Simple Toy Organ Circuit using IC 555

This is small and Simple Toy Organ Circuit using IC 555.

It make sound like music when we press a switch.

We used IC 555 in astable mode.

When press the different switch it give different sound.

This circuit is easy to make and good for beginner.

With no need of many parts it is a fun project to learn basic electronics.

Circuit Working:

Parts List:

555 IC make square wave signal and it work like astable multivibrator.

R1, VR1 (variable resistor) and C1 decide how fast signal goes.

When button is press then VR1 resistance changes.

This change frequency make different music sounds.

How circuit work:

555 IC1 main part is to give continuous square wave.

R1, VR1 and C1 set frequency.

VR1 connect with switches and resistors R2 to R6.

Press switch, add resistor to ground, change VR1 resistance and change the frequency.

C1 control charge and discharge time and set signal speed.

C2 blocks DC and only AC goes to speaker.

Speaker make sound from signal.

Press switch and make different tone sound.

Change resistor and capacitor to get new tones.

Formulas:

To make square wave tones 555 IC in astable mode is used in toy organ circuits.

Important Formula:

Frequency (f):

f = 1.44 / ((R1 + 2 × R2) × C)

• R1, R2 are the resistors
• C is the capacitor

These parts connect to 555 IC.

This formula help build toy organ circuit with 555 IC.

It tell how fast is the frequency and how the square wave comes out.

This wave goes to speaker and make music sounds.

We can change pitch and tone by changing R1, R2 or C values.

How to Build:

To build a Simple Toy Organ Circuit using IC 555 follow the below mentioned steps for connections:

• Pin 1 of 555 connects to ground.
• Pin 2 connects to pin 6.
• Pin 3 connects to ground through C2 and 8 ohm speaker.
• Pin 4 connects to +6V supply.
• Pin 6 connects to lower legs with common side of all 6 micro switches.
• Pin 7 connects to one side of preset P1 and one side of R1 and other side of R1 connects to +6V.
• Pin 8 connects to +6V supply.
• R2 to R6 connects in series with upper legs of 6 switches.
• C1 connects from pin 2 and 6 to ground.

Safety Tips:

• Check voltage is correct for circuit.
• Use right type of components.
• Do not touch hot parts and avoid burns.
• Kids must build this circuit with adult help and should follow safety first.

Conclusion:

Making Simple Toy Organ Circuit using IC 555 is easy and fun.

Good way to learn electronics and sound control.

Change resistors to make different sounds.

We can learn more by trying different settings.

References:

Datasheet IC 555