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Photovoltaic Solar Power Load & Battery Charge Controller - Keep drinks cool in the field without flattening your car battery. __ Designed by Henry
Photovoltaic switch disables unused LEDs - 03/18/04 EDN Design Ideas: in many applications, it's desirable to disable LEDs used for system verification. Many options are available for the disabling function, including manual SPST (single-pole single-throw] switches, enhancement- and depletion-mode MOS Design by Lance McBride, Monterey Bay Aquarium Research Institute, Moss Landing, CA
Piezoelectric Energy Harvester with Battery Backup - The LTC3388-1/LTC3388-3 are high efficiency step-down DC/DC converters with internal high side and synchronous power switches that draw only 720nA typical DC supply current at no load while maintaining output voltage regulation. The EN pin can be used to activate the LTC3388-1/LTC3388-3. For instance, in this circuit the__ Linear Technology/Analog Devices App Note, Jul 23, 2010
Portable Solar Battery Charger - Here's a neat little project that uses both your ham and carpentry Homebrewing skills. (No jokes about my woodworking, now) About a year ago, I bought a 5 Watt solar panel on sale at Harbor Freight. it's an IC P Battery Saver Pro, and will supply about 15 Volts DC at 335 mA in full sunlight, which is about perfect for the 7 AH batteries I usually use for QRP portable __ Designed by Monty Northrup
Portable Solar Lantern Schematic - This portable solar lantern circuit uses 6 volt/5 watt solar panels are now widely available. With the help of such a photo-voltaic panel we can construct an economical, simple but efficient and truly portable solar lantern unit. Next important component required is a high power (1watt) white LED module. When solar panel is __ Contact T.K. HAREENDRAN
Portable Solar Power Inverter - A compact and portable 12V solar power inverter circuit that will keep away darkness. This tried and tested design converts 12V DC from the storage battery of any solar power system to 230V AC that is enough to power a number of energy saving CFLs. Just feed 12V DC input through input jack J1 (with right polarity) and flip __ Contact T.K. HAREENDRAN
Power Diode For Solar Power Systems - Apart from the sun, solar power systems cannot work without a reflow protection diode between the solar panel and the energy store. When current flows into the store, there is a potential drop across the diode which must be written off as a loss in energy. in the case of a Schottky diode, this is__
Power Supply 5v Solar - This project uses the 1.2v rechargeable battery and solar panel from a Solar Garden Light. These lights can be bought for less than $5.00 in most $2.00 shops or similar shops that sell general household items. __ Contact Collin Mitchell
PowerSmart Solar Speeder V2 - This must be the most efficient bipolar transistor motor driver design for this application and I recommend it for the solar roller competitions. A 1381E is used to trigger at 2.4V. While it takes a total of 10 components plus motor compared to the stock circuit's 6 components, you will __ Designed by Wilf Rigter
Put Together an REUK Solar Lighting Kit - Full construction plans for solar powered shed or garage lighting using LED spotlights. __ Designed by REUK-Renewable Energy UK website
PV Solar Cell Test Fixture - This is an illustration of a test fixture, which can be used to test individual solar cells for short circuit current. Using a PIN photo diode and a control circuit, the solar cells can be tested under constant light level conditions . . . Hobby Circuit designed by Dave Johnson P.E.-October, 2006
PV Solar Panels-Ideal Blocking Diode Circuit - Solar panels usually include a diode at their outputs. The diode prevents current from back feeding into the panel at night from the battery being charged by the panel. But, this diode does waste some power and does reduce the available panel voltage . . . Hobby Circuit designed by David Johnson P.E.-March, 2011
Reduce voltage to Photovoltaic Solar Panel with Ideal Diode - Solar panels usually include a diode at their outputs. The diode prevents current from back feeding into the panel at night from the battery being charged by the panel. But, this diode does waste some power and does reduce the available panel voltage. . . Circuit by David Johnson P.E.-March, 2011
Reed Switch Wind Turbine RPM Meter - Find out how to use a reed switch to make a wind turbine RPM meter. __ Designed by REUK-Renewable Energy UK website
Remote Solar LED light - I created this circuit in an attempt to make the simplest possible solar powered project. it would make for an excellent science fair project, and would also serve as a good introduction to solar powered circuitry. it may also have some practical uses, such as shedding some light into a dark part of your house. The idea is simple, the solar panel converts sunlight into a trickle of electricity. The electricity is used to run a white LED __ Designed by G. Forrest Cook
Remote Solar LED light - This circuit was created as an attempt to make the simplest possible solar powered project. it would make an excellent science fair project, and can also serve as a good introduction to solar powered circuitry. The circuit has some practical uses such as shedding some light into a dark part of your house. The idea is simple, the solar panel converts sunlight into a small electric current. The current is sufficient to power a single white LED. __ Designed by G. Forrest Cook
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