Tag: power

Smart Energy, Who Will Take the Initiative?

smart energyA few years back I was a part of heated discussed in my company about Smart Grid technology. Basically, our company was asked by a government institution in power sector to do all this. I, along-with one of my colleague, were on our way for a survey for a small demo to be presented before some government officials which could show them the “goodies” of Smart Grid. To demonstrate them how it can control billing, have advanced fault indications, energy harvesting, solve our greatest issue the energy theft and other features.

We spent days selecting the platform for demo as well as for long-term production. We prepared a list of several vendors offering solutions of smart meters. Suddenly the whole project got frozen due to lack of interest from the government agency. All our efforts were in vain. We, as a private company, could not invest resources in something which did not seem fruitful, at least for the time being.

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Solar Power Calculator

solar power calculatorOften we need to calculate the power ratings of different components in a solar power systems. This may include the battery rating, solar charger rating, number of panels and their ratings. It all depends upon the output load, charging time and resources available. Attached is a very simple excel sheet which helps to calculate these parameters. Just change the parameters on left to see the reflected output calculations on right.

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Power Supply Change-Over

The power supply change-over circuit is used where both Mains supply as well as power from rechargeable battery cells are used. The circuit, in normal mode, lets the power to be supplied from Mains to the circuit. When there is no input power, it switches on the supply from battery cells. When the input power resumes, it again cuts down the supply from battery cells and resume charging. Very simple but useful circuit.

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MC34063 5V Regulator

MC34063 is a very popular switching regulator. The good thing is that it is very cheap as readily available. Diptrace and PDF schematic below.

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