Rangkaian ini terdiri dari 10 buah LED yang diletakkan menjulang, disuplai oleh 9 volt IC 1A perlu dikuatkan menjadi 100 kali dan bergerak ke sinyal audio IC 1B. Tingkat sensitivitas dari rangkaian dapat diatur dengan mengubah nilai dari R4. NIlai dari C4 dapat diubah dari 220 menjadi 470nF. Setiap masukan R9 harus dihubungkan dengan pin output dari IC2.
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