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Assistance with 8th order Butterworth notch filter circuit

$30-250 USD

Teljesítve
Kiadva ekkor: több mint 2 évvel ezelőtt

$30-250 USD

Teljesítéskor fizetve
I implemented a guitar stomp box circuit several years ago. It eliminates 50-60Hz hum for single-coil guitar pick-ups. I implemented and simulated this circuit in LTSpice. I then had a design shop convert the Spice circuit to Altium for fabrication and assembly. I recently had a prototype built from the Altium files. It does not work properly. It was not assembled at an assembly house; it was done by hand. The circuit isn't working properly. Is the circuit incorrect or did we botch the hand assembly? Project: 1. Compare the Spice source code with the Altium schematic. Is the translation faithful? There are 20 op-amps and almost 100 caps and resistors. I checked the translation 3 times. I *think* it is clean, but I could be wrong. If there is a translation error(s) please identify it/them. 2. Please review the corrected circuit. Can it be optimized for BOM cost? I used a notch filter. Should I have used an HPF? Can the circuit be improved? 3. Based on (1) and (2), please update the Altium design and generate the fabrication and assembly files for the project. I designed this circuit when I could see. I am now blind and can't take the project any further. You will need access to Altium and Spice for this project.
Projektazonosító: 31827538

A projektről

13 ajánlat
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Aktiválva: 2 évvel ezelőtt

