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Solar Lighting for Rural & off-grid use

Tata Power has started selling its PV products through snapdeal.
Here is the link to a product I have known for a while.

http://www.snapdeal.com/product/tata-venus-1-solar-home/1470961052

It is a robust system and should last years.  The light is of the CFL type. The lamp is actually a 4 Pin PL lamp which is more efficient than the traditional 2 pin variety.

A 4-Pin lamp uses a pre-heat technology for firing the lamp, and hence has a much longer life.  It also prevents blackening of the lamp at the electrode ends.

Tata Solar Venus 200 C - Home Lighting System

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Design & Development of Annunciator . For a California based Company redesigned their annunciators around modern technology. The annunciators could handle 1 to 128 input modules with inputs to display from 8 to 1024 zones. The original full analog design was simplified with a single main PCB with a powerful microcontroller and multiple smaller PCBs with smaller microcontrollers, Analog & Digital inputs and outputs. PC based Software was developed to configure the system for multiple parameters. The duration of the project was 8 months.Test jigs were replicated at both places (USA & Goa, India).