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$30-250 USD

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Disiarkan lebih dari 5 tahun yang lalu

$30-250 USD

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Hello, I have made the circuit attached. It is basically, a wattmeter with WiFi (ESP8266). It has been designed to be connected to an European plug (230VAC). -This wattmeter can turn on/off the current flow. -The ESP8266 will be programmed using a USB to TTL adapter. -It has 2 ways of measure the current (using integrated ADC in ESP8266, or using an external ADC). I need someone to verify the circuit has no errors. Additionally, I need suggestions on how I can improve it to reduce costs. Please, tell me how are you going to verify the circuit, and what are you going to deliver to me. I want to be totally sure, that I can send this circuit to production and everything will work as expected.
ID Projek: 18144674

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21 freelancers are bidding on average $165 USD for this job
Avatar Pengguna
Hi I am experienced electronics engineer with more than 8 years of experience. I have completed a number of projects on circuit design. I can do it for you. I have completed a number of projects here Please review my profile to see the feedback from my previous employers Regards
$200 USD dalam 3 hari
4.9 (265 ulasan)
8.0
8.0
Avatar Pengguna
Hello sir, I have experience in designing electronics circuits and can make your project. i will make your project completely on my side and will deliver a working prototype. I can also develop hardware compatible android and windows based apps. I can show you my previous experience on similar projects. If you wish we can discuss in chat. Thanks
$200 USD dalam 15 hari
4.8 (59 ulasan)
6.9
6.9
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Hello, We are a design team include 3 groups: System Design, Layout PCB & Mechanical. We have +15 years experience of Developing custom electronics, Hardware Design, Firmware, Software and +5 years experience of 3D mode (3D print, CNC and molds). Our key skills are IoT, Embedded KIT, Digital & Analog, High-speed, Memory, WIFI, GPRS, GPS, RF, BLE... We have designed up to +20 layers PCB. Experience designing high density boards include FPGA, Flash, DDR, PCIE, SATA, Ethernet, BLE, WIFI, HDMI, USB, QSFP, LVDS...etc. Also, we provide FAB, ASSEMBLY & TEST services. We can make any prototypes, even support mass production. We use the expertise of the following software: - Allegro/Orcad - Altium. - Eagle - Mentor Pads. - Expedition - Solidworks/ Autocad. - C/C++ - Android, IOS... We provide Service & Support even after completion of the projects,when ever necessary. Please contact me & we can discuss more. Best Regards, BK Technology
$250 USD dalam 3 hari
5.0 (27 ulasan)
6.7
6.7
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Hi, I have checked your attachment. On AC/DC block diagram, I don't see any problem since that is standard circuit for switching power supply. but I will looking for deep circuit analysis if you want me to do it. So, for this block, I don't see any error. I think problem is occur On UCBLOCK, first, on HALL block, where do you connecting HALL_OUT signal? it's outgoing nowhere. Second is Resistor divider block, where do you get DIV_IN signal and where DIV_OUT signal go? third is ADC part, where is ADC_IN come from? I think it's just confused variable signal name that should be corrected, the entire circuit seems ok for me, but, if you want me to analyze per block, let me know every single IC's PART NUMBER in UCBLOCK, I will check the details, referring to design guide, and make some corrections if needed. I guess that's all what I will doing if you choose me to work with you to confirm this schematics. My background is Electronic engineering, and I work on Defense Industry, So I know how to make circuit work propperly as well as find a way to analyze it. let's get in touch over messenger. let me know every IC's part number in both UCBLOCK & ACDC, and let me analyze your schematics. Best Regards, Rijal
$150 USD dalam 5 hari
4.9 (77 ulasan)
6.3
6.3
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$111 USD dalam 2 hari
4.7 (37 ulasan)
6.5
6.5
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Hi I am interested to your project.I am familiar with electronics, microcontroller as well as PCB design by Eagle. Thanks.
$250 USD dalam 10 hari
4.9 (93 ulasan)
5.9
5.9
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Hola, Soy Ingeniero de desarrollo en software y hardware, tengo experiencia mayor a 7años desarrollando sistemas completos, desde el diseño y fabricación de los circuitos electrónicos pasando por las interfaces HMI, hasta aplicaciones para sistemas operativos como Windows y Linux con comunicación a servidores y base de datos. Ya tengo sistemas funcionando con los chips ESP8266 y ESP32, cómo cerraduras inteligentes, key finders, sistemas de identificación de usuario para sala de Casinos, entre otros. Bueno me gustaría saber más sobre el proyecto y así poder compartir mi experiencia en la solución de este proyecto. Saludos. Jhon Zumaeta
$222 USD dalam 3 hari
5.0 (3 ulasan)
4.7
4.7
Avatar Pengguna
Dear Sir. I am very interested in participating in the revision of your circuit. Throughout my career I participated in many circuit reviews and fault detection. I am a Senior Electronic Engineer with experience in the design / development of embedded systems implemented with DSP, FPGA and Microcontrollers. In my 6+ years of experience in the Aerospace and IoT industries, I worked in electronic/circuit design, PCB layout, embedded C programming and digital design. I checked the schematic in a general way, and I found to make corrections and improvements. I have the skill to solve problems, the rapid understanding of what is required, seriousness and responsibility to carry out the work in the best way. I am new to the freelance platform, but I am sure that I am the professional who can do this job. You can trust that I will give my best to deliver a work that exceeds your expectations. Thanks for your consideration Best regards
