# Affordable Technology in Schools

## Electricity Tariff in Karnataka as of March 2016

Domestic consumers (rural): The tariff for the monthly consumption of up to 30 units is increased from ₹2.60 per unit to ₹2.90 per unit and for consumption between 31 and 100 units the tariff is increased from ₹3.70 per unit to ₹4.10 per unit.

The tariff for the monthly consumption of 100-200 units is increased from ₹5.10 to ₹5.60 per unit and for consumption above 200 units per month, the tariff is increased from ₹5.90 to ₹ 6.40 per unit.

## How to Calculate kWh or 1 Unit of Electricity Consumption

Energy = Power * Time or E = Watt * Time

When we say we have consumed 1 unit of electricity, that means we have consumed 1kWhr of electrical energy.

1 Unit = kilowatt hour. i.e. 1 Unit = 1kWhr

Example 1: Suppose if you use 10 watts of a lamp for 100 hours, the electricity consumed will be 1000 watt hour. That is 1kWhr, nothing but 1 Unit of Electrical Energy.

Example 2: suppose you have a bulb of 100 watts and it lights for 15 hours a day,30 days a month then the energy consumed is = 100*15*30=45000 watt hours= 45 kWh or 45 units.

Example 2: suppose you have a 22 inch LED TV in your classroom which consumes 55 watts and it is switched on for 8 hours a day, 25 days a month then the energy consumed is = 30*8*25=6000 watt-hours = 6 kWh or 6 units.

Example 3: So the electricity bill per month for 22-inch monitor in school is Rs 6 units*2.90= Rs 17.4 (or Rs 20 approximately) (Electricity rate will go up above Rs 5 per unit if you consume above 100 units per month)

Power Consumption of LED TV’s

## Monthly Cost Breakdown

1. Monthly Electricity Bill = Rs 20 per TV/Monitor ( We used example 3 for the calculation)

2. JioFi Monthly Data Charge = Rs 500 up to 4GB of data per month.

What do yo get-for 4GB of data

Note 1: Please note that you get unlimited data during night time if you want to prepare the school work/study material during night time

Note 2: JioFi hot spot is available for Rs 2000. This will connect up to 10 devices. Download speed is as fast as 25-50 Gbps, but average speed is about 10gbps

## Initial Expenses for Online Option

1. 22 inches LED TV – Rs 8000
2. JioFi or equivalent Hotspot Device – Rs 2000
3. Raspberry Pi – Rs 4000

Total Initial Expenses – Rs 14000
Monthly recurring charges – Rs 20+500 for electricity and wifi/internet

## Initial Expenses for Offline Option

1. 22 inches LED TV – Rs 8000
2. Raspberry Pi – Rs 4000

Total Initial Expenses – Rs 12000
Monthly recurring charges – Rs 20 only for electricity

Khan Academy Lite (Offline version of Khan Academy), offline version of Scratch and thousands of educational youtube videos’ can be downloaded into USB drive/memory and connect that drive/memory to raspberry Pi’s USB port or to TV’s USB port to start your classes.

## Initial Expenses in Rural Schools where there is no Electricity and 4G Data

If you have to tap power from the Sun through solar panels, a school is just the right place to begin from. Not only do the children get more “light hours” but they also learn how such technologies work, how it is installed and the ecological benefits.

1. 22 inches LED TV – Rs 8000
2. Raspberry Pi – Rs 4000
3. 100 Watt Solar Panel – Rs 5000
4. 40AH solar battery and inverter/switch – Rs 10000
(This will power 3 LED monitors)

Total Initial Expenses – Rs 27000
Monthly recurring charges – None

Khan Academy Lite (Offline version of Khan Academy), offline version of Scratch and thousands of educational youtube videos’ can be downloaded into USB drive/memory and connect that drive/memory to raspberry Pi’s USB port or to TV’s USB port to start your classes.

Affordable Technology in School

http://energyusecalculator.com/electricity_lcdleddisplay.htm

http://www.desigyan.com/trick-to-get-reliance-jio-4g-sim/

https://www.batterystuff.com/kb/tools/solar-calculator.html