help me to fix a bug in a frequency generator (arduino)
€8-30 EUR
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Publicado hace más de 5 años
€8-30 EUR
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Hello,
I have a frequency generator made with a arduino UNO + AD9833 + TIP31+ step up converter (DC)
I can set the frequency via the serial monitor in the arduino software
Then the circuit can be unplugged from the computer and powered by a 12V power source and will work independantly
The circuit produces an electric signal with a min voltage of 0V, max voltage between 12V to 48V (with 1V precision) (set with a step up converter), frequency between 1hz to
100000hz (with 1hz precision) (set with serial monitor), square waveform, 50% duty cycle,
the device works well but there was a problem (bug / error) that the designer of the circuit did not manage to fix :
sometimes the frequency which is uploaded to the device results in an appropriate signal, but sometimes, for some reason, this results in a weird senseless signal. (min voltage, max voltage are not stable, frequency is not stable, waveform is like noise)
Your work, if you accept it, will consist in finding the cause of the problem, and proposing a solution to fix it. (i will provide the schematic of the circuit)
additionaly, i want to add a mod to the circuit :
->i want to have a feedback message in the serial monitor, to be sure that the frequency that i have uploaded is correct. (or maybe display the frequency on a small external screen ?)
Once the device works as described, the work will be considered finished and i will release the milestone(s)
At the end, i will create another milestone to pay your freelancer fees.
I am flexible for the time it takes or the money it requires to complete this project, as long as it is justified and reasonable...
If you have any questions, don't hesitate to ask.
Thanks for your help,
Hi, how are you.
I have worked with the AD9833 on a project to generate a square wave in relatively low frequency (under 1kHz), never seen what you are describing.
I have a couple of hypothetical questions:
Have you tested (with an oscilloscope) the input of the step-up converter and the output. to be sure that the DC converter is not the problem.
I don't know how you used the TIP31, maybe you have reached the limit of its bandwidth, it may misbehave at the extremities.
Does this behavior of senseless signal, happen at a certain range of frequency/Gain or it may happen any time at any frequency.
is the problem reproducible or completely random.
does the AD9833 respond to commands while in this unstable mode.
If in terms Of hardware everything works fine, then maybe it s a software problem, even though i am suspecting a hardware problem, such as AD9833 is defected or something like that.
Looking forward to work with you.
€25 EUR en 1 día
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8 freelancers están ofertando un promedio de €51 EUR por este trabajo
Hello. Im designing different electronics devices, mostly based on avr, arm MCUs and boards with them like arduino, stm-discovery etc.
(autopromotion^))
Let me see what you have and lets talk.
Bid is not final due to lack of detailes for now.
hello
i have worked on embedded system for 4 years
i have also worked on arduino i think i can solve your problem
i will like to know details about the project and i will like to work with you
thank you
raja chowdhury
Within my proposal, I can offer you additional extras. with 23 years of experience.
I can make your proposal with all the details you need. I can improve your proposal, with a mutual agreement.
I have worked as heads of automation engineers, processes in several machine design management companies and industrial production plants.
other forms of optimization, improving the manufacturing process, etc., we can discuss the details of your needs in the chat.
I have already done this type of analysis for this application the matlab, labview, and others.
I am interested in your project
I can do your project
Atte.
ING. Luis Moreno