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Felhasználó avatár
Best Altium Design Expert at your doorstep! Dear Client, We can update Circuit and Prototype in "Altium" and generate the fabrication and assembly files for you. We will need both the circuit design and Prototype Design of your existing project for review and we can suggest what is the problem with the same. We have extensive experience in "Altium" based Circuit design, Prototype design and know all the intricacies required to get the job done with perfection. Please message me as there are certain queries and suggestions for robust and reliable product development. With more than 15 Years of experience in PCB Design and Circuit Design in Altium, We can ensure you best quality work and before time delivery. Following is a brief list of expertise that we are carrying: 1. Microcontrollers based circuit design – STM32, STM8S etc. 2. Smart Products - GSM/GPRS/GPS etc. 3. Wireless Products - BLE/Wi-Fi- ESP32/ESP8266/NRF24L01 4. Guitar stomp Box, Butterworth notch filter 5. LTSpice, Altium Please answer the following questions: 1. Are there any specific market standards like CISPER you are aiming? 2. What will be ambient temperature of this product? Let’s have a quick discussion for 5 mins where we would formulate a plan of action of how we shall take this project to the horizons of success. The Price mentioned is for indication purpose and exact would be calculated after requirements finalization. Regards Avi Tech Experts Quality is never an Accident
$180 USD 2 napon belül
5,0 (43 értékelés)
7,4
7,4
13 szabadúszó adott átlagosan $279 USD összegű árajánlatot erre a munkára
Felhasználó avatár
Hi, I have almost 13 years of experience. I have read the details and have a few questions. Please get back to me to discuss it further. Thanks,
$150 USD 4 napon belül
4,8 (268 értékelés)
8,0
8,0
Felhasználó avatár
Hi there,I'm biddin on your project "Assistance with 8th order Butterworth notch filter circuit"Electrical Engineering, PCB Layout, Circuit Design and Electronics I implemented a guitar stomp box circuit several years ago I have read your project description and i'm a Professional Engineer therefore i can do this project for you perfectly.I still have a few questions. please leave a message on my chat so we can discuss the budget and deadline of the project. Thanks. .. .
$250 USD 6 napon belül
4,9 (24 értékelés)
6,6
6,6
Felhasználó avatár
We are a team of Electrical and Electronics engineers, we have successfully completed 1000+ Projects for multiple regular clients from OMAN, UK, USA, Australia, Canada, France, Germany, Lebanon and many other countries. We are providing our services in following areas: • Embedded C Programming. • VHDL/Verilog, LABView/ Multisim/PSPICE • Network Simulator NS2/NS3 • Microcontroller like Arduino, Raspberry Pi, FPGA, AVR, PIC and STM32. • IDEs like Keil MDK V5, ATmel studio and MPLab XC8. • PLCs / SCADA • PCB Designing-Proteus, Eagle. • IOT Technologies like Ethernet, GSM GPRS. • HTTP Restful APIs connection for IOT Communications. Also we have good command over report writing, I can show you many samples of our previous reports. Kindly consider us for your project and text me so that we can further discuss specifically about your project's main goals and requirements. We can deliver your project efficiently within timeline. If you choose me, I think you won't regret. Best Regards.
$250 USD 7 napon belül
4,7 (52 értékelés)
6,0
6,0
Felhasználó avatár
I can perfectly help you out regarding any kind of filter design e.g. Butterworth,or chebbysheve etc and i am expert in this domain with 5 to 6 years of domain experience.
$200 USD 7 napon belül
5,0 (14 értékelés)
5,1
5,1
Felhasználó avatár
Hi I can update Circuit and Prototype in "Altium" and generate the fabrication and assembly files for you. I can solve this problem effectively as I have experience with such kind of problems in my past experience. Please share me existing design so I can provide feedback from my side to you. I have humungous experience in and would make the solution cost effective, robust, and efficient. If you are looking for reliable design partner please message me now I provide services of PCB Design, Circuit Design, Circuit Review, PCB review, Circuit simulation, IOT products development and Sensor conditioning product development. The expertise of mine is in the following fields: 1. Wireless Products – BLE, Wi-Fi, NFC, Lora etc 2. IOT sensors interfacing 3. Microcontrollers- ESP32, STM32, STM8S, RL78 etc. 4. GSM, GPS, GPRS, NBIOT 5. BOM, Altium, LTspice 6. Butterworth Notch filter After reading your project details, I have certain queries and suggestions: 1. What is the application of this product? 2. What will be ambient temperature of this product? 3. What are the mechanical constraints to be taken care of? Please try to answer these questions based on which I would be providing free of cost consultation. The Price mentioned is for indication purpose and exact would be calculated after requirements finalization. Waiting for your message, Regards Hari Mohan Engineering for one is a magic for others
$140 USD 2 napon belül
5,0 (4 értékelés)
5,2
5,2
Felhasználó avatár
