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Home » Jet Engine Sound Generator Circuit using IC HT2844P 

Jet Engine Sound Generator Circuit using IC HT2844P 

Last updated on 8 August 2025 by Admin-Lavi Leave a Comment

Jet Engine Sound Generator Circuit using IC HT2844P is fun and learning project.

It makes jet engine sound using simple parts.

It uses IC HT2844P sound chip to make real jet noise which is good for model fans, school work or DIY fun.

Circuit needs 3V power and keeps under 3.3V or else circuit may break.

Circuit Working:

Jet Engine Sound Generator Circuit Diagram using IC HT2844P 

Parts List:

Component TypeSpecificationQuantity
Resistors (All resistors are 1/4 watt unless specified)
220Ω1
470Ω1
330k1
Preset 220k1
Capacitors
Electrolytic Capacitor 1µF 25V1
Semiconductors
IC HT2844P1
Transistor 2N22221
LED Any 5mm 20mA1
Speaker 8Ω 200mW1
Push Buttons4
Battery 3V1

This circuit uses HT2844P chip to make jet engine sound.

It runs on 3V from 2 AA batteries.

VR1 and R3 control sound pitch and speed.

When ON chip makes jet sound from 8 ohm speaker.

Pins 12, 13, 14, 15 give different sounds when pressed to ground.

Q1 transistor makes sound louder for speaker.

R1 and R2 keep parts safe by controlling current.

Formulas with Calculations:

Below are the formulas with calculations for Simple Jet Engine Sound Generator Circuit using IC HT2844P:

Current through R2 (I_R2):

I_R2 = (V_CC – V_BE) / R2

= (3V – 0.7V) / 470Ω

= 4.9mA

Power in R2 (P_R2):

P_R2 = I_R2² × R2

= (4.9mA)² × 470Ω

= 11.3mW

How to Build:

To build a Jet Engine Sound Generator Circuit using IC HT2844P following steps are required to follow for connections and assembling:

  • Collect all parts from circuit diagram.
  • Connect pin 2 of IC1 HT2844P to +3V battery.
  • Put capacitor C1 across power lines of supply rails.
  • One side of 8Ω speaker goes to + side of C1 and other side go to collector of Q1.
  • Pin 6 of IC1 goes to base of Q1 through R2 and emitter of Q1 goes to GND.
  • Pin 7 of IC1 connect to GND.
  • Pin 10 of IC1 goes to VR1 through R3 and other side of VR1 go to pin 11.
  • Pins 12, 13, 14, 15 go to push buttons S1 to S4 and other side of buttons to GND.
  • Pin 16 of IC1 goes to GND through R1 and LED1.
  • +3V from battery goes to pin 2 of IC1 and negative side go to GND.

Conclusion:

This Jet Engine Sound Generator Circuit using IC HT2844P is fun and simple project.

It shows how sound chip and transistor work to make cool jet engine noise.

References:

How can I build a very small jet engine with some basic parts?

Filed Under: Audio Circuits

About Admin-Lavi

Lavi is a B.Tech electronics engineer with a passion for designing new electronic circuits. Do you have questions regarding the circuit diagrams presented on this blog? Feel free to comment and solve your queries with quick replies

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