- Tone Generator -
The 555 Timer
The 555 timer chip is an integrated circuit which is used to create a vibrating
It can be operated with a 5 volt power supply or with a 9v battery, and can be made to produce a wide
range of frequencies. The frequency it generates is inversely proportional
to the resistance and capacitance placed in the circuit.
Tone generator circuit
A circuit diagram for a typical tone generator is shown above.
Construct your tone generator on a breadboard.
If you need more detail, you can look at a breadboard
Attach a headphone jack where speaker leads are
indicated, so you can listen to the tone which this circuit produces.
The heart of the tone generator is an integrated circuit chip; the 555 timer.
Other resistors and capacitors are need to control the frequency of vibrations
produced. The list of parts suggests five volts, so
the LVPS (set at 5 volts) will work well.
Test your Tone Generator by attaching earphones to hear the tone it produces.
Now measure its frequency with an oscilloscope
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