Kyuki driver circuit ke last CoLd section me capacitor lge hote h jo ki charge ho jate h jb output wire ko apas me milate h jo wo capacitor discharge hote h usi ki awaj hoti h wo.
Uske liye aap sabse pahle 1000ohm ki resistance lga kr dekhe agr circuit chal jaye to thi agr nhi chala to 100ohm ki fir isi trah ohm kam kr ke lgate jao thoda time lgega but circuit thik ho jayega