18-10-2014, 11:26 AM
Abstracts: System is based in 8051 microcontroller. Power supply gives regulated 5v DC from 230V input. 2X16 LCD is there to display parameters of system on the display. Sine to square wave converter gives square wave reference input to microcontroller from 50HZ sinewave line voltage. We have connected four devices at one input of load and four devices at another input of load. At a time only one device is active out of four devices. It is on for half cycle only. Next cycle which device to switch on depends on what frequency output we want. This can be set using four switches. We can generate output at line frequency, line frequency/2, line frequency/3 etc.