About: Ibrar Ayyub

Features Wide Input Voltage Range: 4.5V to 100V Ultralow Quiescent Current and Low Ripple Burst Mode® Operation: IQ = 6μA 0.5A, 140V Power Switch Positive or Negative Output Voltage Programming with a Single Feedback Pin Programmable Frequency (100kHz to 500kHz) Synchronizable to an External Clock BIAS Pin for Higher Efficiency Programmable Undervoltage Lockout (UVLO) Thermally-Enhanced High Voltage […]

The Virtual Wallis a circuit to mimic the behaviour of the iRobot Virtual Wall/Lighthouse, provided with the robot. It produces the same infrared pattern and the robot sees it as another virtual wall, blocking its path, while vacuuming. This circuit was built mostly using SMD components to reduce its size, nearly to the size of […]

Features 4000:1 True Color PWM™ Dimming 4A, 60V Internal DMOS Switch Wide Input Voltage Range: 3V to 42V 0V to 60V Output Current Regulation with Monitor PMOS Switch Driver for PWM and Output Disconnect LED Short-Circuit Protection and SHORTLED Flag Internal Spread Spectrum Frequency Modulation Constant-Current and Constant-Voltage Regulation Input Current Limit and Monitor Adjustable […]

Table of Content: Frequency Reference Frequency Actual Subtraction and Comparator Digital Outputs Integrator Transistors Q2…Q4 Connection to Oscillator How to tune? PIC SW in the frequency counter Final test RB2 Function Is this worth to build it? Pictures are better readable locally with appropriate viewer, so we suggest download them first This PIC software combines […]

You certainly all know that you cannot trust Wikipedia completely. In our case, it’s not about the lack of credibility but more about incompleteness. It is generally respected that there are more things that belong in the area of nanotechnologies – when something needs to be done from scratch, iPod Nano or Nano-SIM card holder. […]

This post provides an example code to use PIC16F84A pins as inputs. After going through this example, you will understand how to make PIC16F84A pins as inputs and how to read their value in the code. This code is written in C language using MPLAB with HI-TECH C compiler.You can download this code from the ‘Downloads‘ […]

HOW DOES IT WORK & CIRCUIT SCHEMATIC Everybody knows the speed of the sound in the dry air is around 340 m/s. Send a short ultrasonic pulse at 40 Khz in the air, and try to listen to the echo. Of course you won’t hear anything, but with an ultrasonic sensor the back pulse can be […]

The synchronizer ensures a contact-free, optical synchronization of external photographic flashguns. The triggering of the external flash is derived from embedded flashes of a camera. It can be used for both digital and “analogous” cameras or for a remote synchronization of the actual flash units. Its use is optimal especially with digital cameras (DC), where […]

The purpose of this article is to demonstrate how you can perform serial port communication in the VBA (Visual Basic Applications – script editor included in any typical Microsoft Excel distribution) but without using the MSComm control or any other third party add-on or ActiveX. 1. Introduction The great advantage of this method, which uses […]

DoE 2016 is a known term naming stringent regulations established by DoE (department of energy USA) valid from year 2016. Among other things it brings a requirement for a standby power consumption of small adapters to be below 0.1W. In Europe we have here a limit of 0.5W for majority of small adapters, but even […]