Equivalent series resistor (ESR) in electrolytic capacitor is an interesting topic. Electrolytic capacitors can be found in many circuits in a circuit board but in today’s article I’m going to...

The machine was donated to me about two months ago because the customer thought it was too expensive to be repaired so he went and bought a new machine instead. I was planning to dismantle the machine...

              A customer called me about a device that he owns. He explained that during the night he woke up to a sound of a machine working which he realized later...

In my last article you have learned about the functions of the electrolytic and non-polarity capacitor (connected parallel) in the DC output line of a switch mode power supply (SMPS). In today’s article I will show you...

            We found while desoldering, some SMD component is having solder joint underneath that  it is difficult to remove the component using soldering Iron. So this I made trick to make hot...

It is my digital meter that was purchased about a year ago, that refused to power on, I guess the power switch is faulty. So I decided to repair it. Open it up and this is the...

Repairing Switch Mode Power Supplies (SMPS) can be much fun, interesting but sometimes you may get frustrated too if it can’t be repaired. There are simple and complex designs of SMPS in the market. Problems of SMPS...

I found few dead LED Bulbs in my Junk Box I have not tested because of busy schedule. Bulb’s domes Opened for visual inspection. All of them are of 7W. Visually tested everything seems fine and there...