10/21/13 Solar Lamp With Variable Power Supply And Charger

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C I R C U I T L A B

Solar Lamp With Variable Power Supply And Charger

S.C. Dwivedi

A simple circuit of a solar lamp with variable power supply and charger is described here. It is usefulwhere mains power failure is frequent. The power supply can be used for testing electronics projectsand also charging your mobile phone battery. You can save on your electricity bills by switching to analternative source of power using this circuit. The circuit works with the solar panel (without mainspower supply) and can be used as a solar lamp during daytime (with the solar panel), night lamp (with external 12Vbattery), variable power supply (1.5V to 15V) and mobile battery (3.6V) charger.

The photovoltaic module or solar panel used here is capable of delivering a power of 5 watts. At full sunlight, it outputs16.5V. The solar panel can deliver a current of 300-350 mA. Using it you can charge Li-ion batteries common in mobilephones.

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10/21/13 Solar Lamp With Variable Power Supply And Charger

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46 26 13 Post Comment | 25 Comments

pravpa 390 days ago

What will be the cost of Solar Panel 16.5V watt ???Is it Possible to Charge aExternal 12V Batt. from CON1??? Reply 1 Reply

p.ranchith kumar 366 days ago

1.THE COST OF THE SOLAR PANNEL IS VARIES FROM Rs.65 T0 Rs.160 PER WATTDEPENDS ON THE SUPPLIERS Reply

maniivannan 388 days ago

1.12v battery why wattes? 2.does the 12v battery can be able to charge? Reply 2 Replies

vedashree 380 days ago

where do we get the solar panel what might be the cost to build this circuitwhere can we get the components to build thecircuit?

Reply 2 Replies

p.ranchith kumar 366 days ago

IN CHENNAI IT IS AVAILABLE AT RITCH STREETIN COVAI AT UPL SOLARIN VELLOR ARNISOLAR@GMAIL.COM Reply

The working of the circuit is simple. The output of the solar panel is fed to the circuit via diode 1N4007 (D3), which actsas a polarity guard to protect the solar panel.

For using the small LED-based lamp in daytime, just flip switch S1 to ‘on’ position. All the 5mm white LEDs (LED1 throughLED22) glow. To get a higher light intensity, you can use a reflector. Similarly, if you want to use the lamp at night,connect a 12V battery to the anode of diode D1.

For using the variable power sup-ply, flip switch S2 to ‘on’ position. Connect a multimeter across CON1 terminals and setthe required voltage (say, 9V) using potmeter VR1. The 9V output will be available across CON1 terminals. As mentionedearlier, the range of the power supply is 1.5V to 15V.

For charging a Li-ion battery (used in mobile phones), flip switch S3 to ‘on’ position and use connector CON2. Zener diodeZD1 provides 4.7V to charge the Li-ion battery. Using this circuit, you can charge a 3.6V Li-ion cell very easily. ResistorR13 limits the charging current.

Assemble the circuit on a general-purpose PCB and enclose in a small box. Mount RCA socket on the front panel of thebox. Use RCA plug with cable for connecting the battery and LEDs. Also mount all the switches on the front panel of thecabinet.

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10/21/13 Solar Lamp With Variable Power Supply And Charger

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Efy Admin 360 days ago

To get solar panel please contact our associates Kits'n'Spares at info@kitsnspares.com Reply

p.ranchith kumar 366 days ago

1.to get constant power to load we require battery2.the output of lm317set as 14.5V is connect to 12v battery to charge. Reply 1 Reply

Madhan 213 days ago

Battery 12V what is Ah required?? and for 100 Watts Solar Panel how much Ah Battery required? Reply

irfan 380 days ago

can we charge 3 or more Li ion batteries from this circuit? and what are the changes required in this circuit... Reply

SWARANDEEP 377 days ago

during night time we need light ..can we make it possible using this circuit Reply

BHARATH KUMAR 349 days ago

how to draw block diagram for this circuit.......... Reply

Pradeep 349 days ago

what is the function of LM-317 IC in this circuit Reply 2 Replies

ravikumar 299 days ago

317 is the ic for the operation of voltage regulation and also which gives the variable voltage by using pots connected toadjust pin and output pin

Reply

p.ranchith kumar 345 days ago

act as voltage regulators Reply

Arumugam 324 days ago

To charge 12V battery can we connect across CON1 ? Reply 1 Reply

MURALIMOHAN 267 days ago

it is possible to charge external 12v battery. u have to just adjust the pot to get a 14v out at the con1then simply connect itReply

alfredmanoj 265 days ago

Could we charge up the 12v battery using solarpanel?? Reply

SAMPATH 248 days ago

What is the out put of IC1LM317?

Reply

BHARATH 244 days ago

How much amperes of current will be produced at the first Output sidein LED Circuit............. Reply

Gopinath 239 days ago

what is the output of LM317?where do i need to connect that 1.5 volt? Reply

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sam 236 days ago

what is the out put of the IC1LM317 and explain polarity of input and out put? Reply

dheeraj 226 days ago

It is possible to connect 12v dc motor fan from CON1? Reply

BHARATHKUMAR 217 days ago

Is only diode is sufficient to provide protection for solar panel Reply

BHARATHKUMAR 217 days ago

How much Ah battery is required for storing energy from the solar panel ......? Reply 1 Reply

Hunter 206 days ago

Hey use a 12V 4.5Ah battery which u can get for less than 100Rs...so u can use the LEDS on for longer time... Reply

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