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.
DIY Flexible Printed Circuits Get some thin sheets of polyimide which have copper on one or both sides. Polyimide is a yellow polymer with a high melting temperature and is sometimes called Kapton. A common type of copper-coated polyimide is DuPont "Pyralux" material. An I2C Tutorial. This I2C tutorial shows you how the I2C protocol works at the physical bit level discussing single master mode (a single controlling device) which is the most common use for I2C in a small system. I²C (pronounced I-squared-C) created by Philips Semiconductors and commonly written as 'I2C' stands for Inter-Integrated Circuit and allows communication of data between I2C devices over two wires. It sends information serially using one line for data (SDA) and one for clock (SCL).
Register interest for your @Raspberry_Pi. Board Only Raspberry Pi Model B 512MB RAM * Please note the Raspberry Pi does not come with the SD card included. SoC Broadcom BCM2835 (CPU, GPU, DSP, and SDRAM) CPU: 700 MHz ARM1176JZF-S core (ARM11 family) GPU: Broadcom VideoCore IV, OpenGL ES 2.0, 1080p30 h.264/MPEG-4 AVC high-profile decoder Memory (SDRAM): 512 Megabytes (MiB) Video outputs: Composite RCA, HDMI Audio outputs: 3.5 mm jack, HDMI Onboard storage: SD, MMC, SDIO card slot 10/100 Ethernet RJ45 onboard network Storage via SD/ MMC/ SDIO card slot 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.
How to Choose the Right Platform: Raspberry Pi or BeagleBone Black This article was originally posted at Michael Leonard’s blog and has been re-posted here. There are already many articles out there comparing Arduino, Raspberry Pi, and BeagleBone Black; this is not one of those articles. I believe it is clear that Arduino is in a different league than the Raspberry Pi or BeagleBone Black, and serves an entirely different purpose. What I was looking for and couldn’t find was a comprehensive article that would summarize all of the pros and cons of the Raspberry Pi and the BeagleBone Black, and what each platform is best suited for. When I couldn’t find that article, I decided to write it myself.
Raspberry Pi, mini computers, Android and microcontrollers General electronics Handling LCD displays via USB UART from your computer - How to control displays from computers via serial UART communications in PythonRemote programming of mini PC like Raspberry Pi or Beaglebone Black - How to use SSH, SSHFS and VNC/RDP to remotely programm and operate an mini PC from another PC. Micro Python and pyboard Micro Python and pyboard - a Python running on a microcontroller scripts your electronics - How doeas a Python works on a microcontroller and what features pyboard board can offer us?PyBoard and MicroPython in examples - scripting electronics with Python - How to use various electronic and electric parts with PyBoard - like DC and stepper motors, I2C devices, relays and sensorsUpdating pyboard firmware for latest MicroPython features and fixes - Using analog joystics and precise PWM control for running DC motors. Raspberry Pi
Kits CNC Mill - Shapeoko Product Details IMPORTANT NOTE REGARDING SHIPPING: Mechanical Kits have a 1 week lead time, Full Kits have an estimated lead time of 4-5 weeks Shapeoko 2 is a simple, low cost, open source CNC milling machine kit that can be built over a weekend. Assembly is required before you can use it. This is version 2 of the fastest selling CNC machine in the history of the world. The machine has been under development for the last five years. 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.
About MAKE Whether your project travels in a suitcase or requires a tow hitch and trailer to move it around, get on the Road to Maker Faire Challenge — you could win $2,500 to bring your project to New York City this September for World Maker Faire! Grand PrizeOne Grand Prize Winner will receive $2,500 to bring their project to World Maker Faire New York 2013. 2nd PrizeTwo Runners-up Prize Winners will each receive 1 Maker’s Notebook, a 1-year subscription to Make: Magazine, and 2 Adult weekend passes to World Maker Faire New York 2013. Contest InstructionsTo enter in the Road to Maker Faire Challenge, you will need to submit an Entry Form with all of your project details.