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### Course: Exploratorium>Unit 4

Lesson 3: Turn Light into Sound

# Construct the parallel circuit, put it all together

A detailed demonstration of how to build this project, from beginning to end. Created by Exploratorium.

## Want to join the conversation?

• why is a signal wire shielded when surrounded by a copper wire?
• it is done so that your signal dose not get interrupted
(1 vote)
• Why does current produce heat ?
• Because when electric current flows through a circuit there is a certain amount of resistance, i.e. the flow of electrons is partially blocked and some signal strength is lost. As you probably know, when energy in an electric current is lost, it converts to light and/or heat. Another example of this is an old fashioned incandescent lightbulb. When you flick the switch, electricity flows through a special wire which has very high resistance. The high resistance converts current into light and heat, so the bulb lights up. (And gets very hot as well.)
• why did u connect the copper shielding of the mono plug into the circuit as well?
• the mono plug has two wires inside it one of the wires acts as a shield
(1 vote)
• How far away can you place the LED light from the solar panel and still transmit the signal effectively?
(1 vote)
• That all depends on three things:

1. The strength of your light (from the Light Emitting Diode)
2. The quality of your filtration on the receiving side (how well do you reduce the ambient buzz of lights)
3. The strength of your amplification (how loud you run your speaker.)
• Dear Friends,
does any of you know why are electrical wires cylindrical?
• what are the materials needed?
(1 vote)
• At you talk about that there is a leading wire around the signal wire within the cable. But then you connect one of these to plus and the other one to minus in the end? Please explain.
(1 vote)
• Does it matter what lead you use or do you have to use certain colour because they each do a diffrent job?
(1 vote)
• is this project expensive? its sometimes hard to get my hand on extra cash if its a high price it is was it is but you know...
(1 vote)
• I don't think it's that expensive, but I've never tried it before so I don't know. I'm just going to say it's more than cheap, but less than expensive. Just in the middle.
(1 vote)