Portable speaker with sound responsive LED’s

Developed by Sean O’Connor

Your Brief:To design and manufacture a portable speaker with sound responsive LED’s. This product is to be designed as a accessory for your MP3, ipod, phone, Portable radio etc.

23.

Research

Design

Manufacture

Circuit TheoryHow a transistor works!

Circuit TheoryTurning sound to light using a transistor

The LED’s illuminates when the circuit detects a high amplitude waveform. It can be connected to a Walkman, ipod, Phone, mini radio with earphones. This waveform is amplified by a transistor which acts as an electronic switch turning on and off the LED’s to the sound/loudness of the music

The LED’s illuminates when the circuit detects a high amplitude waveform. It can be connected to a Walkman, ipod, Phone, mini radio with earphones. This waveform is amplified by a transistor which acts as an electronic switch turning on and off the LED’s to the sound/loudness of the music

3V

Task: Now draw the circuit diagram for the circuit to the left.Draw this circuit diagram using the components above.

Task: Now label the components used in the circuit above

Circuit Theory

Part A: MUSIC TO Light. The LED’s illuminates when the circuit detects a high amplitude waveform. It can be connected to a Walkman, ipod, Phone, mini radio with earphones. This waveform is amplified by a transistor which acts as an electronic switch turning on and off the LED’s to the sound/loudness of the music.

Part B: SOUND. The second channel can be connected to produce sound through a small speaker.

Beat box circuit diagram

BC109

BC109

2x1.5V Batteries

3.5mm Audio Jack

0.4w Speaker

Rocker switch

LED’s

100n Capacitor

BC109’s

1M R 1K R

2.2K R

Beat box Printed Circuit Board

A

B

How it works! Using the right and left outputs from an earphone jack two circuits can be generated.

ResearchAs a designer research is key to developing a successful outcome, sourcing inspiration in the form of colours, features, form, materials, e.t.c from existing and similar products.

Task: Now cut and paste images onto this page and create a mood board

ResearchTeacher guidance material

ants

DesignNow use your research image as an influence to style your product:

Component layout

Front of casing

Insert research image

ants

DesignNow use your research image as an influence to style your product:

Insert research image

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DesignTeacher guidance material

Now use your research image as an influence to style your product:

ants

DesignTeacher guidance material

Now use your research image as an influence to style your product:

ants

DesignTeacher guidance material

Now use your research image as an influence to style your product:

ants

DesignTeacher guidance material

Now use your research image as an influence to style your product:

Portable speaker with sound responsive LED’s

Portable speaker with sound responsive LED’s

Portable speaker with sound responsive LED’s

Portable speaker with sound responsive LED’s

Circuit Manufacture

Casing Manufacture

2x1.5V AAA Batteries

3.5mm Audio Jack

0.4w Speaker

Rocker switch

LED’s

100n Capacitor

BC109’s

1M R 1K R

2.2K R

Beat box Printed Circuit Board

Teacher resources

Teacher resources