Hi,  I am a electronics and communication engineer with more than 2 years of experience in PCB and Circuit Designing. I have worked on many projects in past. Here are some software I have used for Circuit/Pcb Designing:- 1. Kicad 2. Altium 3. Eagle 4. Easyeda 5. Proteus (I use this for simulation as well)  6. PADS 7. Pcb wizard I can use any software mentioned above as per your requirements.  Some projects I have worked on previously:- 1. Bluetooth Speaker 2. Bluetooth Gaming Controller 3. Gaming pad based on ESP32 4. Home automation PCB (based on multiple channel relays)  5. Power Bank 6. Some IoT based project.  This are some projects I have worked on. There are many more. So Let's discuss your requirements in the chat. Thanks.  Please have a look at my profile once.  Jaibhan Singh Gaur. 
$30 USD 1 napon belül
5,0 (32 értékelés)
4,5
4,5
Felhasználó avatár
Hello. We are a company of mechatronics, electrical, computer and software engineers with vast expertise in PCB layout. The expertise of mine is in the following fields: 1. Wireless Products – BLE, Wi-Fi, NFC, Lora etc 2. IOT sensors interfacing 3. Microcontrollers- ESP32, STM32, STM8S, 4. GSM, GPS, GPRS, NBIOT 5. BOM, Altium 6. Butterworth Notch filter We have completed several projects in hardware and pcb design. We can assure you that your work will be done within the given timeline with complete task achievement. Feel free to contact for further queries so I may guide you well.
$300 USD 7 napon belül
5,0 (9 értékelés)
4,4
4,4
Felhasználó avatár
A ) I have over 20 years of experience in PCB Layout, HW, RF, EMI, FW, PSpice … etc. we can complete various design and layout requirements and Android / iOS app development. # 8051 MCU / ARM Embedded system / Arduino / STM32 / IM6x / AVR / TI MSP430x / PIC / EP32 # WIFI / BT / BLE / GPS / LCD / DTV / MD / Web Camera / LED / Lighting / RPIx / CM4 / CM3 / UP CORE PLUS # LCD Inverter / Touch sensor / NIC / LAN / KSZ9031RNX / LAN8720 / IOT / nRFF528x / ESP8266 / TI CC26x # Battery / Solar Charger / BMS ( Battery Management System ) / Audio / CSR / Codec / AMP / IO-Link / LTE EC25 / BG95 B ) I can use as below to design and layout # Altium # Protel99SE # Eagle # PADS # KiCad # OrCad # Allegro # Proteus # DipTrace C ) I can communicate well in English, please contact us by e-mail or s-k-y-p-e me (saludpcb) to find out relevant details D ) I also have to provide PCB layout design service (super low price) # 1 ~ 8up layers ( PCB / FPCB ) High Speed / High Density PCB layout # Differential Signal PCB layout # RF Signal PCB layout # 3D Models # FreeCad E ) PCB / PCBA (EMS) # Prototype # Components procurement # Assembly # High quality # Quick, 24hr lead time # Low cost
$250 USD 7 napon belül
4,9 (6 értékelés)
4,0
4,0
Felhasználó avatár
Hi there. I am a schematic and pcb designing expert and programming expert. I often used Eagle and Altium Designer for schematic and pcb designing. Here's an example I've completed. -https://www.freelancer.com/projects/pcb-layout/PCB-Adjustments/reviews I have just read your requirements in detail and became interested in this project. As you can see my review, my specific skills are electronics and electrical engineering. I developed a digital relay protection device by relay using microcontroller and I tried to communicate between device -HMI , device-PLC and device-PC. I've tried manipulating Wireless communication by Zigbee and RF, Rs485 communication, 232 communication, and USB communication according to the MODBUS communication protocol and LCD control, SCR control and IGBT control, etc, with Microcontroller, Arduino and Raspberry Pi, etc. I use programs such as Altium Designer, Proteus, mikroC PRO, Pic c, Mplab, HI-TECH, Keil, python and Qt etc. I’m also full stack web developer. I am confident I will be able to carry out this project and I am ready for your test at any time. So, I hope we will discuss more details about your project through chat. Then, I'll do my best for you and I'll give you the best results within the specified deadline. I am a person who puts credit first. Looking forward for your response. Best Regards.
$200 USD 7 napon belül
5,0 (2 értékelés)
3,4
3,4
Felhasználó avatár
Assistance with 8th order Butterworth notch filter circuit I am a professional MBA writer with more than 7 years of experience in every field of writing. I did thousands of projects with 100% accuracy and on requirements, My promises included; best efforts, plagiarism-free work, deadline guaranteed, your privacy protection! I did many assignments, quiz, business plan, sales, and marketing plan, SEO articles & blogs, many more, etc. please come to the chatbox and try me once I am confident I will not let you down. waiting for your reply thank you. Please see samples of my recent work via the link; https://www.freelancer.com/u/Stopsolution
$30 USD 1 napon belül
0,0 (0 értékelés)
3,4
3,4
Felhasználó avatár
Hi I am an electronic engineer with 30 years experience in design. I would be pleased to assist however to do this project justice would take time. I would want to look carefully at the original design and recalculate the filter parameters - 8th order is quite high and it may be that the filter is unstable. Simulation is a little artificial as it is difficult to simulate parasitic capacitance so it may be better to make a few boards by hand to evaluate the circuit. It is possible that the noise is a result of poor PCB layout. Finally, it may be as simple as a dry joint that is causing the problem. Anyway, happy to help but to give the project the attention it may need will take some time. My bid numbers are wild guesses as I would need a lot more information to be more precise. Happy to take it an hour at a time. Music is a wonderful thing - take care
$1 499 USD 28 napon belül
0,0 (0 értékelés)
0,0
0,0

Az ügyfélről

UNITED STATES zászlója
Seattle, United States
5,0
1
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Tagság kezdete: szept. 7, 2019

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