Electro132
- Feb 12, 2013
- 261
- Joined
- Feb 12, 2013
- Messages
- 261
Hi,
I need some help on my assignment involving the EMF spectrum and sound. It is also about creating vibration from sound using LED. I'm stuck with these questions:
1) Explain how sound can be used on LED.
2) Briefly describe how different Frequencies can be used to create sound.
3) You are given the frequencies 40 hz and 3.1 Ghz. how often do each of these frequencies peak and trough per second?
4) You are given 2 statements:
1 - "The higher the resistor for the same capacitor makes the frequency lower (e.i. 1.5 ohms), but the lower the resistor for the same capacitor makes the frequency higher (e.i. 3.38 ohms)"
2 - "The higher the capacitor for the same resistor makes the frequency higher (e.i. 1.0 ohms), but the lower the capacitor for the same resistor makes the frequency lower (e.i. 0.48)"
Using these statements, find out why changing the value of the capacitors are different than changing the value for resistors.
5) Which of these can you use to replace a tuning capacitor and why:
i) A log pot ii) Linear pot iii) None
6) Explain how electrical current can be turned to sound with a diode after it has been picked up on the FM band. What happens when you amplify the converted sound and projected it out using LED? Does sound have the ability to be carried onto Light waves?
Thanks
I need some help on my assignment involving the EMF spectrum and sound. It is also about creating vibration from sound using LED. I'm stuck with these questions:
1) Explain how sound can be used on LED.
2) Briefly describe how different Frequencies can be used to create sound.
3) You are given the frequencies 40 hz and 3.1 Ghz. how often do each of these frequencies peak and trough per second?
4) You are given 2 statements:
1 - "The higher the resistor for the same capacitor makes the frequency lower (e.i. 1.5 ohms), but the lower the resistor for the same capacitor makes the frequency higher (e.i. 3.38 ohms)"
2 - "The higher the capacitor for the same resistor makes the frequency higher (e.i. 1.0 ohms), but the lower the capacitor for the same resistor makes the frequency lower (e.i. 0.48)"
Using these statements, find out why changing the value of the capacitors are different than changing the value for resistors.
5) Which of these can you use to replace a tuning capacitor and why:
i) A log pot ii) Linear pot iii) None
6) Explain how electrical current can be turned to sound with a diode after it has been picked up on the FM band. What happens when you amplify the converted sound and projected it out using LED? Does sound have the ability to be carried onto Light waves?
Thanks