A step down transformer is a device which reduces a higher AC potential to a lower AC potential as per its winding ratio and specifications. In this article we are […]
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.
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.
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 […]
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 […]
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 […]
Three simple yet efficient 220V IC based solid state transformerless adjustable solid-state power supply circuits are discussed here. The first one works using a single IC SR087. The design does […]
The article explains the pinout functions, and datasheet of a versatile low dropout (LDO) voltage regulator IC KA378R12, and also presents a circuit diagram showing how to use the IC […]