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Use the calculation to wind transformers EI, UI, C-Core. If the description is wrong, please do not be offended. Please look at the numbers as the main thing. VA = (CA * 5.58) ^ 2 5.58 is constant. Turn Per Volt (N / CA) = (N / CA) Volt N has a value from 5 to 7.5, depending on the input voltage. For electricity in Thailand (220V), use the value 7.5. For electricity in other countries such as Japan, use the value 4.86. A low value, low winding, if used with high voltage will cause the transformer to overheat. Press like, share and follow to encourage making good clips that provide knowledge without hiding. Support the making of clips via PayPal 085 97952185 Main website http://www.circuitfx.com Facebook / circuitfx