Building Your Own Electronic Organ Circuit

Music played significant role in our lives as long as we can remember.

And guess what as we discover new technologies still it is growing

A good example of this is found in electronic instruments which is particular a electronic organs.

It has completely changed how we compose and enjoy music.

The Technology Behind Electronic Organs:

Even though fancy organs are expensive and tricky to build make a simple one yourself with this simple circuit.

This circuit is easier to use than others because it does not require a complicated setup.

• One part tone generator makes the simple musical tones.
• Another part vibrato unit can add a little shake to the sound making it more interesting option.
• One can touch a probe to choose different notes.
• The sound changes depending on a special chain of parts.
• The whole circuit uses very little power so one can run it with a regular battery.

Circuit Working:

Parts List:

It is important to remember that the probe cannot be made of metal but construction can take any shape.

Users can experiment with different probes to find one that produces a clear pleasant tone quickly.

The circuit gets powered by a PP3 battery and uses very little current.

A unijunction transistor of type 2N2646, C5, R5, VR1 and tone resistors make up the tone generator.

A probe that can choose the right notes receives the unijunctions emitter.

The whole resistance in that chain decides a notes frequency and VR1 is programmed to change the entire range.

The volume control which need to be connected to an external amplifier receives the oscillators output through C6.

Although the circuit will generate the right sounds it could not have any character or charm.


The frequency at which the vibrato unit operates is between 10 and 30 Hz and it only slightly changes the output level at this frequency.

To add uniqueness this step can be constructed independently and combined with the note.

It is highly advised to fit this step.

The oscillator is a phase shift type and the output is sent straight to the unijunctions emitter from the collector through C4.

When the probe is not picking a note the low frequency note is not heard.

Although phase shift oscillators are sometimes be challenging the issue usually disappears with a little adjustment to the value of R3.

Formula:

According to the following formula the notes frequency (fnote) is calculated by the chains total resistance (Rtotal).

f_note = 1 / (2 * π * R_total * C5)

where,

• The frequency at which a musical note is produced by the circuit is known as Fnote.
• The circuits entire resistance which affects frequency is represented by Rtotal.
• The circuits connected capacitance value is expressed in farads is represented by C5.
• Pi indicated by the symbol π is roughly 3.14159 and is used in calculating pertaining to circles and regular functions.

Note:

Using the circuits total resistance and capacitance values the formula shows how to calculate the frequency of a musical note produced by an electrical circuit.

It is required for building and adjusting circuits that produce certain musical tones or frequencies.

When necessary tuning to other notes or frequencies is made possible by adjustments to C5 and Rtotal.

Conclusion:

Making a unique electronic organ is an exciting and best in educational project.

It offers an excellent chance to study the basics of music theory so that people can understand how electronic instruments operate.

With the development of electronic organs and the availability of modern technology life has never been so easier.

The technology and design of electronic organs are discussed in detail in this article which also encourages readers to study more about this fascinating subject.

Let the imagination go wild and begin by creating a DIY electronic organ that can create lovely music in a unique way.

References:

Electric organ

Electric Organs and Their Control