# Help me to do this project!!!

#### bfs.07

Joined May 2, 2016
3
I need to make a system which generates, at least, 14 distinsts waveforms.

I know I have to use a multiplexer and a clock signal in the system.

However, which IC, should I use? How can I make this system works?

Thanks

#### crutschow

Joined Mar 14, 2008
26,010
What are the 14 distinct waveforms (amplitude, frequency, shape, etc.) you need.
Can this system use a commercial pulse generator?
What is this for?

#### MrChips

Joined Oct 2, 2009
22,521
Think of how useful (meaning useless) is the title of your thread.
A better title would be:

How to generate 14 different waveforms?

#### nerdegutta

Joined Dec 15, 2009
2,676
Is this homework?

#### wayneh

Joined Sep 9, 2010
16,513
I need to make a system which generates, at least, 14 distinsts waveforms.
You typed this on a computer, right? My computer (or my phone) can generate waveforms. I bet your's can too.

Not good enough? Perhaps you could share what other hidden specifications you have in mind.

#### WBahn

Joined Mar 31, 2012
26,398
I need to make a system which generates, at least, 14 distinsts waveforms.

I know I have to use a multiplexer and a clock signal in the system.
Why do you think you have to use a multiplexer or a clock signal in the system?

However, which IC, should I use?
You could use a PIC12F1501.

How can I make this system works?
By designing a suitable circuit using a PIC12F1501 and writing a suitable program to run on a PIC12F1501.

You're oh so welcome.

#### absf

Joined Dec 29, 2010
1,949
Can 800KHz, 400KHz, 200KHz, 100KHz, 50KHz, 25KHz, 12.5KHz, 6.25KHz, 3.125KHz, 1562Hz, 781Hz, 390Hz, 195Hz, 97Hz square waves be considered as 14 distinct waveforms?

Allen

#### bfs.07

Joined May 2, 2016
3

I need to make a circuit which generates, at least, 16 distinsts waveforms(change the frequency or the length)
I have to use a multiplexer with 16 differents outputs, a counter and a 5Hz clock.
I need also to change the output wave by switching the keys and put a LED in the output. (See the attachment)

I've already done the clock using an IC 555 and I've tried to build this circuit with the multiplexer and the counter, but it doesn't work.

I will attach my current circuit and how should be my outputs(there´s only 4 in the picture I need to make 16 differents waveforms).

What changes should I make?

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#### hp1729

Joined Nov 23, 2015
2,304
I need to make a system which generates, at least, 14 distinsts waveforms.

I know I have to use a multiplexer and a clock signal in the system.

However, which IC, should I use? How can I make this system works?

Thanks
Any microprocessor. Waveforms attached.

Another possibility, an XR2206 or such waveform generator and a bunch of op amps that mix the outputs together, then you could use your analog selector to select one. Data sheet and source attached.

so many possibilities.
.

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#### bfs.07

Joined May 2, 2016
3
Any microprocessor. Waveforms attached.

Another possibility, an XR2206 or such waveform generator and a bunch of op amps that mix the outputs together, then you could use your analog selector to select one. Data sheet and source attached.

so many possibilities.
.
But I have to use a multiplexor and a counter uskng the program Multisim

#### hp1729

Joined Nov 23, 2015
2,304
But I have to use a multiplexor and a counter uskng the program Multisim
I see a counter, 74190. Multisim libraries are pretty slim. I prefer using ORCAD for making schematics. There is a free version very rich in libraries.

#### Alec_t

Joined Sep 17, 2013
11,799
Hints:
You could use cascaded binary counters to get your 16 different waveforms.
A problem with your circuit is that when the key switches are open the D inputs of U1 (a TTL device) default to logic high.