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Musical chime generator (UA741)

2016-10-24 07:06  
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This article describes the Musical chime generator (UA741). The principle is very simple, very practical. The circuit components can help you understand better grasp this principle. For example, in this circuit, you can go to find and buy these components: UA741.

This is a musical generator that uses bandpass filter circuit with ua741 op-amp as act converts a sound signal in multiple feedback patterns. When connected the voltage input from a rhythm generator with a short pulse , makes it ring in natural resonance frequency. As the output oscillations vanish suddenly and resemble percussion or strum sounds naturally.

The higher the Q the longer the decay time constant. The VR1 is used to adjusts a Q value. The fo is 1/(185 x 1000 x C). The high frequency resonances resemble chimes, lower frequencies sound like calves or bongos. Several circuits, all with different tuning, driven by pluses from a rhythm generator can produce an interesting pattern of sounds.

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