Category Archives: solar cell

Give Your Solar Garden Lights A Color Changing LED Upgrade

White LEDs were the technological breakthrough that changed the world of lighting, now they are everywhere. There’s no better sign of their cost-effective ubiquity than the dollar store solar garden light: a complete unit integrating a white LED with its solar cell and battery storage. Not content with boring white …read more

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Posted in boost converter, color changing, garden, garden light, joule thief, led, led hacks, nocturnal solar light, solar, solar cell, solar hacks | Leave a comment

Solar Circuit Sculpture Pumms the Night Away

A word of warning: Google for the definition of the word “pummer” at your own risk. Rest assured that this beautiful solar-powered circuit sculpture fits the only definition of pummer that we care to deal with.

For the unfamiliar, a pummer is a device from the BEAM style of robotics, …read more

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Posted in 74hc240, art, beam, brass, Circuit Sculpture, photovoltaic, pummer, pv, satellite, solar cell, supercapacitor | Leave a comment

DIY Vs. Commercially Made Solar Panel

The price of commercially made solar panels on eBay is around $1 per watt and have been for a few years, but the price of individual solar cells are likewise at a low price per watt, around $0.48.  Looking at those prices, it’s tempting to say that it’d be cheaper to just buy the solar cells and put together your own panels. But is it? Simply adding up all the costs might seem like a good way to tell, but you’d need to make a panel to really see what works and what doesn’t.

Part US$ Euros €
solar cells

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Posted in solar, solar cell, solar hacks, solar panel | Leave a comment

Energy Harvesting Design Doesn’t Need Sleep

Every scrap of power is precious when it comes to power harvesting, and working with such designs usually means getting cozy with a microcontroller’s low-power tricks and sleep modes. But in the case of the Ultra Low Power Energy Harvester design by [bobricius], the attached microcontroller doesn’t need to worry about managing power at all — as long as it can finish its job fast enough.

The idea is to use solar energy to fill a capacitor, then turn on the microcontroller and let it run normally until the power runs out. As a result, a microcontroller may only have …read more

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Posted in attiny85, bpw34, energy harvesting, Microcontrollers, photodiode, Power Harvesting, solar cell, solar hacks, solar power, The Hackaday Prize | Leave a comment

Smart DC Tester Better than a Dummy Load

Testing DC supplies can be done in many ways, from connecting an actual load like a motor, to using a dummy load in the manner of a big resistor. [Jasper Sikken] is opening up his smart tester for everyone. He is even putting it on Tindie! Normally a supply like a battery or a generator would be given multiple tests with different loads and periodic readings. Believe us, this can be tedious. [Jasper Sikken]’s simulated load takes away the tedium and guesswork by allowing the test parameters to be adjusted and recorded over a serial interface. Of course, this can …read more

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Posted in Microcontrollers, power supply, solar, solar cell, supply, tool hacks | Leave a comment