This post talk about how to make small and easy Electronic Organ Circuit using Transistors.
First, it make sound like real organ, so sound is nice and fun, then we have used transistor and transistor help make sound and give power to speaker.
Also, this circuit is small, but it plays good music and is good for learning, for making DIY project and we can learn how music and electronic work together.
Technology Inside Electronic Organ:
Firstly, big organs cost lot money and hard to build but with this small circuit we can make easily at home.
Moreover, the circuit is simple and there is no need for hard setup, in which one part make tone that is the music sound and other part is vibrato it make little wave in sound which is more nice to hear.
In addition, we can touch probe to pick note we want to play.
Finally, sound changes because of special parts in line and it does not uses much power so normal battery is enough to run it.
Circuit Working:
Parts List:
| Components | Values | Quantity |
|---|---|---|
| Resistors (All resistors are 1/4 watt) | 10k | 1 |
| 4.7k | 1 | |
| 39Ω | 1 | |
| 33k | 2 | |
| 1.8M | 1 | |
| 2k Preset | 1 | |
| 10k Preset | 1 | |
| Capacitors | Electrolytic 50µF 25V | 1 |
| Ceramic 0.1µF | 2 | |
| Ceramic 3000pF | 1 | |
| Ceramic 0.05µF | 3 | |
| Semiconductors | Transistor 2N2926 | 1 |
| UJT 2N2646 | 1 | |
| Switch On Off | 2 |
Above all, remember important thing, probe should not be metal but we can make it of any shape.
Firstly, we can try many types of probe to see which one give nice and clear sound fast.
Next, the circuit uses a PP3 battery and takes very small current, the tone generator consists of a 2N2646 unijunction transistor, C5, R5, VR, and tone resistors.
Then, probe touch the unijunctions emitter to pick right note and whole resistance in that line decide what note we hear.
After that, VR1 changes full note range and volume control take sound from oscillator through C6 and send to external speaker or amplifier.
However, this circuit make good sound but maybe not have much feel or charm.
In addition, vibrato unit work between 10 to 30 Hz it only change sound little bit and make it shake soft, but we can build vibrato part separate and join with tone and this give special effect, as it good idea to add this vibrato part.
Furthermore, oscillator is phase shift type its output connects to unijunctions emitter through C4 from collector and if probe does not touch the note we wont hear a low sound.
Finally, sometimes phase shift oscillator is little tricky but small change in R3 value can fix problem easily.
Formula:
Below formula show how to find music note frequency fnote using total resistance Rtotal:
fnote = 1 / (2 * π * Rtotal * C5)
where:
- Fnote is how fast the note sound the note frequency.
- Rtotal is total resistance in the circuit that affect the note.
- C5 is capacitor value in farads.
- around 3.14159 π
(pi) appears in many circle and wave calculations.
Note:
Also, the above formula help us find what note will play by using resistance and capacitor values, as it is useful when we build or fix circuit to get right music note or sound.
In addition, we can also change values to tune other notes if needed.de possible by adjustments to C5 and Rtotal.
Advantage of Electronic Organ Circuit:
- Firstly, Electronic Organ Circuit using Transistors is very cheap, so we can easily build it at home.
- Also, it is simple design, so beginners can understand it very fast.
- Moreover, it help us learn about electronics and music together in easy way.
- In addition, it use very less power, so battery last long time.
- Finally, it is fun DIY project, so we can enjoy making and playing music in our own style.
Conclusion:
To conclude, making our own electronic organ is fun and great for learning, as it help us understand basics of music and how electronic music tools work.
Moreover, with new techniques and easy parts building electronic organ circuit is more simple than before.
Therefore, this article for Electronic Organ Circuit using Transistors talk about how electronic organ works and give idea to learn more.
Finally, we can use our imagination and start DIY organ project and make sweet music in our own special way!
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