Debug Capacitive Touch PCB

@Ahmed8033

Hello, I have checked your circuit schematic, the connection for the HIGH logic is correct but for low logic your circuit is not correct. The solution is simple, you should add a resistor to the control input feeding your ESP32 GPIO pin, so that when touch does not emulate signal, your GPIO stays at ground by pull down resistor. I have already check this solution is simulation and it works. Feel free to inbox me if you still have the problem.

@mairajali11

As an experienced PCB designer, electrical engineer, and embedded systems specialist, I am highly qualified to debug and fix your capacitive touch PCB. My keen understanding of circuitry, especially with regards to capacitive touch technology, will ensure a meticulous approach to identifying and resolving the malfunction causing unexpected behavior on power-up. Having worked extensively on similar projects involving microcontroller boards like the ESP64-C3, I bring a wealth of knowledge in troubleshooting and resolving issues related to impedance and power delivery. I'm adept at utilizing tools like AutoCAD, Multisim, Proteus, LTspice, PSpice in my work to simulate and accurately diagnose potential errors. In addition to my technical expertise, I am committed to providing top-quality solutions within set deadlines. Being ranked among the top 3% Preferred Freelancers speaks volumes about my dedication towards exceeding client expectations. Let's collaborate on this project and transform your touch PCB into a robust and functioning piece!

@hayteekeys

Hello, I am a Researcher in Electrical Engineering with specialization in Control Systems (Linear and Nonlinear Control Systems). I have Bachelor's Degree in Electronics Engineering. My Area of Specialization is Prodcut Designs , Prototyping, Control System & Unmanned Aerial Vehicles (UAVs) and My Major skills are PCB design, Arduino, c/c++ MATLAB, Simulink,FPGA Mathematics, Statistics, Numerical, Logical and Verbal Reasoning, Modeling, Design and Analysis. I am an professional embedded software and hardware designer and I have done many project using wireless modules like ESP32. I have excellent skills in these: * SHL (Numerical+Logical+Vebal Reasoning), Korn Ferry * MATLAB * Simulink * Mathematica * Logisim * Quite Universal Circuit Simulator (QUCS) i'll be looking forward to have more discussion with you on the project.

@SMBelectronics

Hello, I read the project discription, and I found this within my competence and can deliver exellent results I’m Abbas Jawadwala, Co-founder and Lead Engineer at SMB ElectroTech. With 5+ years in electronics design and hardware development, I’ve supported clients globally with everything from IoT devices to multi-layer PCB layouts. My team and I focus on reliable, manufacturable solutions delivered on time with full transparency. Here’s how we can help: 1. PCB Layouts – multi-layer, signal integrity, DFM checks 2. Embedded Systems – firmware for AVR, ARM, ESP, Arduino 3. Product Development – prototyping, testing, optimization 4. Power Electronics – converters, power supplies, efficiency tuning 5. Analog/Digital Circuits – grounding, shielding, EMC/thermal analysis What sets us apart is our client-first approach and attention to detail. I usually take on one project at a time, ensuring focus and quality at every stage. I’d be glad to learn about your goals—whether it’s performance, cost, or schedule. I’m available to start right away and can jump on a call this week to plan the next steps. Looking forward to connecting. Best regards, Abbas Jawadwala | SMB Electrotech

@debosx

I can quickly diagnose and fix your capacitive touch PCB issue on the ESP32-C3. The low-impedance pin behavior on power-up suggests either a hardware short or pin configuration problem. I will inspect the PCB, verify components, and provide the minimal fix to restore proper operation. Technical question: Which GPIO drives the touch pad, and have you measured its resistance to ground with the board unpowered? I can deliver results within 1–2 days with a clear solution.

@Amidst

Hey there! I’m Alok, A PCB, Circuit and Mechanical designer with a passion for turning ideas into rock-solid, high-performance circuit boards. even expert on Python, C, C++ With nearly a decade of experience, I’ve tackled everything from compact consumer gadgets to complex industrial systems—always with a focus on precision, efficiency, and reliability. # Schematic & Layout Design – Clean, optimized, and manufacturable. # Component Selection & Library Management – No surprises, just the right parts for the job. # Reverse Engineering – PCB cloning, replication, and improvements. # Gerber, BOM & CPL Generation – Ready for seamless production. # DFM & DFA Expertise – Because great design means smooth manufacturing. # Multi-Layer, Flex, & High-Density PCB Design – Whatever the project needs. If you need a PCB and Code that’s efficient, reliable, and built for real-world performance, let’s chat. I’d love to help bring your project to life!

