Showing posts with label solar. Show all posts
Showing posts with label solar. Show all posts

Friday, 15 January 2016

6V Solar battery charger circuit using LM317

Today we are going to learn how to make a simple solar battery charger for 6V battery.

The solar charger we are going to make is based on LM317 regulator IC. When battery has reached is full charge voltage (Battery voltage is higher than VDz + 0.7v), our charger circuit automatically cuts the charging to protect the battery form damage. The LED light will indicate the full charge state in the battery.

Our charger circuit will work only when the voltage level from the solar panel is much higher than the battery voltage, unlike the solar charger with regulator and controller that can charge regardless the solar voltage.

Part List:-

Solar - 12V solar cells array

C1 - 470uF electrolytic capacitor rated 25V

D1, D2 - 1N5400 or any rectifier diode rated 2A minimum

Dz - 1N5235B or any 6.8V zener diode

R1 - 3 kilo ohms 1/4Watt

R2 - 330 ohms 1/4Watt

R3 - 560 ohms 1/4Watt

R4 - 2 kilo ohms 1/4Watt

LED -3mm or 5mm Red or any low power LED

Q1 - 2N2222, CS9013, or similar NPN transistor

Bat - 6V lead acid battery

Make the above simple circuit to charge your 6V battery from clean and environment friendly energy.

If any query arises pleas ask them in the comment section, i will be happy to answer.

Wednesday, 19 November 2014

How to install solar panel at roof top and stay off the grid life chapter-2

How to select the type, Quality and quantity of Solar Panel for living a Grid free life. What are the total daily Wattage requirement for average household.


How to select the best solar panel for home to enjoy grid free life, is the most popular question asked by the guys all around the world. To understand how to choose the solar panel array one should be familiar with certain electrical terminology which are ( if you simply know this basic thongs skip this paragraph):

  • Voltage
  • Amperage
  • wattage 

    Voltage: The potential difference between two points. Is measured in Volts (V) and has the symbol                   ‘V’.

    Current: The flow of electrons in a circuit. Is measured in Amps (A)and has the symbol ‘I’.

    Resistance: A material’s opposition to an electrical current. Is measured in Ohms (Ω) and has the                          symbol ‘R’.

    Power: The rate of doing work. Is measured in Watts and has thesymbol ‘P’.

    Energy: The capacity for work, the product of power and time. Has the symbol ‘E’. The basic unit of              energy is the Joule, but electrical energy is normally expressed in Watt hours (Wh) or kilo                    Watt hours (kWh). One kWh is 1000 Wh.

    The relationship between these units is:

    How to install solar panel at roof top and stay off the grid life chapter-1

    How to install solar panel at home's roof top and save electricity and stay of the grid life forever-chapter-1

    What are solar panels?,  what are the types of solar panel?,  How efficient are they?


    From now we are going to start a solar panel project which will guide the solar energy enthusiasts to install solar pannel at home and stay grid free life.

    Before starting a step by step tutorial on How to install solar panel at home's roof top to stay off the grid life, we should know certain basic things first. These are:

    • we should know that what actually a solar panel is?
    • what are the types of solar pannels?
    • How efficient are they?

    What are solar panels?

    Solar panels are devices that convert the light into electricity (only DC). They are called "solar" panels because most of the time, the most powerful source of light available is the Sun, called Sol by astronomers. Some scientists call them photovoltaics which means, basically, "light-electricity."

    Solar panel wings installed on satellite in deep space

    A solar panel is a collection of small solar cells. Lots of small solar cells spread over a large area can work together to provide enough power to be useful like an power house. Here the more light hits a cell, the more electricity it produces, so spacecraft are usually designed with solar panels that can always be pointed at the Sun even as the rest of the body of the spacecraft moves around, much as a tank turret can be aimed independently of where the tank is going.

    special purpose DS1's solar cells are even more efficient than regular solar panels made for satellites because they use solar concentrators.

