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