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I am building an stereo audio amp d class with a TDA2050 amplifier but it needs an 1khz generator with 15V to work so i was thinking if ne555e can work for this job
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Yes a 555 timer would work great because it supports up to 16v supply voltage just make sure yu get the dutycycle right
No, he'll need a sinusoidal signal for testing a class-D amplifier.