$200 USD dalam 3 hari
5.0 (3 ulasan)
4.7
4.7
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I am an experienced Electrical and Electronics Engineer living in Cyprus. I am specialized in Microcontrollers ESP3366, ESP32, Arduino, RaspberryPi. I also worked on lots of Matlab and simulink related projects.
$66 USD dalam 1 hari
4.9 (8 ulasan)
3.7
3.7
Avatar Pengguna
Hi Dear, I can help you in this project. This is exactly what we are doing in our project. Basically I am running a startup named as Invotech in the field of IoT. We are making different smart products. In one of our product we are giving power calculation feature, which show whole energy consumption on mobile App, which is somehow related to this project. But in your product you are only calculating the current using hall sensor and ESP8266. Based on our experience we can do you work in a better way. We can also collaborate in future for R&D of your products. Best Regards Abdul Rehman Rao
$222 USD dalam 3 hari
5.0 (7 ulasan)
3.7
3.7
Avatar Pengguna
I am an Electrical Engineer having specialization in Electronics Control and Power, teaching at well known University in Pakistan. I have my BS degree in Electrical Engineering with specialization in Power. Also i hire many persons in my Company for freelancing. They know many skills like Graphic designer, Logo Designer, Video Editing and Data entry. 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 and Computer Science related projects.
$50 USD dalam 1 hari
4.6 (12 ulasan)
3.7
3.7
Avatar Pengguna
Hi, I think that you can get rid both of the external ADC (assuming that you don't need a very high precision) and of the level snifters, also you can use the cheaper version of esp8266 (ESP01) thus saving space and costs. What I will do for you is to re-design the circuit & measurement system and to build a working prototype, if you want I can also send it to you so you can test it by your own. (The cost of components, delivery and taxes is NOT included the bid) There are some considerations to be assessed, IE do you plan to use a transformer (safer solution and power saving) to measure voltage or you want to feed (with a voltage divisor) the tension to the micro ? For the Current too: do you plan to use a con-tactless loop transformer (very safe) or you're bound to hall effect sensor ? Also, since is a circuit that needs to be connected to mains it has to be tested very carefully or you risk to fry the electronics. Also I assume that the step-down converter will be already tested and provide 3.3 V instead of 5 V. If you want to start a mass production, my opinion, you should have a choice so select two freelancer for the same project: there are very good ones and ones that are not so good... so saving some $$$ may not be worth in your case. To further facilitate you I've divided the project in two steps, with a first minimal fee. Of course I'll be glad to be one of the two. All the best, Alex.
$222 USD dalam 30 hari
5.0 (3 ulasan)
1.7
1.7
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I have experence with IoT project. I can review schematic, pcb layout and 3D model for complete integration
$166 USD dalam 5 hari
4.6 (1 ulasan)
1.2
1.2
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$49 USD dalam 2 hari
4.9 (5 ulasan)
1.1
1.1
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Dear Recruiting Department, I am Zunaira Zaka. I am a professional content writer and an Electronics Engineer. I have been doing content writing and technical assistance to different client for academic projects on Freelancer. Along with that I have been doing blogging and product reviewing as per client requirement. I can provide you excellent work from home as I am aware of content developing and have been working in this field for four years. Awaiting for your positive response Best Regards Zunaira Zaka
$100 USD dalam 2 hari
0.0 (0 ulasan)
2.0
2.0
Avatar Pengguna
Para probar el circuito, lo mejor siempre, es construirlo. Puedes utilizar simuladores, pero soy de la vieja escuela. Cuantos ampereos máximo contabilizará el watímetro? Puedes utilizar relés de estado sólido, o relés normales. Aconsejo poner fusibles autorearmantes en la entrada. Hay mas cosas, llamame si gustas 602694169
$222 USD dalam 3 hari
0.0 (0 ulasan)
0.0
0.0
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I execute projects meticulously, fast and on time with high accuracy. I am highly interested to long term and/high volume collaboration, which gives me an edge in terms of the price that I can offer.
$277 USD dalam 3 hari
0.0 (0 ulasan)
0.0
0.0
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i have experience for coding esp8266 with arduino ide. your project is awesome. give me chance to help you.
$155 USD dalam 10 hari
0.0 (0 ulasan)
0.0
0.0
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I am an electronic designer specialized in embedded systems. I have more than 10 years developing systems from pcb to applications. I've designed carrier boards for ARM soms and display boards(using hdmi and lvds). I have also designed small boards for MSP430, STM32 and Microchip microcontrollers. All boards had to be IEC 61000-compliant. I have used Altium and CADENCE.
$111 USD dalam 3 hari
0.0 (0 ulasan)
0.0
0.0
Avatar Pengguna
Hi there. I am a master student with a lot of skills that I know I can be so helpful to you. I am the best choice for this project as long as I am master student and writing my paper, I know really what writing is. Moreover, I have that much time beside my study and I am so motivated to work with you regardless what is the payment will be because I am new to this website and I want to enhance my profile. But really I have a lot of work that I have done out of freelancer.com. Thank you for your time reading. Nazim
$88 USD dalam 1 hari
0.0 (1 ulasan)
0.8
0.8

Tentang klien

Bendera SPAIN
Porto, Spain
5.0
7
Ahli sejak Dis 8, 2013

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