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We usually find Negative Ground GND Negative Cold negative hot ... and do not join them they are not the same and it is also dangerous ... Look at the difference between them. I will explain electronics in a simple way with several practice parts to learn and practice at home. In this playlist I will explain everything about switching power supplies from start to finish to be able to understand them and thus be able to repair them and even design them. ------------------------------------------------------------------------------------------------------- Playlist: https://www.youtube.com/playlist?list... ------------------------------------------------------------------------------------------------------- Donations are to improve the tutorials. Paypal: https://www.paypal.com/donate/?busine... Mercadopago: https://mpago.la/1pq8AfY Thank you very much.