dikarenakan kurang singkron pada pendeteksian simpul 0 disaat awal dan akhir periode sudut fasa, dimana hal ini disebabkan juga oleh kondisi tidak ideal dari rangkaian ZCD dan TRIAC.
due to lack of detection on node 0 singkron during the beginning and end of the phase angle, the period in which it is caused also by conditions not ideal from the ZCD and TRIAC circuits.
because less synchronous detection node 0 when the start and end period phase angle, where it is caused also by the conditions are not ideal from ZCD circuit and TRIAC.