Ultrasonic Smart Automatic ON/OFF Switch Circuit

In this article we are going to build a smart automatic ON/OFF switch using Arduino, which can turn on or off gadgets automatically by sensing the presence of human nearby through the concept of ultrasonic. We are going to use ultrasonic module and Arduino to sense the presence of human which activates the gadgets such … Read moreUltrasonic Smart Automatic ON/OFF Switch Circuit

How to Select MOV – Explained with a Practical Design

MOVs or metal oxide varistors are devices designed for controlling mains switch ON surges in electrical and electronic circuits. Selecting an MOV for a particular electronic circuit might require some consideration and calculation, let’s learn the procedures here. What are MOVs Metal oxide varistors or simply varistors are non-linear surge suppressor devices which are used … Read moreHow to Select MOV – Explained with a Practical Design

Mini Welding Machine Circuit for Small Welding Jobs

A small transformerless welding machine circuit can be built using a few high voltage, high value capacitors and a rectifier diode, the following article explains more on it. The idea was requested by Mr. Tun. In one of my earlier posts we came across a full fledged 100 amp SMPS welding inverter circuit for working … Read moreMini Welding Machine Circuit for Small Welding Jobs

Push Button Fan Regulator Circuit with Display

A very interesting push button operated fan regulator circuit with LED display is explained in the following article, which can be built and installed at home for the suggested purpose. The idea was requested by Mr. Sriram KP. The Design Normally all fan regulators whether it’s a mechanical or electronic employ a rotary kind of … Read morePush Button Fan Regulator Circuit with Display

Automatic Voltage Regulator (AVR) Circuit

An automatic voltage regulator circuit is quite well used where Voltage supply is only 120VAC. Many gadgets can operate good at 220V Ac that is why Voltage regulation is needed. By: Mehran Manzoor For this matter an appropriate voltage Regulator circuit is designed which can operate up to capacity of 1KW and gives Variable voltage … Read moreAutomatic Voltage Regulator (AVR) Circuit

Do NOT follow this link or you will be banned from the site!