About: Ibrar Ayyub

iPod touch Features It’s easy to think of the iPod touch as a stripped-down version of the iPhone instead of a souped-up iPod. The iPod touch and iPhone look similar, featuring the same wide touch screen with a sleek black border and single home button. The iPod touch is a little smaller and weighs a […]

Introduction We have created a real-time, multithreaded, preemptive operating system called kaOS for the Atmel Mega32 microcontroller, which loads and executes programs from a Secure Digital or MMC card.We wrote this OS and created the SD/MMC card reader as a final project for Cornell’s ECE 476 class taught by Professor Bruce Land.  Our reason for […]

In the last weeks I followed an idea to measure current without the need to cut the wires or even open a pcb trace. The solution i came up with is a hall effect based measurement. I wrote some more about it in an article here: http://avrs-at-leipzig.de/dokuwiki/en/prokekte/fluxprobe If you do not like to open the full […]

Introduction and Motivations: For our final project, we designed and built (and exhaustively tested) an RFID-based proximity security system for use with Cornell Identification cards, which have been RFID-embedded since fall of 2003. The idea for this project was sort of spawned from our general interest in RFID technologies and the near-simultaneous occurance of Lab […]

Types of Voice Mail There are several types of voice mail systems available. Such systems are designed to function differently based on who’s using them and where, what equipment and software is used, and who’s providing the phone message services. In general, two major systems include ones based on PC technology and proprietary systems using […]

Usually you use eagle to design your printed circuit boards (PCBs) only in 2 dimensions (when not considering the layers as 3rd layer). This gives you some headaches for narrow space designs like in small cases. The common solution until now is to export your board with eagleUp and assemble it with a case in […]

A typical 3 ½ or 4 ½ multimeter can measure voltage in the low mV range and current in the low mA range. Voltage measurement in the µV range and current measurement in the nA range are typically only available in the more expensive lab bench multimeters. In this post, I will show you a […]

Introduction Our project consists of making a reflow soldering device using a normal toaster oven with a graphical LCD display for control and GUI. Soldering is an important and difficult task for custom printed circuit board design especially for integrated circuits that come as chip packages that are impossible to solder by hand. This is […]

Adding Channels In the early 1950s, cable systems began experimenting with ways to use microwave transmitting and receiving towers to capture the signals from distant stations. In some cases, this made television available to people who lived outside the range of standard broadcasts. In other cases, especially in the northeastern United States, it meant that […]

Here is what… I love camping – which means that in the summer i find time to go camp somewhere with my friends, usually in the middle of nowhere, get a fire going, grill sausages and play the guitar. But when the night falls, we need light. Full moon cannot be considered as a sufficient […]