About: Ibrar Ayyub

Be Careful About Peak Current A note of caution: These LEDs are comparatively expensive, so I suggest putting a small resistor (1 to 10 Ohms) in series with the cathode of the LED and measuring the peak current as inferred from the IR drop using either a scope or a peak detection probe (as described […]

An adapter to allow low capacitance probing of high frequency circuits. Overview My boss, Dave, said “Just hold the probe close to the cathode lead.” Dave had worked at Tektronix for many years, and his ability to make difficult measurements was second only to his abilities to manage a company and design clever circuits. Dave’s […]

Atmel AVR Studio 4: AVR Studio 4 is an IDE, launched by atmel for providing better programming envoinment. It can be used to program all the famous series of atmel i.e. Attiny , Atmega, Xmega . The envoivromnet is very user-friendly. Under given is the welcome screen view for the atmel avr 4 which is […]

Introduction This is a complete AVR Tutorial, including avr programming in a very basic & organized way, We will go through by following items. What is an AVR? Using Mac and Windows How AVR programming works Choosing a programmer, to burn the code. Using AVRDUDE Prerequisites This set of notes does have some prerequisites. It requires two important […]

Overview I needed several current probes when designing the deflection circuits and high voltage supply for a computer display monitor, and the lab in which I was consulting only had one current probe, which I shared with the other four engineers on the project.  We did not really have a budget for test equipment on […]

Introduction It has been said that a man with one watch knows what time it is, but a man with two watches is never sure.  The same can be said for a person who has more than one voltmeter.  In my situation, I have several voltmeters in each of two different locations a third of […]

Not too many parts. When a voltmeter is connected across the outside terminals of the output connector, its display reads out in degrees C. I’ve been fascinated by the LM335 for some time -maybe my obsession with stability finally gave way to my fascination with a circuit with intentional thermal drift. I finally bought some […]

A 128 x 64 graphic LCD is in the clear plastic box at the top. It is connected to the waveform capture and control unit in the green pencil box below the display.  Downloads AVR Studio 3.5  ASSEMBLY SOURCE for the waveform capture controller. AVR Studio 3.5  ASSEMBLY SOURCE for the control panel and LED […]

Big Dog is fantastic looking machine being created by Boston Dynamics. DARPA is funding development of Big Dog, they have also funded development of the Tree Climbing Robot. “BigDog has an on-board computer that controls locomotion, servos the legs and handles a wide variety of sensors. BigDog’s control system manages the dynamics of its behavior to keep it balanced, steer, […]

Download auto-zero assembly code This broadband probe has a small antenna (about a 15 cm length of insulated wire). Radio Frequency energy coupled to the antenna is detected and made available to drive millivolt level signals to the input of a DVM (Digital Volt Meter). Its battery powered for convenience with very low current drain […]