I don't know either !
avr is high speed cmpar to 8051.in 8051 there are less number of instructions
AVR means Automatic Voltage Regulator. It automatically maintains a constant voltage level. AVR may be a separate device or a part of powet supply.
It depends on the application, and on the implementation of the UPS. Some UPS devices function as an AVR by boosting the output voltage when the input voltage sags. A UPS will also help you during a complete power outage, which an AVR will not. A UPS however has batteries which need to be periodically replaced. An AVR does not, which means less maintenance.
The difference is base on the requirement of their0 application.
Pull ups are awesome and stuff
avr would be cheaper but normally provides a "sawtooth" type wave instead of a pure sine wave. AVR was made for computer equipment that is less sensitive than home theater equipment where a "dirty" wave will create artifacts and shadows as well as have a noise effect on audio equipment. In short if you can afford it get a pure sine wave UPS, but if not AVR will be better than nothing.
UPS Ground is the most cost efficient of the two but standard is significantly faster
ups ground are trucks and deliver faster and cheaper if its close by and ups express delivers the same but Saturday and Sunday
The difference is in sine wave generation algorithm. In HI freq - it is 30kHz signal, modulated by 50Hz.
constructed on a single chip is called micro processor constructed on a single board is called micro controller
The Main difference between a Switched Mode Power Supply and an Uninteruptable Power Supply is the function. SMPS are like a conditioner of electricity supply for a building, house, etc. UPS are the emergency backup power supply for vital computer based systems
avr microcontroller can be burnt by using a burner with variety of softwares like AVR BURN O MAT....