Don’t throw away oldLaptop battery; it can be reused for other purposes. I hacked one Laptop battery and salvaged six high efficient Samsung Lithium Ion batteries each rated 3.6V, 4300 mAh. It is worth Rs. 1000. Few days before, I found that, my Laptop is not getting enough back up and shutdown immediately when the charger is removed. So I replaced the battery at the cost of Rs.1200. Due to curiosity, I just opened the case of the old battery pack and found that, the batteries inside can be reused. After testing, I found that only one battery out of the six is damaged. All the other five are in good condition. That damaged battery created the problem in the battery pack and prevented the remaining five batteries from their work. So actually this is happening in our Laptop. If one battery fails, we have to replace the battery pack. If the good batteries are salvaged from the old pack, we can reuse them for many different applications like LED lighting, Mobile charging, making power supply etc. So I spend Rs.1200 for the new battery pack but I salvaged 5 good batteries worth Rs. 1000 from the old battery pack. So my actual expense is only Rs.200. So do not discard the old Laptop battery. Tear it, salvage the individual batteries and reuse. You can save money and can reduce the e-waste. Continue reading →
I found that my UPS is not giving sufficient back up as expected for 20 minutes. I thought that I have to spend Rs. 800 to replace the battery. But I was not in a hurry. Want to find out the reason. After 5 minutes, the PC shutdowns. Why so? The UPS battery is not giving sufficient power (Ampere Hour) to run the load. The UPS battery is a 12 volt7 Ah (Ampere hour) Maintenance free Sealed Lead – Acidbattery (SLA). That means, it is “Maintenance free” and can be used for long time without any attention. But what happens is, the cells dry out due to heat generation. This happens after 6 months to 1 year of use . It is a Lead Acid battery that requires Electrolyte in the cells. So water is necessary inside. It has 6 individual cells giving 2V each. After removing the battery from the UPS, I found that it is very easy to rejuvenate the battery through “Hydration”. The battery will become top, if the dry cells are filled with battery water. Hydrated the battery and charged. Well, now it is giving more than 15 minutes back up. Saved Rs. 800 and reduced an e-waste. You can also rejuvenate the 6V Emergency lamp battery like this. So do it yourself. It is only a 10 minutes job.
Why wasting electricity for charging USB devices including Mobile phone? Sunis there to give power for this. Install a Solar Power Outlet in your home to harvest solar power for charging all USB devices in day time. Its cost is only Rs.500 and you get unlimited day power for more than 25 years to charge all USB devices. The expensive part of the project is Solar Panel. A 12 Volt 5 watts Solar panel costs around Rs.400 because the current rate is around Rs.80 per watt. The remaining components costs only Rs.100. So by spending Rs.500 initially, you can charge all your USB devices at the expense of only 6 Paisa per day . The calculation is for 25 years (50,000 Paisa / 9000 days = 5.5 Paisa). So hurry up to make this project. Continue reading →
PIR Sensor Module is one of the new introductions in electronics which is a highly useful device to switch on lights when it detects a human movement. It turns on the lights from 30 seconds to 3 minutes depending on the preset adjustments. Its range can be as high as ten meters which can also be adjusted. The module gives a high output when it detects the human movement. This high output can be used to drive a relay through a switching transistor. Let us see the details of PIR sensor module. Continue reading →
Energy Star sticker is seen in current hungry appliances like Fridge and Air conditioner. This indicates the energy efficiency of the appliances. Energy star denotes the international standard of energy efficient products implemented in 1992 by the Environmental Protection Agency and the Department of Energy .It was started in United States of America. The Devices carrying the Energy Star service label generally use 20–30% less energy than required by federal standards. So by comparing the stars, the consumer can choose the model . Continue reading →
There are predictions (or rumors) regarding the total blackness for three days from Dec 23 to Dec 25 2012. The predictions claim that the Universe will face a big change and the sun and earth are going to align for the first time. The earth will shift from the present three dimension to zero dimension and return back to the fourth dimension leading to the formation of a brand new world. The predictions also claims that on 21st December, the earth will enter a still ring called Photonic belt an extraordinary phenomenon that occurs once in 11 million years. A kind of showering with light from outer space. But the scientific world totally discarded such predictions and explains that the Photon belt is physically not possible because it requires the gravitational pull of a black hole with light rays being bent around the black hole forming a photon sphere. More over the Photon belt generating star Alcyone is some 440 light years away and the earth is moving away from the Alcyone. Anyway let us stay away from predictions and see the Photon belt phenomenon.
Lot of confusion… Mayans calendar, Nibiru Cataclysm, Solar Flare, explanations from scientific world… Why Mayans Calendar ends in 21st December 2012. So many beliefs and arguments. What is the reason for this? The Mayan calendar is the Mesoamerican Long Count calendar that is characterized by its non repeating nature. The long count calendar identifies a day by counting the number of days passed since the Mythical creation date corresponds to August 11 BCE 3114 in the Gregorian calendar. The Maya were an ancient civilization of the now called Central America and Southern Mexico. During their heyday, the Mayans have developed some calendars to track the sacred days and also to mark the start and end of cyclical periods. They developed one calendar called Long Count and tracked the future long time periods. A group of people think that the 21st December marks the end of the existing world and rise of a new world. They link the date with Nibiru cataclysm which is the encounter between the Earth and a large planetary object. What actually signifies December 21st? Let us move from beliefs and Archeology to Astrophysics Continue reading →