Tsukure Studio Voice Modulator

In this project, we are going to make a Voice Modulator Circuit. This is a fun project, mainly designed for changing or altering the voice. Generally, when we speak in a MIC we hear same voice. But in this project when we speak in MIC, we will hear a little bit different voice something like a robot is speaking. This can be used for doing prank or fun with your friends or can be used as a voice of your Robot.

This Voice Modulator Circuit is made by using LM358 op-amp and LM386 Audio Amplifier IC. User can use 3 volts to 9 volts to drive this circuit.

In this circuit we have changed voice by using band-pass filter circuit which is made by using op-amp IC and a R10 pot is used for change the gain of the MIC preamp circuit. IC LM386 is used for amplifying the voice modulator signal. At the output, we have two choices for listening the modulated voice: speaker and 3.5 mm jack for headphone. Pot R5 is used for volume control. 

Let's Get Started!

Below you will find a list of bits to gather before hand, followed by a detailed schematic. Using a breadboard lay out the components and connect them together as shown. Alternatively you can purchase this module from our shop and simply solder the components in the places indicated on the quality assured printed circuit boards provided.

What You Need...

7 104 (100nF / 0.1uF) Capacitor (Ceramic)
1 472 (4700pF / 4.7nF / 0.0047uF) Capacitor (Ceramic)
2 100uF Capacitor (Polarized)
3 10uF Capacitor (Polarized)
2 220uF Capacitor (Polarized)
2 3.5mm Audio Jack (PCB - Sqr) Connector (Female)
1 PCB Mount 2-Pin Screw Terminal Block Connector (Other)
1 LM358P Integrated Circuit (IC)
1 LM386N Integrated Circuit (IC)
1 3mm Blue (Clear) LED
1 1 Watt / 8 Ohm Full Range (2.8 cm) Loudspeaker
1 Tsukure Studio - Voice Modulator PCB
3 100K
[ Brown, Black, Black, Orange ]
Resistor (0.25 Watt)
2 10K
[ Brown, Black, Black, Red ]
Resistor (0.25 Watt)
2 10R
[ Brown, Black, Black, Gold ]
Resistor (0.25 Watt)
1 15K
[ Brown, Green, Black, Red ]
Resistor (0.25 Watt)
1 1K
[ Brown, Black, Black, Brown ]
Resistor (0.25 Watt)
1 22K
[ Red, Red, Black, Red ]
Resistor (0.25 Watt)
1 47K
[ Yellow, Violet, Black, Red ]
Resistor (0.25 Watt)
1 68K
[ Blue, Gray, Black, Red ]
Resistor (0.25 Watt)
1 4K7 Resistor (Potentiometer / Variable)
2 50K Resistor (Potentiometer / Variable)
1 On/Off Rocker Switch (3A/250V) - Small Rectangle Switch

NB: Any resistor colour codes specified relate to 5 band resistor codes, the 5th band has not been shown intentionally. The 5th band indicates the resistor tolerence, we use only the highest tolerence resistors in our products.

Take a Closer Look!

Let's Get Building!

We to build, so let's get to it! Gather your components as specified in the components list above, or simply order one of our project packs and tip the contents out onto your table or desk.

Solder station warmed up! Snips at the ready! Here we go!

Step 1) Getting Started

Before we begin placing components and soldering we should first place your components in a small tub so that they don't roll off your table or get lost.

Lay the PCB out infront of you and take a close look at all the components we will be using.

Furher explanations and detailed specifications of all these components can be found in our Wiki.

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3D Model

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[ OBJ & MTL ]

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