• Nov 1, 2025 simple uninterruptible power supply design circuit diagram (555 timer IC) or transistors. H-Bridge Inverter: Made of four power transistors (e.g., NPN BJTs or N-channel MOSFETs). Switches the DC voltage across the load in alternating directions. Output Transformer: Converts low-voltage square wave to the desired AC volta By Glenda Schroeder
