Magnetic Tools. Start Up Project 17


2AIt is a time consuming job to search small nuts and screws if lost somewhere when we open a gadget. Most of the electronic devices like Mobile phone, Laptop etc use different types of small screws which we can’t get from shops once lost. It is very difficult to see these tiny screws if fall in between the circuit or floor. So this is a simple trick to secure all the screws once unscrewed. Neodymium magnets will help us to secure the screws. Make these Magnetic tools because it is a must for the technician or a project builder.
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Portable Solar Generator. Start Up Project 16


7AWhat will do if you are in a place where AC is not available to power your gadgets ? You can carry this Portable Solar Generator to a Picnic spot where AC is not available. It lights a CFL to provide sufficient light and AC for charging Mobile Phone, Tablet etc and can even play a small CD player. Alternately you can use the unit in home during Power Outage days. It converts the 12 V DC from the battery to 220V AC to light the CFL. It has a bulb holder to fix the CFL and an AC outlet to tap AC for other purposes. It uses a simple 20 Watts CFL Driver board to converts DC to AC. The battery can be charged using a 12 V Solar panel or 12V DC Adapter. The battery used in this unit is 12V 3 Ah (3 Ampere Hour) rechargeable Lead acid battery which can power the CFL many hours.
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Solar Day Light. Start Up Project 15


1Why use lights during day time to waste electricity? Sometimes we need it in some rooms. We can go for a “Green Solution” to harvest Solar energy for lighting an LED light during day time. Just fix a small Solar panel and a Strip LED. It needs no battery  because the solar panel itself acts as a battery. It generates DC voltage when the Photons of the Sunlight energize its semiconductor. So the light remains on throughout day time. You need only a 12V Solar panel and a Strip LED. Connect and relax. It will do its work for 20 years. No circuit is in it and you can easily connect it.
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Portable Mobile Charger. Start Up Project 14


2AWhy going for a costly Power Bank to charge Mobile Phone? Just use a 9V battery and a few components to make a Portable Mobile charger. Its cost is just Rs.25 and if you use a Rechargeable 9V battery, it can be used up to three years. The Mobile phone battery is a high efficient long lasting Lithium Ion battery that has thousands of charge / discharge cycles. It requires 4 -6 volt DC for charging and the charging current can be between 200- 400 mA. We can drop the 9V from the battery to 6 volt using a Voltage regulator. That’s all. Make it and enjoy the satisfaction of a project building.
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Hacked Mobile Battery. Start Up Project 13


4AHere is a “Green Project” for you to reuse the discarded Mobile phone battery. When I purchased a new Mobile phone, the old one became junk. But it has a very good high efficiency and long lasting Lithium Ion battery rated 3.7 V, 1800 mAh. So I decided to reuse the battery for an alternate purpose. A simple power supply with DC- DC Booster capacity and a White LED emergency light. It can be charged from any USB charger or Laptop. Its output can be adjusted from 3.7V to 37 volts. The DC-DC Booster module boosts 3.7V from the Mobile battery up to 37 volts when turning the pot. The Power supply unit is ideal to power all projects that require 3.7 V to 37V. Its emergency light helps to do work in low light conditions. You have a number of Mobile battery in your Junk box. So try this Green project .It is a worth.
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Boost Charger for Mobile Phone Battery. Start Up Project 13.


A1Why allowing Mobile Phone battery for a “Deep Sleep”. Many times we replace the Mobile battery without knowing this Deep sleep property of the battery. Actually the battery is good and we can easily revive the battery from deep sleep just giving a “Shock”. The trick is very simple and you can use the battery again. How the Mobile battery enters into deep sleep? In the Mobile phone battery, there are three pins to connect the battery. One is Positive and the second one is Negative for charging. Then why a third pin? It is known as BSI Pin (Battery Status Indicator). If we are not properly charging or leaving the battery unattended for long time, the Mobile phone will not detect the battery for charging. So by removing the battery and giving a “Boost pulse”, the battery will “Wake up” from sleep and starts charging. Best trick. You need only an USB cable and two pins. You save 350 -500 Rupees. Let us learn the trick.
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Button Torch. Start Up Project 12


2AProbably, this may be the smallest 1 Watt LED Torch working on a Watch battery. It is the “Micro Joule Thief circuit” that is made as compact as possible. It rests on a heat sink of the 1 watt LED and powered by a 1.5V Button Cell. We can make different types of Joule Thief circuits and this experimentation is to make it as small as possible. Try it.
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