xc = 1/(2**f*c); //1/2pi*f*c) Donated by Rixtronix LAB, Support us by subscribing, thanks Please become our partner and sponsor, contact us... Electronic and vitamin shop Engineer helps engineer, please visit :) LM324 Dual Op Amp 5Pcs SN74HC165 DIP16 5Pcs 16 Melody Bell Kit Module 1Pc BF494 HF FM FREQUENCY TRANSISTOR TO-92 5Pcs Safety-Correction Capacitor Yellow 1 nF 5Pcs 2Pcs 555 Timer Chip DIP Adjustable 555 Timer Module 1 Pc Popular Timer Chip 555 DIP8 5Pcs NE555 Doorbell Kit-DIY 1Pc CR2 Blue Lithium Battery 3V 800mAH 1Pc h
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