power electronics
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Schottky Diode – Characteristics, Parameters and Applications A diode is one of the basic components that are commonly used in electronic circuit designs; it can be commonly found in rectifiers, clippers, clampers and many other commonly used circuits. It is a two-terminal semiconductor device that allows the current flow in only one direction, that is, from Anode to Cathode (+ to -) and blocks the current flow in the reverse direction… |
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Transformerless LED Driver Circuit for Reliable Low Cost LED Bulb Designs LED bulbs are said to be 80% more efficient than other conventional lighting options like fluorescent and incandescent bulbs. The fast adaption of LED bulbs is already noticeable around us and the global LED bulb market value has reached to around $5.4 Billion in 2018. A challenge, in designing these LED bulbs is that LED light, as we know works on DC voltage and the mains… |
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Mechanically powered Emergency Flashlight Flashlight or Torch is very useful in emergency situations like power failure. These flashlights are battery-operated, and we have to charge regularly in particular intervals. But what if you don’t have electricity and your flashlight is dead? In that situation, Mechanical chargeable Flashlights is very good option, which can be charge by rotating the lever attached to it.… |
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What is Bleeder Resistor and where it is used? Bleeder resistors are standard high value resistors which are used to discharge the capacitor in filter circuit. The discharging of the capacitors is really important because even if the power supply is OFF, a charged capacitor can give a shock to anybody. So it is really essential to add a bleeder resistor to avoid any mishaps. It also have other applications but the main… |
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Diode Clipper Circuits: Design & Demonstration As the name suggests, Clipper circuit is used to “clip” a portion of input signal without distorting the remaining part of the waveform. It is a wave shaping circuit. This can be very useful in the circuits where the input signal attains a higher value of voltage than the expected one. These circuits can be implemented in various ways according to the configuration or… |
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How to Measure Current with an Oscilloscope Measuring current is a simple task – all you need to do is hook up a multimeter to the circuit you want to measure and the meter gives you a clean value to use. Sometimes you can’t really ‘open up’ the circuit to put a multimeter in series with what you want to measure. This is solved quite simply too – you just need to measure the voltage across a known resistance in the… |
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Galvanic Isolation – Signal Isolation and Power Isolation An average household microwave oven operating at 110/220V AC can produce upto 2800V inside it, which is dangerously lethal. Besides that it also has a lower level AC voltage around 3.5V to light up the filament and a regulated DC voltage like 5V/3.3V for the digital electronics part like the display or timers to operate. Have you ever wondered… |
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New 500W-650W AC-DC Power Supplies for Medical Devices Including BF Applications XP Power released PBR500 and PBR650 series, two new ranges of AC-DC power supplies that provide BF class insulation for healthcare applications where EMC performance is a key requirement. The PBR500 and PBR650 series feature power levels up to 500W and 650W respectively and accept wide, universal input range of 80VAC – 264VAC at 47Hz to 63Hz offering a total of eight single… |
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Mains Power Supply Failure Alarm Circuit Although there are inverters and generators to immediately start the AC power supply whenever there is a power cut but sometime when there is no backup support and we have some critical machines running to perform some important task, it’s a good idea to atleast have an alarm which notify us as soon as power goes off. In this tutorial, we will learn how to make a simple… |
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Transimpedance Amplifier - Current to Voltage Converter To explain in simple words a Transimpedance amplifier is a converter circuit which converts the input current to a proportional output voltage. As we know when current flows through a resistor it creates a voltage drop across the resistor which will be proportional to the value of current and the value resistor itself. Here, assuming the value of resistor to be ideally… |
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4-20mA Current Loop Tester using Op-Amp as Voltage to Current Converter Sensors are an integral part of any measurement system as they help in converting the real world parameters into electronic signals that could be understood by machines. In an industrial environment, the commonly used type of sensors is the Analog Sensor and Digital sensors. Digital sensors communicates with 0’s and 1’s following protocols like USART, I2C, SPI etc. And… |
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Single Cell Boost Converter Circuit using Coin Cell – 5V Output Battery cells are the most commonly used energy source to power portable electronics. Be it a simple alarm clock or an IoT sensor node or a complex mobile phone everything is powered by batteries. In most cases these portable devices need to have a small form factor (package size) and hence it is powered by a single cell battery, like the popular CR2032 Lithium cell or the… |
