About: Ibrar Ayyub

This text describes how to build my PIC16F84 based game system, before you start you should read through the whole text one time. Note that many components are sensitive to too much heat and will get damaged if you heat them too much when soldering. The drawn placement images show components to mount in each […]

LUX Meter project has been design to measure the illumination.  Illumination is luminous flux falling on surface area of photo diode.  This illumination converted to corresponding voltage using Op-Amp circuit. Specifications Supply 9 VDC PP3 Battery @ 20 mA  Onboard Photo Diode  Onboard preset for calibration  Range selection via jumper 10mV/LUX, 1mV/LUX, 0.1mV/LUX  Interfacing is […]

PC Keyboard Theory The IBM keyboard you most probably have sitting in front of you, sends scan codes to your computer. The scan codes tell your Keyboard Bios, what keys you have pressed or released. Take for example the ‘A’ Key. The ‘A’ key has a scan code of 1C (hex). When you press the […]

Pulsing Hubby Detector This project uses an RF receiver module to trigger a pulsing LED Heart when the transmitter comes within range. I made this for my fiance for Valentine’s Day this year. I have yet to fully test the range, as I haven’t actually taken the transmitter out of our apartment building since I […]

This page describes a PIC16F84-based video game system I made and first published back in the beginning of 1998. Now, beginning of 2007, nine years later I’ve updated the layout of the PCB and also updated the source code to also be able to run on a PIC16F628A as Microchip is phasing out the 16F84 […]

This was a project begun last winter in the hopes of having an array of thermocouples to monitor my old woodstove when operating it. Well, I never got around to finishing it, but I have a fancy new woodstove as of this fall, and I would love to monitor its temperature curves likewise! This BoosterPack […]

This month’s patent caught my eye for a number of reasons. First, it is a nice follow-on to my article last month, since the invention is surprisingly simple and superficially straightforward (but as I said then, as long as it’s new and inventive then it satisfies the requirements for patentability). This also makes the invention […]

Background Most multimeters can measure frequency, but they are not sensitive and the max frequency is not always so high. The same problem can be found with older frequency counters. This project will describe a prescaler which will work up to 2.5GHz and with very high input sensitivity. The prescaler will divide the input frequency […]

This is my first post Related to Projects and today i will describe ‘Propeller Display’ project. Me and my friend Rushi, we both made ‘Propeller Display’ project during our under-graduation. Below is the photo of the project. Project uses Microchip PIC16F84A Microcontroller. Below is the brief specification for same. 18-Pin, 8-bit microcontroller Operating Speed – […]

Classic AC 230 V Timer project can be used in all application requiring a timer of up-to 3 Minutes to operate or control any AC mains load of up-to 200 Watts.  This project is based on the Classic 555 Timer IC, triggering a TRIAC.  Input and Output is Optically Isolated. Specifications Supply input 12 VDC […]