Knut Karlsen at blog.bareknut.no writes:
At home i always own some batteries lying around, either rechargeable or usual ones. Usually they are drip, but i’d like them to be always fully charged. I could use a usual charger and there is a collection of solar devices that remuneration rechargeable batteries. I wanted it simpler; why hasn’t anyone made a volley with integrated solar cells? The conception of the “SunCat” batteries where born.
This SMPS boosts low voltage (5-20 volts) to the turned voltage needful to drive nixie tubes (170-200 volts). Be warned: even though this trifling revolution can be operated on batteries/low voltage bastion -worts, the output is additional than enough to kill you!
Project includes:
Helper Spreadsheet
EagleCAD CCT & PCB files
MikroBasic Firmware Source
ohararp writes:
So there are a ton of instructables awning the use of rancid brightness leds. Many of them use the commercially available Buckpuck from Luxdrive. Many of them also use linear regulation circuits that first out at 350 mA because they are highly inefficient. This instructable serves to rent relatives notice that there are other options out there to drive rancid power leds.
photo from http://www.flickr.com/photos/pgordon/4093551889/
In everything from computer processor chips to car engines to electric powerplants, the absence to enlist rid of excess heat creates a major root of inefficiency. But new research points the style to a technology that might make it practicable to collect much of that dissipated heat and turn it into usable electricity.
A scornful ATMEL ATtiny13A microcontroller (IC1) is the brain of the globe. One pin (PWM) blinks the lights, most of the other pins are used for programming and power. You could attain selfsame effects with a 555 timer or discrete components, but our goal is to learn about a new microcontroller kin and make phenomenon manageable to hack. [via]
This is a tiny USB bombardment charger.With this tiny marking you can salary midpoint all devices that are charged via USB, like iPods or motile phones, with only two AA-Cells.most cash compenent of the cicuit presented in the sequential steps is the “LT1301″. This is a wry rapidity up converter for to build switching procedure power supplys with only a few external components.
The TiltStick is a caustic acceleration sensing badge in press of a USB stick. It’s using a two spindle acceleration sensor to common acceleration (caused e.g. by indicate and tilt). The badge is emulating a USB joystick and can thus be used in conjunction with any USB equipped publician (e.g. a touchstone PC or the Nokia N8XX relatives) without any special drivers.
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Electronics Exchange: share experience - [Link]
