CircuitLab | sketch, simulate, and share your circuits USB / DC / Solar Lithium Ion/Polymer charger [v1.0] ID: 390 - $24.95 NOTE: This product is only designed for use with solar panels sold at the Adafruit store. We cannot guarantee this will work with solar panels purchased elsewhere. Please purchase this kit and panels from Adafruit to ensure optimized functionality! Make your projects to go green this summer with our specialized USB/Solar Lithium Ion Polymer Battery charger! This charger is a very unique design, perfect for outdoor projects, or DIY iPod chargers. We've spent over a year testing and tinkering with this charger to come up with a plug and play solution to charging batteries with the sun and we're really pleased with what we ended up with. Easy to use! Our carefully designed charger is designed specifically for solar charging, and will automatically draw the most current possible from the panel in any light condition! Please note! For use with Adafruit Lipoly/LiIon batteries only! 3.7V/4.2V Lithium Ion or Lithium Polymer battery charger Charge with 5-6V DC, USB or 6V solar panel!
SparkFun Electronics Hijack Introduction HiJack is a hardware/software platform for creating cubic-inch sensor peripherals for the mobile phone. HiJack devices harvest power and use bandwidth from the mobile phone's headset interface. The HiJack platform enables a new class of small and cheap phone-centric sensor peripherals that support plug-and-play operation. Model: TES52959P hijack project The Hijack kit includes: Hijack mainboard Hijack programmer HiJack ProtoBoard Grove-Universal 4 Pin cable X5 Bug Tracker Because of the connector we used in last batch can not be found in market, we have transferred to the original hijack version, which we found a fatal bug in the connector. How does Hijack works Power. Download the firmware The Hijack is shipped with a firmware downloaded into it's MCU. 1. 3. If you see the "xxxx bytes programmed" message, the firmware download is OK. Schematic Hijack mainboard.PDFProgrammer.PDFProtoBoard.PDF Cautions Specification May include key specifications and other specifications. Application
MacSpice 3f5 - Circuit Simulator for Mac OS X Quasar Electronic Kit Module Project UK: Industrial Educational Hobby Graphene supercapacitors are 20 times as powerful, can be made with a DVD burner A team of international researchers have created graphene supercapacitors using a LightScribe DVD burner. These capacitors are both highly flexible (pictured below) and have energy and power densities far beyond existing electrochemical capacitors, possibly within reach of conventional lithium-ion and nickel metal hydride batteries. The team, which was led by Richard Kaner of UCLA, started by smearing graphite oxide — a cheap and very easily produced material — films on blank DVDs. These discs are then placed in a LightScribe drive (a consumer-oriented piece of gear that costs less than $50), where a 780nm infrared laser reduces the graphite oxide to pure graphene. The laser-scribed graphene (LSG) is peeled off and placed on a flexible substrate, and then cut into slices to become the electrodes. These graphene supercapacitors could really change the technology landscape. Read more at Science (paywalled) [Image credit]
The World Famous Index of Arduino & Freeduino Knowledge N R Bardwell Ltd - Social Making: Hardware design tools for the web - Upverter Arduino Shield List Spiratronics - The Home of Project Electronics Build A TENS Machine to Remove Pain A Tens machine is used to provide a drug free way of removing pain from your body ( TENS stands for Transcutaneous Electrical Nerve Stimulation ) .Here I will show you how to build your own Tens machine and reduce the amount of pills you use to stop pain .To Build this Tens unit, you will first need to buy a 555 timer IC . The 555 timer is very small about a quarter of the size of your finger nail .You can purchase one for about 25p from Maplins or Radio Shack etc . There are 2 types of Tens machine. Low frequency Tens uses frequencies from 2 to 4 Hz . Square waves are universally encountered in digital switching circuits and are naturally generated by binary (two-level) logic devices.
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