Waves Project for a Micro Controller - Page 2 - Electronic Circuits Projects Diagrams Free

blueroomelectronics · 29th November 2007, 12:03 AM

Doesn't matter what language you use, you still have to understand the problem / algorithm before you proceed. The project is not trivial and beyond most beginners. Do you have a schematic for it yet? How are you going to filter the output stage? What is the output D/A ladder or PWM? Which pins go where?

Vesko · 29th November 2007, 09:02 AM

Man that is the problem I don't know nothing. I don't eaven know what you are talking about =/ .My specialty is IT and electronics and this is my furs semester and it is mixed and I want to go IT so my goal is just to pass the electronics and this is almost the last exercise.
I don't have any specifications only thous that I sad until now. Everything I have to figure out by my self. =./

matc · 29th November 2007, 04:41 PM

You should mention to your teachers that you don't know where to start - there is clearly a mismatch between you and the course.
If you've got a specific question, ask here.

Vesko · 29th November 2007, 05:53 PM

Yea actually I did that. But i the main teacher is missing for 3 days so no luck there for now :S

simrantogether · 30th November 2007, 01:10 PM

Quote:

Originally Posted by Vesko

At my school the teachers must have gone mad because they given as a project for micro controllers without any information about the micro controllers, just gave was the data sheet and we have to finish it for 2 weeks and one have passed. I tried to do something about it but I don't know where to start it is like searching for a branch in the forest. The only back ground that I have is a little C programing but it is not helping me much. We are using PIC16F690 microcontroller. If some one can help me withe code ore some thing I will be MOST great full!

The REQUIREMENTS:

The student must build a ‘digital function generator’.
Waveforms
• Sine
• Square
• Triangle
• Sawtooth
The waveform must be selected with a ‘switch’.
The frequency of the signal must be adjusted with an analog input signal.
There is no requirement to adjust the amplitude of the signal.

Wonderful,

all the waves that you mentioned can be produced with DAC - Digital to Analog converter..

I dont know whether pic has that or not...

but you can use DAC0800 available in the market.. and give the values accordingly...

Higher value like FF means maximum amplitude ... 80 means medium amplitude while 00 means lower amplitude...

Regards

Simran..

matc · 30th November 2007, 03:37 PM

The PIC has no DAC, but you can make your own R-2R network easily enough, even if you can't get a DAC chip at short notice (circuit diagrams available everywhere).

Vesko · 1st December 2007, 05:12 PM

Thanks guys

blueroomelectronics · 1st December 2007, 05:50 PM

Quote:

Originally Posted by matc

The PIC has no DAC, but you can make your own R-2R network easily enough, even if you can't get a DAC chip at short notice (circuit diagrams available everywhere).

Actually many PICs now have a very course 4bit DAC

matc · 1st December 2007, 07:55 PM

Quote:

Originally Posted by blueroomelectronics

Actually many PICs now have a very course 4bit DAC

News to me - which PIC are you talking about ?

Mike, K8LH · 1st December 2007, 08:55 PM

The ones with a comparator voltage reference module perhaps?

**Nigel Goodwin** · 2nd December 2007, 03:03 PM

Quote:

Originally Posted by Mike, K8LH

The ones with a comparator voltage reference module perhaps?

Yes, but it's not much use for plotting a sinewave with!

blueroomelectronics · 2nd December 2007, 07:42 PM

It's got 16 steps and a high & low mode, crude but it's there.

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29th November 2007, 12:03 AM	(permalink)
blueroomelectronics	Doesn't matter what language you use, you still have to understand the problem / algorithm before you proceed. The project is not trivial and beyond most beginners. Do you have a schematic for it yet? How are you going to filter the output stage? What is the output D/A ladder or PWM? Which pins go where? __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

29th November 2007, 09:02 AM	(permalink)
Vesko	Man that is the problem I don't know nothing. I don't eaven know what you are talking about =/ .My specialty is IT and electronics and this is my furs semester and it is mixed and I want to go IT so my goal is just to pass the electronics and this is almost the last exercise. I don't have any specifications only thous that I sad until now. Everything I have to figure out by my self. =./

29th November 2007, 04:41 PM	(permalink)
matc	You should mention to your teachers that you don't know where to start - there is clearly a mismatch between you and the course. If you've got a specific question, ask here.

29th November 2007, 05:53 PM	(permalink)
Vesko	Yea actually I did that. But i the main teacher is missing for 3 days so no luck there for now :S

30th November 2007, 03:37 PM	(permalink)
matc	The PIC has no DAC, but you can make your own R-2R network easily enough, even if you can't get a DAC chip at short notice (circuit diagrams available everywhere).

1st December 2007, 08:55 PM	(permalink)
Mike, K8LH	The ones with a comparator voltage reference module perhaps?

2nd December 2007, 07:42 PM	(permalink)
blueroomelectronics	It's got 16 steps and a high & low mode, crude but it's there. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com