之前完成的電源供應器運作時頗熱。試過連聽兩個小時音樂後，電壓變得不太穩定。發覺LM3886 ＩＣ產生相當熱量，因此影響L1燈泡的穩定性。於是我改用二極子來穩定振盪，便不會受到溫度影響。After listening music for 2 hours, the voltage became not stable. I found that the power supply was hot (due to LM3886) and it affected the function of L1 lamp in stabilizing the oscillation. Therefore, I changed this part to diode so that it is not temperature dependent.
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