@mahmoudkaseemeg

Hello, About your design it must be measured when touched, connect to analog pin and determine the trigger when the value achieved when touched. Will differ according to power circuut This problem can be done with 4 components only using ttp2238 capacitive touch ic sensor Have a good day

@redbrickamerica

Hello there! I am ready to diagnose and fix the malfunction in your capacitive touch PCB. With expertise in PCB design, troubleshooting, and capacitive touch technology, I will swiftly identify and resolve the unexpected behavior upon power-up. Utilizing tools like oscilloscopes and multimeters, I'll pinpoint the issue causing the low-impedance signal when it should be high-impedance. Let's ensure your PCB emulates touch interactions flawlessly. Please share the attachment for a more in-depth analysis. How are you currently handling the grounding configuration on the PCB to ensure proper signal integrity with the esp64-c3 microcontroller? Cheers, RedBrick American Engineering

@chetanc20

With your challenge of debugging a capacitive touch PCB, I'm chuffed to offer my expertise as a Senior Hardware Engineer. My 5+ years in designing and troubleshooting various electronics systems, including those employing capacitive touch technology, qualify me very well for this task. My in-depth understanding of microcontrollers such as the ESP32-C3 will be particularly helpful. I possess an excellent track record of swiftly identifying and neutralizing electronic circuit issues. Your specific problem statement - the unexpected low-impedance behavior on signal HIGH – is a bit intriguing! It would be great to start by determining if this is software or hardware-based. Perhaps, examining the firmware integrities can shed some light on this errant behavior. Moreover, I'll utilize my deep knowledge of robust design principles to assess whether there could be any trace contamination or stray capacitance affecting your board's performance. Note: I can start work immediately. Please share the design documents.

@JohnTran91

Hello My name is Tu. My name is Tran and I am a Mechatronics Engineer with over a decade of cross-functional experience in mechanical design, automation, and electrical systems; all of which have equipped me with the ideal skill-set to help you debug your problematic PCB. In my previous positions at Nidec (Japan), Vinsmart (Vietnam), and Samsung (Korea), I led teams through complex engineering scenarios where my deep expertise in electronics troubleshooting shone brightest. I must note I would need some technical info to handle your board correctly. For instance, does the problem manifest on all screen devices despite different capacitive touch technologies? Throughout my career, I have been closely involved with various industries such as automotive, aerospace, consumer electronics including smart products. This has given me a solid grasp of electronic components such as the esp64-c3 microcontroller that you've mentioned is being used in your project. So you can rest assured that I am well-versed with it and can quickly get to the bottom of the issue you are facing. Let's get in touch and let me show you how my skills can benefit your project tremendously!

@FranciscoSilvi

ESP64C3? You must mean ESP32-C3. As you can see in my portfolio, I have multiple developments with ESP32. I don’t quite understand the purpose of the touch PCB in your schematic or why it’s not connected directly to the ESP32, but I’m sure that with more details discussed over chat, we’ll be able to figure it out. Please be patient with my replies—I often take some time to work due to my workload. I hope we can work together.

@saxt3

Hello, Greetings Edan W., Good afternoon! I’ve carefully checked your requirements and really interested in this job. I’m full stack node.js developer working at large-scale apps as a lead developer with U.S. and European teams. I’m offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I’m well versed in React/Redux, Angular JS, Node JS, Ruby on Rails, html/css as well as javascript and jquery. I have rich experienced in PCB Layout, Electronics, Electrical Engineering, Embedded Systems, Signal Processing, Troubleshooting and Prototyping. For more information about me, please refer to my portfolios. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. Please respond at your earliest convenience

@CaliforniaVibe

Hello, I understand you're facing issues with your capacitive touch PCB, specifically regarding the low-impedance state when it should be high-impedance. This could stem from a design flaw or a component malfunction. My approach will involve a systematic diagnosis to pinpoint the source of the unexpected behavior. With expertise in PCB design and troubleshooting, particularly with capacitive touch technology, I can ensure that your board operates efficiently next to a touch screen. Rest assured, addressing this issue with precision is my top priority. To provide targeted assistance, could you clarify if there’s been any recent modification to the PCB layout that might impact the grounding connections? Could you clarify if there’s been any recent modification to the PCB layout that might impact the grounding connections? Thank You, THE CALIFORNIA STUDIO

@metasolve241

Hello, my name is Hassan and I am an experienced firmware developer with extensive knowledge in the field of electronics, electrical engineering, and computer science. I specialize in developing firmware for medical grade ECG devices. With previous experience developing firmware for medical devices, I have gained an understanding of the technology involved as well as the protocols required to run the device successfully. I am confident that my skillset makes me an ideal candidate for this project. My expertise includes strong software development skills such as Python, MATLAB/SIMULINK, VS Code, and LATEX which will be necessary for creating the firmware for your medical grade ECG device. Additionally I have excellent problem-solving abilities and attention to detail which will be crucial for completing the project within a month's deadline successfully. If you are interested in my services please feel free to contact me directly so we can discuss further about the project requirements and develop together an outstanding solution for you.