Did you know that there is something like Google? You can pose it a question and you can get an answer like this The simplest implementation of an Or gate consists of 2 diodes and a resistor.

Electric circuit formula is (W/V)20%+.
W=Watt V=Voltage
how many watt needs to run that equipment like 1500W
how many voltage that u can get from your electic company like 220V
than (1500/220)20%+=8.18 So u need 8 to 10 ampere circuit for this equipment.

This nutter made a functional computer out of NAND gates... It's crazy - I would like to see his schematic diagrams to try and start to fathom how it works...

ALL computers are no more than logic circuits linked together :)

Of course OP is massively confused in his use of the term "electric circuits" when meaning "logic circuits", which might have hurt his attempts at using a search engine (itself a logic engine, ironically) to find the information he is looking for.