The STEAM Spot

Off Line-UPS Offers (100 -5000 Watts) With increased dependency on electric power for various domestic, commercial purposes and the seemingly declining capacity of power utilities in many countries, the need for additional backup power sources is on the rise. Various modules are already available to address these different needs. However, most modules are too expensive, too bulky, or too rigid in their power capacity, capability, and flexibility. The circuit described here is an off-line uninterruptible power supply. It has an expandable power stage design that can be easily modified for use with power ranges from as low as 100 W to as high as 5000 W with forced cooling. The design is based on the LM3524D, a popular industrial-grade, pulse-width-modulation (PWM) controller. This device is fully self-contained and has all of the necessary logic built-in to ensure a compact and cost-effective product. The controller offers: Complementary power drive output stage with 1...

500W 12V to 220V Inverter This is a 500W DC-to-AC inverter circuit diagram which produces an AC output at line frequency and voltage. 12VDC to 220V 50Hz inverter circuit will power 220V or 110V appliances from 12V car battery. The circuit is easy to make and is low cost. Use proper transformer. The output (in watts) is up to you by selecting different power rating transformer and power transistor rating. If you load electronic device which require 120V AC, then use transformer with 120V in output. Droid Electronics        

Introduction:                                   principle of operation of an inverter     An inverter can be taken as crude form of "UPS" obviously the main use of an inverter is only for powering common electrical appliances like light, fan etc . during power failure     As the name implies the basic function of a inverter is to invert an input D.C voltage (12DCV) into a much larger magnitude of alternating voltage (generally 110ACV or 220ACV)                            FUNDAMENTAL ELEMENT OF AN INVERTER  1 . OSCILLATOR :  an oscillator converts an input d.c voltage from a lead acid batteryinto a oscillating current or square wave (A.C) which is fed into the secondary winding of a power transformer . 2. TRANSFORMER: Here the applied oscillating voltage is stepped up per ratio of...

H OW  TO MAKE A SMALL INVERTER CIRCUIT                   Inverters are often needed at places where it is not possible to get AC supply from the Mains. An inverter circuit is used to convert the DC power to AC power. Inverters can be of two types True/pure sine wave inverters and quasi or modified inverters. These true /pure sine wave inverters are costly ,while modified or quasi inverters are inexpensive. These modified inverters produce a square wave and these are not used to power delicate electronic equipments . Here, a simple voltage driven inverter circuit using power transistors as switching devices is build, which converts 12V DC signal to single phase 220V AC. Table of Contents Principle Behind this Circuit Inverter circuit Using Transistors Circuit Diagram Components required Working Output Video 12v DC to 220v AC Converter Circuit Using Astable Multivibrator Circuit Design Exp...