This is a 1000 VA UPS transformer project which is a step down transformer converts 220 volt AC into 12 Volt AC. You can built your own transformer after watching this video. This is a complete tutorial of practical transformer design and calculation.
Primary wire 20 SWG Copper
Secondary wire 10 SWG Copper
Input 220 volt
Output 12 volt plus 12 volt Center tapped.
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