Symphony - Engineer 2009 @ NITK, Surathkal

Transcript

1. ENGINEER 2009 Symphony
2. Problem Statement Make a Fountain Dance to your tunes!!! February 9, 2009 SYMPHONY 2
3. The Fountain February 9, 2009 SYMPHONY 3
4. How to… • Identify components of a Song –Frequencies range from 20 Hz to 20 KHz –Not much variation above 10-12 KHz (approx.) for most songs –Divisions and Decisions February 9, 2009 SYMPHONY 4
5. How to… • Design Filters – Filter  Gives u a signal with frequencies in the specified range – Butterworth Filter (2nd Order)  Very popular February 9, 2009 SYMPHONY 5
6. Circuit Diagram February 9, 2009 SYMPHONY 6
7. How to… • Design Amplifiers – Amplifier  Simply magnifies the input voltage or current – Needed to make the circuit work even if the volume is low – Gives you the control (you always know the output voltage) February 9, 2009 SYMPHONY 7
8. Circuit Diagram February 9, 2009 SYMPHONY 8
9. How to… • Use comparators – Comparators  Compare two signals (voltages) – Use them to control the rate of switching (how many times you want the lights/valves to become on/off per time unit) – LM324, LM311  Popular Comparator IC’s. Just need to give i/p and ref. voltage February 9, 2009 SYMPHONY 9
10. How to… Put together everything LPF BPF I BPF II HPF Amplifier Amplifier Amplifier Amplifier Reference Voltage COMPARATOR LED LED LED LED February 9, 2009 SYMPHONY 10
11. Beware of… • Rate of Switching • The Voltage Swing (An OPAMP typically gives a negative O/P voltage also) • The NOR Gate (NOR all your control signals  goes to the NOR valve). February 9, 2009 SYMPHONY 11
12. Thank You ! Be there at SYMPHONY 2009 Venue: Special Stage (SS) Date: Feb. 15th 2009 Time: 18:00 onwards February 9, 2009 SYMPHONY 12