About: Ibrar Ayyub

The temperature in my office at work varies quite a bit depending on the time of day, season, and the whims of the other people I share the floor with. When I’m sitting at my desk shaking uncontrollably or sweating profusely it would be nice to know if it’s due to the temperature or just […]

I was in need of a function generator to produce audio signals for testing effects / amplifiers; as well as TTL clock signals for digital circuits. As function generators generally cost about £200 new, I decided that I would instead build one myself. This project uses the XR-2206 integrated circuit to generate the waveform. It […]

(Phys.org) —Graphene has become an all-purpose wonder material, spurring armies of researchers to explore new possibilities for this two-dimensional lattice of pure carbon. But new research at MIT has found additional potential for the material by uncovering unexpected features that show up under some extreme conditions—features that could render graphene suitable for exotic uses such as quantum computing.

The reason for this project was to solve a problem I have. I sometimes do several days of hiking/backpacking in the wild and I always bring a smartphone with GPS and maybe other electronics. They need electricity and I have used spare batteries and solar chargers to keep them running. The sun in Sweden is […]

Creating a solder paste stencil for a toaster reflow oven or hot plate is simple when you have access to a laser cutter.  I used the Laser Cutter at my local TechShop to create this and other PCB stencils. This Instructable assumes you have created a PCB and are able to generate the Gerber Files […]

Combining Arduino and other shield modules, we make a mobile phone named Arduino Phone. Meanwhile, we printed a shell for it with the 3D printer. Although it’s not such fine as you think, even a little bit clunky, it’s still very cool. That is the point this is a cell phone made by ourselves. While, […]

(Phys.org) —A colloidal suspension is a mixture in which microscopic particles of one substance are dispersed in another and because of its properties does not “settle” in the way that one might expect a stirred mixture of sand in water to do; nor do the particles dissolve in the fluid as one might expect grains of salt to dissolve in water. Colloidal suspensions and the related gels (solid colloidal systems) are of interest because many of them have fundamentally useful properties.

Introduction: A voltage step-up is a circuit that increases the voltage. It can be AC/AC, AC/DC, DC/AC or DC/DC. This voltage step-up is a DC/DC adjustable voltage regulator. Usually a voltage regulator is fed by a higher input than output voltage, for example 9V IN to 5V OUT. This circuit will take a low voltage […]

An international collaboration including Russian physicists from Moscow, Chernogolovka and Yekaterinburg have studied one member of the recently discovered family of superconductors based on iron compounds and find this exotic form of superconductivity to have complex, multi-gap character. A fact of principal importance for understanding the mechanisms of superconductivity is that the superconducting gap width never becomes zero around the constant-energy Fermi surface.

Yesterday I saw the “The Practical Meter” on Kickstarter – a small unit that is placed inline with the USB when charging your phone and shows the actual charging power (in watts) on a row of LEDs. I wanted to have a go at it as well so I did the following last evening. First […]