Sq, Triangular, Saw tooth Function Generator with diode wave shaper. T & M Customers All Over India.
1968
 Digital Frequency Counters with Nixie Tube Displays. T & M Customers All Over India.
1969
 500W & 1000W Sine wave Linear Inverter with Class B Transistor Amplifiers. BEL, Industrial and Defense Services.
1970
 20kVA UPS System using Three SCR digital Bridges using New TRC Developed Topology. Satellite Earth Stations of DoT.
1970
 Publication of "Materials in Electronics " - A comprehensive info on materials such as plastics, metals, alloys and chemicals and their processing technologies used in electronic production. Sold to Universities, National Labs and Government Electronic Establishments.
1971
 Started the First Electronics Monthly, "Electro-Technics" Devoted to Technology Development and Growth of Indian Electronic Industry. Produced and Sustained for Three Years; closed in 1974.
2.
1972 to 1982 ++
Year
Product
Some Users
1972
 Digital Computers Using 14 Vacuum Tube Amplifiers as Op-amps and Configuration Patch Board. NCL, all IITs, DRDL, ITI.
1973
 First ever display of Indian Designed Electronics Products in Hannover Industrial Fair in West Germany - Participated Annually for the Next Decade. Started Export of APLAB products to Germany, UK and Sweden.
1973
 Designs of Aluminum Extrusions for Equipment Packaging Meeting German DIN Standards. Progressively in all Instrument Housings in APLAB range .
1974
 Adoption of German Standards like DIN in Product Packaging and Use of VDE Standards in Safety Compliance. Resulted in high quality and reliability reputation for APLAB products in India & abroad.
1975
 Development of LAB Series of Standard Single and Multi-output DC Power Supplies for German, French and British Market. This series survived for the next 25 years and is sold even today in limited numbers.
1976
 10MHz and 15MHz Single and Dual Trace Analogue Oscilloscopes. Sales in Domestic and German Market.
1978
 Developed Cable Fault Locator for Seba Dynatronics GmbH. Several thousand units exported to Germany for next 7 years.
1979
 15" High 20ft long Electronic Audio-visual Scrolling Text Display using 6V DC Lamp Matrix. Maharashtra Bank Pune Bldg and other customers in Bangalore and Delhi.
1980
 Complete Range of DC Power Modules for India's First Digital Telephone Exchange being developed by Telecom Research Centre, New Delhi. Slow policy and material support killed this government initiative.
1981
 8080 Based Multi Application Micro-processor based Brain System for Analog & Digital Data Acquisition. Industrial Control Division Made Products Using this Core.
3.
Public Service 1982 to 1992 ++
Year
Product
Some Users
1982-83
 Wrote policy note that helped Mrs. Indira Gandhi to rewrite Electronic Policy that delicensed Consumer electronics sector and enable easy export of software services. This lead to India's Electronics Output Growing from 1200 to 9400 crores from 1984 to 1990.
1984
 Video Tape based TELETEACH program to provide low cost audio-visual programs to enrich school and technical education as well as livelihood skills training to artisans. Program Succeeded with Sale of 150000 Cassettes but received no support form Education Ministries.
1985
 India's first Rs.5000/- 20" Colour TV under ET&T Brand. Sold over 150,000 reaching to lower middle class families.
Sold over half-million with 40% market share. C-DOT adopted the same model for Rural Exchanges.
1985
 India's first Rs.1400/- 14" B&W TV under ET&T Brand.
1985
 A new concept to support SMEs under MTB scheme, that allowed SMEs to get 100% material kit, proven technology and the use ET&T brand.
1987
 People's PCXT Computer System at Rs.10,000/- with three software packages for word processing, a spread sheet and fully licensed MS DOS operating system. Several Thousand sold, pushed Wipro and HCL to drop their prices to half.
1988
 Fully Automated Shooting Range for National Security Guards in NSG HQ in Mannesar, Delhi. Used for training and Prime Minister National Sharp Shooter Competition till 1994.
1990
 Developed the first EE PROM chip for Smart Cards produced in India by SCL Chip foundry in Chandigarh.  
1990
 Programmable Electronic DC Loads. Domestic and Export Markets.
1991
 Automatic Battery Test System with Programmable Electronic Charge Discharge Power System. Exide, BEL and Other Battery Manufacturers.
4.
