Finalizat

Diagnose and repair an electrical circuit issue with relays

We have a circuit board with a very specific issue. We have an ESP32 controlling 2 latching relays using a dual h bridge driver. When the board is powered by the acdc module, turning on and off relay 1 stops the ESP32 from working. This happens randomly but consistently enough to render our product faulty. We need a freelancer to diagnose the issue and suggest repairs that will be made this end until the issue is no longer present.

Assuming this was a back EMF issue we have since applied bidirectional TVS diodes. This appeared to stop the issue on relay 2, yet it persists on relay 1. We have scoped the relay signal but it doesn't appear to show a consistent issue.

Ideally, knowledge of the ESP32 would help here as we can look into the error codes that are sometime posted when the chip fails but manages to restart.

Aptitudini: Microcontroller, Electronică, Inginerie electrică, Analog Electronics

Despre client:
( 6 recenzii ) Reading, United Kingdom

ID Proiect: #24227447

Acordat lui:

CRK80

TVS will not solve the problem as it's for transient arrest. EMI/EMC specialist here and we have resolved many such complex EMI issues. Feel free to connect for a quick chat and will help you resolve this as well as e Mai multe

%selectedBids___i_sum_sub_7%%project_currencyDetails_sign_sub_8% GBP în 7 zile
(3 Recenzii)
3.9

13 freelanceri licitează în medie 164£ pentru acest proiect

sagradoamicus

Hi I am experienced electronics engineer with more than 11 years of experience. I would like to know about the system to try diagnose it Please get in touch if you are interested in working with me Regards

%bids___i_sum_sub_35%%project_currencyDetails_sign_sub_36% GBP în 7 zile
(241 recenzii)
7.9
jitendrabaraiya

i have more than 8 years experience in electronics and embedded circuit design .i have good knowledge on esp32 with relay . so i could solve your problem .

%bids___i_sum_sub_35%%project_currencyDetails_sign_sub_36% GBP în 7 zile
(6 recenzii)
4.6
BlackStarGazer

Hello Is there a schematics for this ? Maybe you're using some ADC2 Pins and Wifi is working ? some more info please , also the part number of the used relays . Regards

%bids___i_sum_sub_35%%project_currencyDetails_sign_sub_36% GBP în 15 zile
(2 recenzii)
4.4
olaideejiwole

Hello sir/ma, I'm interested in taking this task up for you. I am an Electrical Engineer with a masters degree and I have high proficiency knowledge in: FPGA firmware in VHDL and Verilog for Altera/Actel/Xilinx FPGAs a Mai multe

%bids___i_sum_sub_35%%project_currencyDetails_sign_sub_36% GBP în 2 zile
(11 recenzii)
4.1
buxusa

I had similar problems with ESP8266 and relays. I think it is not an EMF issue, but the problems come from the H-bridge. If you can provide me with schematics of your layout I may be able to help you

%bids___i_sum_sub_35%%project_currencyDetails_sign_sub_36% GBP în 3 zile
(2 recenzii)
4.0
danish2051

I am specialist in development and interfacing between Android application and arduino board. hardware designing for embedded hardware. software development for embedded hardware. Home automation. Controlling hardware Mai multe

%bids___i_sum_sub_35%%project_currencyDetails_sign_sub_36% GBP în 8 zile
(12 recenzii)
3.9
omoboladeolumode

I am a Professional Electrical Engineer with a masters degree and extensive knowledge in FPGA firmware in VHDL and Verilog for Altera/Actel/Xilinx FPGAs and EEG signal, MCU firmware in C/C++ for ARM, TI, NXP, Atmel, PI Mai multe

%bids___i_sum_sub_32%%project_currencyDetails_sign_sub_33% GBP în 1 zi
(0 recenzii)
0.0
Yipeng

It seems a electrical circuit design issue. With your board design files, I can remotely analyze and fix the issue.

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(0 recenzii)
0.0
raymond96521

I think I could help you to solve your problem. I have experience on ESP32 system design and driver design.

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(0 recenzii)
0.0
geraxiquin

Hi I would like to see the schematic diagram and the designated programming for the modules involved, it will be a pleasure to collaborate on the project

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(0 recenzii)
0.0
amoghtechind

Dear Sir, We would propose some isolation solution to eliminate this issue. as we had design experience with power meter circuit with 3 phase power analyzer circuit. If interested you may kindly discuss with us. Tha Mai multe

%bids___i_sum_sub_35%%project_currencyDetails_sign_sub_36% GBP în 3 zile
(1 părere)
0.0
CuriousSoft

Hello Sir, may i know why you used bidirectional tvs diode? afaik that is not suitable for removing back emf. regards

%bids___i_sum_sub_35%%project_currencyDetails_sign_sub_36% GBP în 2 zile
(1 părere)
0.2