Check hardware schematic

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.

Skills: Arduino, Electrical Engineering, Electronics, Microcontroller, PCB Layout

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About the Employer:
( 6 reviews ) Porto, Spain

Project ID: #18144674

24 freelancers are bidding on average $160 for this job


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 m More

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(24 Reviews)

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$111 USD in 2 days
(37 Reviews)

Hi I am interested to your project.I am familiar with electronics, microcontroller as well as PCB design by Eagle. Thanks.

$250 USD in 10 days
(86 Reviews)

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, More

$150 USD in 5 days
(53 Reviews)

Hello Hiring manager How are you? I am an expert in electrical engineering with more than 8 years of experience and I have rich experienc e in developing various IoT devices using ESP8266 (it has only WiFi), ESP32 (it More

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(15 Reviews)

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.

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(7 Reviews)

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 o More

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(7 Reviews)

Hi, I am Janith Kodithuwakku. I am an Electronic engineer with more 4 years of experience in Electronic design and product development. I think I can help you with your project. Please refer my linkedin profile if More

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(8 Reviews)

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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 hir More

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(6 Reviews)

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 an More

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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 More

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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 More

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