1992 to 2002 ++
Year
Product
Some Users
1992
 Developed first stored value smart card Public Payphone in India. 3000 installed in Delhi city and in Parliament...Ensured 100% revenue collection compared to 30% on the coin boxes. Growth was killed by DoT under Sukhram since we did not want to bribe.
1993
 Exported 100 Smart Card Public Payphones to Belgium. Bulk contract lost due to lack of Government support to give project credit.
1994-95
 Developed multi-cassette Automated Teller Machine, ATM, for Indian Banks with local language user support. Sold over 200 machines to Indian Banks but the project died with lack of support by Indian bankers who blocked us from tender by insisting on minimal installed base of 1000 ATMs...Art of kissing Indian Technology.
1998
 Developed Self-service Kiosks for Cheque Depositing. Several hundred functional in Indian and foreign banks.
1999
 Sine wave inverters up to 2 KW for the German railway/ Military application with Static switch & Manual Bypass arrangement up to 4.5 kW. Powertronic GmbH, Germany.
2000
 Programmable/ Non Programmable Active DC loads up to 5 KW: Dissipative current loads with CC/ CV/ CR/ CP mode of Operation. Aplab, powertronic GmbH, Zentro Electric GmbH.
2001
 Automated Test Systems/ Cassette Instruments: 19” rack mount programmable instruments for the automated laboratory testing consists of DC Calibrator, Signal Generator, Multi-meter, Relay multiplexors, counters in the 19”, 3U,1/6 rack cassettes. Megalab UK Limited, Megatron KG Germany.
5.
2002 to 2012 ++
Year
Product
Some Users
2001-2002
 Evolution thermal management of power electronic components - optimisation, custom heat-sink profiles, compact, high density packaging. Thermal Management Techniques.
2003
 Zero up version power supply for power level from 200 W to 2.4 KW for the various output voltages. BK Precision, APLAB, Zentro Electric GmbH, Advance Power UK.
2003
 Developed Automated Retail Fuel Dispensers with built-in computer for on-line data acquisition. Several Thousand Sold to IOCL, HPCL, BPCL and Exported to Africa.
2004
 Self-service Terminals for Automatic Check Deposit. ICICI, HDFC, CITI and other Banks.
2004
 Medium Power switch mode Power Supplies: 19” rack mount 3U half rack module, single output power supplies using Forward converter Topology: Average Efficiency 88 to 90%. German Railways/ Siemens.
2005
 97xx series Variable frequency variable voltage frequency converters.
Programmable & non programmable version up to 1 kW.
(40 – 250 VAC & 45 – 450 Hz).		 Aplab, Zentro Electric GmbH, Advance Power UK.
2006
 Street Lighting Energy Savers.
2.5 kW to 50 kW single phase & 3 phase lighting energy savers are designed for the high intensity lighting application.		 Blueline - Singapore, APLAB.
2007
 Power factor corrector up to 6 KW power supplies:
Topology: Continuous Boost: UC3854N, UCC3817N One cycle control IC IR1150 with the Silicon Carbide zero recovery diode for efficient control of the power factor.		 BK Precision Inc, USA, Zentro electric GmbH, Aplab.
2008
 Programmable version of the power supplies. (With RS232, RS485 and GPIB interface).
LAC Series: PC interface through RS232, RS485, GPIB (IEEE488), SPIB (Specially designed for the multi-instrument serial communication).
97XXX / PPS/ PPD Series: Linear version of the power supply Compliant with IEEE488.2.		 BK Precision Inc, USA, Zentro electric GmbH , Aplab.
2009
 High Power Density 1U high Telecom PSU -2.5kW/ 48V Li-Ion Battery Chargers for Electric Vehicles. Several thousand Exported to Germany.
2010
 Intelligent Energy Controller for PV Module Energy Maximizer Australian Innovation Patent.
Suryaprasad Home Solar System - Sungrace.
Portable Solar Vehicle Battery Chargers.		 Mumbai's first 30kW Roof Top Solar Power Plant.
Several Hundred Roof top Solar Systems to Indian Railways.
2011
 SAVEOPTIMA Intelligent Energy Savers 5 -250kVA. UK, APLAB.
2011
 Leech HV PV Module with All Parallel Solar Array.
Solar Pot -Intelligent Solar Energy Accumulator.		 1kW to 20kW Hi Yield Solar Power Plants.
2012
 Solar Pot - Intelligent Solar Energy Accumulator with MPPT, and Charge/ Discharge Level Controller.  
 
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