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 […]
AC to DC Adapter
The following articles show how you can build such AC to DC adapter units by yourself by assembling a few electronics parts at home.
Traditionally such devices or power supplies used to employ transformers, with bridge rectifiers for implementing the required conversion, however the modern adapters now utilize flyback converters or SMPS based design for these units which make them very compact, light weight and handy.
In the following articles you will find a variety of DC adapter circuits using the older transformer based concepts, and also the modern switched mode versions. You will also learn regarding the capacitive power supply which neither uses transformer nor the switched mode technology rather depends on a non-isolated capacitive control method for executing the required step down application.
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, […]
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 […]
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 […]
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 […]
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 […]