?? 2600 hertz single tone generator schematic.txt
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2600 Hertz Single Tone Generator Schematic-------------------------------------------Parts: 555 timer I.C. 8 ohm speaker | 9 volt battery & connector --+-- = connection Pushbutton switch | 5k potentiometer 1k ohm resistor | 4.7 micro-farad capacitor ----- = no connection 3.3 micro-farad capacitor | +----+-------------------------------+ | | | | V 1k | | /\/\/-+-/\/\/-+---------------+ | +--------+ 5k | | | | | ---|--------|-------|--------|--- | |pshbtn | o | 8 7 6 5 | | |switch -+ | | | | | o ||| 5 5 5 | | | | ||| TIMER | | | | | | | | (+)-----+ | 1 2 3 4 | | |9 volts ---|--------|-------|--------|--- | | (-)--------------+ | | | | | | +-----------------------+ | | 3.3uF | | | +--->|--------------------+----------+ | | 4.7uF \_/ | --- | |(+) | | ______ | +----| 8ohm |----+ /__SPKR__\To calibrate:Play next to a pure 2600hz source and adjust the 5k potentiometer until the twosounds are the same. As you get closer you will hear a beat tone form and getslower and slower. When it stops, the two frequencies are equal. This takes alittle practice.?? 快捷鍵說明
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