I need adjustable frequencies and decibel circuit
hello everyone..
can show me the frequencies and decibel circuit that build with 555timer or other component that produce tone connected to earphone with battery 9V supply..
i gonna die thinking this circuit..
please help me..
can show me the frequencies and decibel circuit that build with 555timer or other component that produce tone connected to earphone with battery 9V supply..
i gonna die thinking this circuit..
please help me..
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