i want to make a small invertor that converts 12 volt dc to 220 v ac at 50 hz i am facing problems some people are telling me that i should have a heat sink with my transformer if i want to run any appliance!!!!! also i am facing current problems that need enough current to run the transformer!!!!! need some help that should i have a heat sink and if i should than hoiw can i built it and what type of transformer should i get for it the circuit i am making is quite simple and based on the schematic on this following link
**broken link removed**
**broken link removed**