10/21/13 Solar Lamp With Variable Power Supply And Charger electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=884&article_type=1&id=689&tt=unhot 1/4 Circuits ∨ Careers Videos ∨ Features ∨ Technical Articles ∨ Special ∨ Lighting Solar Automation ∨ Automotive Defence & Aerospace Consumer Electronics Medical Power Communication ∨ Subscribe to Electronicsforu.com Email Address Go 46 Related Circuits Multifunction Power Supply AC-Powered Led Lamps Without rectifiers Turn Your Old Inverter Into An Emergency Power System Simple Stereo Level Indicator 1.5 Watt Power Amplifier ELECTRONICS ZONE Engineer's Corner Business Corner Daily News Yellow Pages Jobs eZines & Publications Login | Register | Advertise | About Us | Contact Us 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 useful where mains power failure is frequent. The power supply can be used for testing electronics projects and also charging your mobile phone battery. You can save on your electricity bills by switching to an alternative source of power using this circuit. The circuit works with the solar panel (without mains power supply) and can be used as a solar lamp during daytime (with the solar panel), night lamp (with external 12V battery), 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 outputs 16.5V. The solar panel can deliver a current of 300-350 mA. Using it you can charge Li-ion batteries common in mobile phones. Private Cloud Solutions www.NetApp.com/PrivateCloud Maximize ROI & Reduce Costs with NetApp® Private Cloud Solutions.
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10/21/13 Solar Lamp With Variable Power Supply And Charger
Circuits ∨ Careers Videos ∨ Features ∨ Technical Articles ∨ Special ∨
Lighting Solar Automation ∨ Automotive Defence & Aerospace Consumer Electronics Medical PowerCommunication ∨
Subscribe to Electronicsforu.com
Email Address Go
46
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Multifunction Power Supply AC-Powered Led Lamps Without rectifiers
Turn Your Old Inverter Into An Emergency Power System Simple Stereo Level Indicator
1.5 Watt Power Amplifier
ELECTRONICS ZONE Engineer's Corner Business Corner Daily News Yellow Pages Jobs eZines & Publications
Login | Register | Advertise | About Us | Contact Us
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.
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 [email protected] 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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