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Design a simple circuit to generate interrupt when Rate of Change is > XXX

$50-100 USD

Closed
Posted about 7 years ago

$50-100 USD

Paid on delivery
Measure frequency of sine wave as low as 200mv pk-pk. Frequency is normally at 50hz. Generate interrupt to micro controller when the rate of change of the frequency is > 0.5hz over 500ms. Again we are interested in the Rate of Change not a hard upper or lower threshold. The circuit must be adjustable to that we could chane the threshold from 0.5hz/500ms to say 1hz/500ms
Project ID: 13172379

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14 proposals
Remote project
Active 7 yrs ago

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14 freelancers are bidding on average $93 USD for this job
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Whatsapp: +92 321 6624970 I am an Electrical Engineer having specialization in Electronics and Control, teaching at Electrical Department FAST National University Pakistan. I am also persuing my MS degree in Electrical Engineering with specialization in CONTROL. I have taught the followings courses, and also done many projects related to these subjects as well as related to consumer electronics products. 1. Control System Design & Modelling (Continuous, Discrete, Linear, Non-Linear, Optimal, Fuzzy Logic + Matlab & Simulink) 2. Digital System/Logic Design (Verilog, VHDL, Logisim) 3. Digital Signal Processing (MATLAB) 4. Micro-controllers (8051, Arduino, PIC) 5. Power Electronics (PSIM, MATLAB, PSpice) 6. Control of Electric Machine Drives 7. Circuit Analysis and Designe etc 8. PCB Design (Proteous + Ultiboard + Altium Designer) I assure you, if you assign your project to me, you surely gonna work with me in future. Note: I also provide the services in Mechanical Engineering Projects.
$100 USD in 3 days
4.8 (280 reviews)
7.4
7.4
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Hello, Good morning and have a great day. I am running a company for developing Electronic circuits. We will design and test the circuit. this is purely analog circuit. Please feel free to contact us. Regards, Shahbaz
$100 USD in 10 days
4.8 (88 reviews)
7.2
7.2
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This product needs to be designed properly in order to work correctly. I will design the schematic using some analog part where the it will take the input sinewave and shape it properly. Then there will be a microcontroler based frequency measurement thing to check the ROC (Rate of change) value of this frequency. It will be crystal trimmed so the precision of this measurement will be accurate enough. The center frequency will be used as 50Hz and when it changes X amount in the specified period then it will drive something you need it for, My bid includes Schematic design, a small PCB design which you can easily fabricate to assemble the parts on and the firmware. I will breadboard the design to validate and test the design as well as the firmware. Lets discuss and get it done. Thanks for your time and I look forward to hear from you. Regards... Roy
$199 USD in 10 days
5.0 (53 reviews)
6.3
6.3
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Hello Dear, I am an expert with more than 15 years of experience in the field of embedded systems, electronics and prototype development. I have checked the details of your project. I assure you the best solution for your work. We can measure the zero crossings of the sine wave using an MCU with adc. The rate can be changed on board using some variable resistance. Regards Ch
$70 USD in 10 days
4.5 (64 reviews)
6.3
6.3
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hi, I am an electrical engineer with experience of four years in embedded and power electronics industries. I have designed ofline UPS of 2 KVA with changeover in less than 3 ms. In this I used PLL and accurate frequency measurements This could be possible with the help of microcontrollers only.. Do let me know if you have any questions Hoping to hear from you, Jaydip kathiriya
$94 USD in 4 days
4.9 (25 reviews)
5.8
5.8
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Hey I am an expert embedded software engineer. I have made many projects using many different micro controllers. Please contact me for more details.
$70 USD in 10 days
5.0 (29 reviews)
4.9
4.9
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Hi, Please share your complete project requirements(like max input voltage, size,...)/task expected from us. About us: We have 10 years of experience in Product development. Micro-controllers we can work on PIC, STM32, PSOC and AVR and also we have all the development kit and instruments available with us. For PCB design we use KICAD v4. And for GUI C# / LABVIEW will be used. Thanks and Regards, Santosh
$111 USD in 10 days
4.8 (5 reviews)
4.0
4.0
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Hi, Just wondering why you don't run a routine on your microcontroller to monitor the sin wave frequency on an analog input pin, chat to me about this because based on what you have said you shouldn't need any additional hardware.
$100 USD in 10 days
5.0 (2 reviews)
3.4
3.4
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Hi If you mean by micro controller "AVR Series" I am the right person to do the project. just tell me would you like it to be written in CodeVision or Bascom? I have 5 years of experience in AVR programming.
$77 USD in 5 days
0.0 (0 reviews)
0.0
0.0
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A proposal has not yet been provided
$70 USD in 10 days
0.0 (0 reviews)
0.0
0.0
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I can do your job with small budget. I will finish your job well according to my experience in this field.
$61 USD in 10 days
0.0 (0 reviews)
0.0
0.0
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A proposal has not yet been provided
$55 USD in 0 day
0.0 (0 reviews)
0.0
0.0
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I have worked on Op-amp based circuits extensively. This concept is achievable. I need some more details, such as does frequency of sine wave will be interpreted by micro controller as count, or by analog.
$111 USD in 10 days
0.0 (0 reviews)
0.0
0.0

About the client

Flag of IRELAND
., Ireland
4.6
30
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Member since Dec 16, 2011

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