Make piano using 555 IC
Posted by Rohan on Sunday, July 06, 2014 with No comments
This circuit produces a tone according to the button being pressed. Only 1 button can be pressed at a time, that's why it is called a monophonic organ. You can change the 1k resistors to produce a more-accurate scale.Each button has a different tone , Moreover you can alter resistances to get soundsof your choice.
COMPONENTS USED :
1.555IC
2.Six1K resistances.
3.one 10K resistance
4.one 10uF Electrolytic capacitor
5.one 100nF Ceramic Capacitor
6.one 8ohm speaker
7.Six Push buttons(Tick-Tack buttons)
8.one 6-12V supply
The circuit below shows the arrangement neede for 555 piano:
STEPS :
1.Place 555 IC on BreadBoard
2.Connect pin 1 to ground.
3.Connect pin 8 and pin 4.
4.Connect pin 6 and pin 2.
5.Connect 100nF between pin 2 and ground.
6.Connect 10uF cap to pin 3 with Longer leg towards pin3.
7.Connect Shorter leg of the Cap above to one side of speaker, connect other side of speaker to ground.
8.Connect pin 8 to VCC.
9.Connect a 1k resistance between pin 7 and VCC.
10.Then connect a 10K variable resistor between pin 7 and one end of Push button, connect other end of push button to pin 6.
11.Then repeat connection of other buttons and 1K resistances as Shown in above Diagram.
(NOTE - In the circuit below i added a LED between +ve and -ve terminal of battery to indicate if the piano is on or off , it is useful in case you want to make this ckt on a PCB , LED will help in indicating if piano is on and it can be switched off when not in use to save battery. A Switch can also be placed b/w the VCC and the ckt to switch piano on and off)
COMPONENTS USED :
1.555IC
2.Six1K resistances.
3.one 10K resistance
4.one 10uF Electrolytic capacitor
5.one 100nF Ceramic Capacitor
6.one 8ohm speaker
7.Six Push buttons(Tick-Tack buttons)
8.one 6-12V supply
The circuit below shows the arrangement neede for 555 piano:
STEPS :
1.Place 555 IC on BreadBoard
2.Connect pin 1 to ground.
3.Connect pin 8 and pin 4.
4.Connect pin 6 and pin 2.
5.Connect 100nF between pin 2 and ground.
6.Connect 10uF cap to pin 3 with Longer leg towards pin3.
7.Connect Shorter leg of the Cap above to one side of speaker, connect other side of speaker to ground.
8.Connect pin 8 to VCC.
9.Connect a 1k resistance between pin 7 and VCC.
10.Then connect a 10K variable resistor between pin 7 and one end of Push button, connect other end of push button to pin 6.
11.Then repeat connection of other buttons and 1K resistances as Shown in above Diagram.
(NOTE - In the circuit below i added a LED between +ve and -ve terminal of battery to indicate if the piano is on or off , it is useful in case you want to make this ckt on a PCB , LED will help in indicating if piano is on and it can be switched off when not in use to save battery. A Switch can also be placed b/w the VCC and the ckt to switch piano on and off)
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