I'm putting together my final project for the CET program at ITT Tech. We're supposed to come up with an original project that proves we've learned something.
One of my teachers seems to be obsessed with finding diffrent ways to convince the class that square waves are made up of sign waves. We do not have a spectrum analyser so I came up with this idea. (attached is a rough block diagram
of my project)
Three oscillators (sine, square, and sawtooth, all running at 5 hz) are fed into a multiplexer that is configured with a ring counter to cycle through the oscillators 5 seconds at a time.
The output of the multiplexer splits off to five bandpass filters (5hz, 10hz, 15hz, 20hz, and 25hz, each having progressive gains) with LEDs attached to the filters output.
In theory, or at least in my wacky mind, this is what should happen.
When the output of the multiplexer is the sign wave(assuming the sine wave is pure), the only LED that will blink will be at the end of the 5hz bandpass filter.
When the output of the multiplexer is the square wave, the only LEDs that will blink will be the ones at the output of the 5,15, and 25hz bandpass filters.
When the output of the multiplaxer is the sawtooth wave, all the LEDs should blink at there respective frequencys.
What do yall think? Got any thoughts/suggestions? I'd love to hear anything.
Any suggestions on a better output indicator than an LED?
P.S. Dam, my spelling sucks!
One of my teachers seems to be obsessed with finding diffrent ways to convince the class that square waves are made up of sign waves. We do not have a spectrum analyser so I came up with this idea. (attached is a rough block diagram
of my project)
Three oscillators (sine, square, and sawtooth, all running at 5 hz) are fed into a multiplexer that is configured with a ring counter to cycle through the oscillators 5 seconds at a time.
The output of the multiplexer splits off to five bandpass filters (5hz, 10hz, 15hz, 20hz, and 25hz, each having progressive gains) with LEDs attached to the filters output.
In theory, or at least in my wacky mind, this is what should happen.
When the output of the multiplexer is the sign wave(assuming the sine wave is pure), the only LED that will blink will be at the end of the 5hz bandpass filter.
When the output of the multiplexer is the square wave, the only LEDs that will blink will be the ones at the output of the 5,15, and 25hz bandpass filters.
When the output of the multiplaxer is the sawtooth wave, all the LEDs should blink at there respective frequencys.
What do yall think? Got any thoughts/suggestions? I'd love to hear anything.
Any suggestions on a better output indicator than an LED?
P.S. Dam, my spelling sucks!