วงจรเสียงระฆัง ใช้ IC 741 [basic electronic bell by IC741]

This is a basic electronic bell circuit, it is interesting. We use a number of IC 741, it works. When you press S1 it will mimic the sound a bell,by can be fine with VR1, VR2 and VR3, to control sound as close as possible,by we set form audio oscillator generator circuit, sine wave form can change with by pressing S1. but sound is slight required to use power amplifier for boost up its.