    Monday, 17 November 2014

    Make a Simple Solar MPPT Charger Circuit at Home

    How to Make a Solar MPPT Charger Circuit - Maximum Power Point Tracker Circuit

    Todat we are going to to learn how to make a simple but effective and cheap solar MPPT Charger circuit at home. Here MPPT stands for maximum power point tracker, which is an electronic charging system designed for optimizing the varying power output from a solar panel module such that the connected battery exploits the maximum available power from the solar panel.
    The output from a solar panel is directly proportional to the degree of the incident sunlight, and also the ambient temperature. When the sun  rays are perpendicular to the solar panel, it generates the maximum amount of Power, and deteriorates as the angle shifts away from 90 degrees  The atmospheric temperature around the panel also affects the efficiency of the panel, whose power falls with increase in the atmospheric temperature.
    Therefore we may conclude that when the sun rays are near to 90 degrees over the panel and when the temperature is around 30 degrees, the efficiency of the panel is maximum, Here the rate decreases as the above two parameters drift away from their rated values.

    Friday, 14 November 2014

    Make a 5V 2A Power supply by IC 78S05 simple circuit at home

    How to make a 5V 2A simple electronic power supply using IC 78S05 at home to charge cell phon battery.


    Today we are going to learn how to make a simplest 5 volt 2Amp DC simple power supply which can be used in various application like cell phon battery chargers like in Tabs ehich requires high current, LED Drivers which require less than 6 volt and high current , can bye used to charge a cell phon batttery using solar panel e.t.c. at home.

    This circuit is extremely simple and easy to make, simple to use and with very less component used.

    The main component in this circuit is IC 78S05 which is a Voltage regulator 5V / 2A DC. The quality of current is high and noise is low.

    The circuit will work without any extra components, but for reverse polarity protection a 1N5402 diode is included for safety at the input, extra filtering and removing any ripple is being done by capacitor C1-220uF 50V.

    Thursday, 13 November 2014

    Convert SMPS to solar battery charger circuit simple at home.

    Convert any SMPS circuit to solar battery bank charger


    Today we are going to learn how to convert or make a simple SMPS (Switched Mode Power Supply) solar battery charger circuit easily at home just by simply slightly modifying any SMPS electronic power supply.

    The post wi try to explains a very novel way of
    using an ordinary SMPS unit for charging a battery bank via solar panels.

    The method will result in an
    extremely efficient, compact, lightweight and fast solar charging of the connected battery.

    SMPS ( switched mode power supply) have become very common these days and we find them being used in the form of of low voltage DC units wherever needed. The best example is our cell phone chargers which are actually compact SMPS 5V DC chargers via 110v / 220v ac input.

    Solar power is becomming cheap and environment friendly and also becomming popular these days and guys are constantly in look out for good options in the form of solar chargers having the most efficient and fast charging response.

    Solar panels or PV devices are normally utilized for charging lead acid batteries which tends to takep relatively long hour for getting fully charged, and especially when the sunlight conditions are bad things start getting even more sluggish.

    For solution to the above problem is rather for enabling quicker charging from solar panels, special MPPT (maximum power point tracking) based solar chargers have been developed which effectively monitor the solar panel maximum power point levels and generate the most efficient charging conditions for the connected battery or battery bank to it.

    In this post we are going to finf most efficient way of charging our battery or battery bank through a solar panel.

    As proposed in one of my previous Post, a switch mode based power supply (SMPS) is probably the best option for making it work as a solar charger circuit, so here we will learn how to make an smps based solar charger circuit.

    Making an SMPS can be quite complex and might require considerable amount of time and knowledge for the implementations so here rather we will only focus on how to convert a ready made smps into an effective solar smps battery charger circuit quickly.

    For this we will require the
    following materials, assuming the battery to be charged is 12V rated: A ready made 120V or 220V to 12V SMPS unit having current ratinh equal to 1/5th of the battery AH which is to be charged for example if battery is of 12 v 100 Ah then 20 amp will be best selection.

    Connect all Solar Panels in series making  total open circuit voltage equals around 100V. Then connect wires.

    How to Proceed.

    As we all know a normal mains SMPS may be rated with minimum of 85V to 100V input in order to provide the required output DC, let's assume it to be 12V, meaning for acquiring 12V it must be supplied with a minimum of 100V at the input terminal.

    Keeping the above issue in mine we must select a solar panel which is able to produce approximately 100V to 220 volt any, for making the coverted SMPS work nice.

    Since PV panels with such high voltage might not be available, we may opt for many low voltage solar panel connected in series for generating the above voltage. For instance you can go for 3nos. of 30V solar panels and connect them in series to get 90V from it, which might just do the job.

    The above input supplied to the procured SMPS would generate the required 12V which may be directly attached to the battery for charging it efficiently.

    However a 12V supply might not charge a 12V battery we need at least 14V