About: Ibrar Ayyub

description This is my electronic codelock to use with an outdoor gate. The lock itself is implemented in software. It operates a relay (for example to open a door) for a few seconds if someone enters the valid code. The secret code can be changed any time after entering the current code. Note that in […]

Open electrical doors with your secret code only! Here are the technical specifications: Up to two keypads may be connected to drive both relay outputs. Professional, outdoor or other keypads may be used. Relay outputs are configurable: output voltage +6 to +24VDC (from power input) or simple switch emulation. The small LCD is optional, and […]

Programming microcontrollers isn’t hard. Building a programmer makes a great first electronics project. The goal of this instructable is to explain the simple ‘in circuit serial programming’ method used with Microchip PICs. Step 1: Why ICSP? Programming a big DIP (through hole) chip is easy. Pop it into a socketed programmer, burn, and return to […]

You can add this circuit to all sorts of projects that require on-off control. Our design allows up to 4 touch sensors using a PIC12F629. The output of each touch sensor is active LOW and this can be connected to an additional circuit to control a LED, motor or relay etc. The photo of the […]

This project will improve the output of your solar panel by about 40%. It uses a motor and gearbox from a 3.6v power screwdriver, however a number of different voltage motors can be used. The project has its own 6v power-supply made from five 1.2v NiCad cells and a charging circuit using a separate 3v […]

We have seen many projects using a set of LEDs to produce words “in the air,” but none have the clever feature we have included. Most of the projects are “shaken in the air” and produce messages that are “all over the place.” But if the words are jumping they are difficult to read. Our […]

This project is an extension of a number of musical projects (Happy Birthday and It’s a Small World) and puts 11 melodies into a single design. It’s called EVOLUTION. From the previous projects we learnt a lot about producing a tune. The first thing we learnt: it takes a lot of memory. Each note needs […]

This project has been developed due to a request from Mr Moshweunyane ([email protected]). He asked for a circuit that would count up when someone entered a lift and count down when someone exited, using two infra-red sensors. All we had to do was take the 2-digit up/down counter and add two optical sensors. These sensors […]

Introduction This project implements a real-time audio spectrum analyser using a PIC18F4550 8-bit microcontroller. The spectrum frequency analysis is performed by a highly optimised 16-bit Fast Fourier Transformation (FFT) routine coded entirely in C. The output from the FFT is displayed using a 128×64 graphical LCD to allow a real-time view of an audio signal. […]

As explained earlier, a seven segment interfaced with PIC uses almost an entire port (minimum 7 pins) to display a value. But a real time application, like watch, calculator etc., usually requires at least 3-4 seven segments. In such a case it is not advisable to use a port of the controller for each seven […]