Industrial Ups Circuit Diagram - Can this circuit be modified as follows. 1 Power supply from 3 to 5 volts 2 The relay replaced with a sewing machine bobbin fully wound with 30 gauge magnet wire.. Uninterrupted Power Supply Circuit Diagram Types of UPS. Electrical power supply intrusions can come in a different forms like surges, voltage dips, voltage spikes and harmonics. These troubles can cause serious damage to electrical gears, mostly during. We feature 2000+ electronic circuits, circuit diagrams, electronic projects, hobby circuits and tutorials, all for FREE! Since 2008 we have been providing simple to understand educational materials on electronics for engineering students and hobbyists alike..