An AC /DC adapter refers to a device designed to convert a high mains input supply to a lower DC output.
We are all actually quite familiar with such equipment since we already use them widely in our day to day life. Take for example the adapter which powers our computer monitor, or the unit that charges your laptop battery, the device which powers your TV set-top box, or even simply your very own cell phone charger unit. All these are nothing but power adapters manufactured for stepping down the AC mains from your home electrical sockets to a modest low voltage DC level suitable for powering the intended DC appliance.
Nearly every single electronic circuit requires a separate power supply, which is often in the form of a battery or a rectified power supply. In this article we are going to discuss how to make small basic transformers which are typically applied in mains-operated power supplies, such as step down transformers Introduction This will likely … Read moreMake Step Down Transformers with Calculations
In this post we are going to construct a battery eliminator / DC variable power supply which will automatically cut-off the supply, if the current flow through the load exceeds the preset threshold level. By Girish Radhakrishanan Main Technical Features The proposed over current cut-off power supply circuit using Arduino has 16 X 2 LCD display, … Read moreOver Current Cut-off Power Supply Using Arduino
In this post we comprehensively discuss a 2 simple 12V 2 amp SMPS circuit using the IC UC2842. We study a 2 amp flyback design by evaluating various formulas, which provides the exact selection details for the transformer winding and the parts specifications. Design#1: Introduction The first design is based on the versatile IC VIPer53-E. The … Read more2 Compact 12V 2 Amp SMPS Circuit for LED Driver
This multipurpose general purpose supply generates as much as 2.5 amps from zero to 20 volts or up to 1.25 amps from 0-40 volts. Current limiting is variable within the entire range for either output options. By Trupti Patil Power Supply Main Specifications: AN IDEAL POWER SUPPLY must provide a voltage that is variable … Read more0-40V Adjustable Power Supply Circuit – Construction Tutorial
A couple of simple yet efficient 220V operated transformerless 50V adjustable solid-state power supply circuit using a single IC SR087 is discussed in the following article. The design does not depend on high value capacitors or inductors and yet is capable of delivering 100mA current to the attache load. Circuit#1: Main Features and Board Layout … Read more2 Solid-State IC Based 220V Adjustable Power Supply Circuits
The article explains the pinout functions, and datasheet of a versatile low dropout voltage regulator IC KA378R12, and also presents a circuit diagram showing how to use the IC in practical applications. A related question was asked by Mr. Jon, which inspired me to update this post. The question can be seen in the following … Read moreLow Dropout Voltage Regulator IC KA378R12C – Pinout and Working Specs