Coin-Operated Carwash PCB Design

@MuhammadUzair16

Hi I am an embedded systems engineer with over 16 years of experience in PCB design, Arduino-based control boards, relay driver circuits, power regulation, and field-ready wiring interfaces. I can design this coin-operated carwash controller as a clean 2-layer KiCad board within the 100 x 80 mm limit, with proper 12 V to 5 V regulation, protected relay outputs, status LEDs, labeled screw/JST terminals, programming access, and a BOM using parts that are easy to source. My approach would be to first confirm the coin slot pulse format, relay coil/current requirements, preferred terminal style, and any enclosure mounting constraints, then complete the schematic, layout, DRC checks, Gerbers, drill files, BOM, and brief assembly notes covering fuses, jumpers, and pinout. I can also review the Nano sketch interface points so the board works with the existing firmware without changes. I have designed consumer and industrial control electronics from concept through production, including rugged relay and low-voltage control boards for wet/noisy environments. Please contact me to discuss details.

@macroenergy

With a diverse skill set ranging from digital motor control to power electronics and embedded systems, I am the perfect candidate for your Coin-Operated Carwash PCB Design project. My experience with Arduino and microcontrollers combined with my expertise in PCB design and layout, specifically with KiCad and Eagle, make me well-equipped to handle the task at hand. B Apart from meeting the project outline requirements, I am dedicated to delivering high-quality results that goes beyond acceptability. You can expect more than just a DRC-clean board - you'll receive comprehensive deliverables including complete schematics, BOM with manufacturer part numbers for easy sourcing, as well as clear assembly notes to streamline future operations. One particularly valuable contribution I bring is my expertise in power regulation, which suits your need for on-board voltage regulation in this project. With a keen eye for detail, I will not only ensure the 5V safety of Nano and logic lines but also incorporate fly-back protection features and status LEDs for your relays' optimal performance. My ultimate goal is not only delivering satisfactory work but also exceeding your expectations. Whether it's using CAD files or providing Gerber and drill files for fabrication ready 2-layered PCBs - rest assured, my capacity meets your needs.

@amelectronics

Hi, I have experience in designing Circuits and can complete your project. I have expertise in the following: 1- Designing schematic and PCBA 2- Ordering the PCBA and getting boards manufactured. 3- Writing firmware for the PCBA to make sure everything works as expected. 4- I can also develop smartphone apps to communicate and control the hardware. If you wish we can discuss in chat. Thank you.

@Adeel2k14

Hi, I am an electronics design engineer with a degree from UET Taxila (2018) and extensive experience in mixed-signal, multi-layer, and industrial hardware layouts using KiCad and Altium. I will design your compact (under 100×80 mm), DRC-clean, 2-layer PCB to reliably drive the five 12V relays with robust flyback protection, status LEDs, and efficient 12V→5V buck regulation to minimize heat. Deliverables: - Complete KiCad schematics & routed PCB files - Production-ready Gerbers, NC drills, and an active MPN BOM - Clear documentation (wiring, fuses, jumper configurations) Ready to deliver a field-reliable board. Let's discuss your timeline!

@ahsanfreelancer7

Hi, Hope you are well. It sounds like a great job and aligns with where I'd like to take my career. I'm eager to learn more. I have experience over the past fifteen years as a PCB Design Engineer at Global Engineering services and RWR Private Ltd. You can visit my freelancer profile page; https://www.freelancer.com/u/ahsanfreelancer7 I’ve been consistently committed to Specific goals, skills or traits the new job entails. Could we schedule some time to discuss about opportunity in more detail? I’d welcome the opportunity to learn more about the role and share how my skills and experiences would benefit you. I’m available to talk at any time. I look forward to speaking with you. Best, AHSAN ULLAH

@hayat38402

Hi, how are you doing? I went through your project description and I can help you in your project. your project requirements perfectly match my expertise. 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:  Antenna Design (CST, HFSS)  Embedded C Programming.  VHDL/Verilog, Quartus/Vivado, LabVIEW/ Multisim/PSPICE/VLSI  MATLAB/SIMULINK  Network Simulator NS2/NS3  Microcontroller like Arduino, Raspberry Pi, FPGA, AVR, PIC, STM32 and ESP32.  IDEs like Keil MDK V5, ATmel studio and MPLab XC8.  PLCs / SCADA  PCB Designing Proteus, Eagle, KiCAD and Altium  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.

@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!

@leonidye

Hi, I am very interested in your coin-operated carwash controller PCB project. I have extensive experience designing Arduino-based control boards, power electronics, relay interfaces, and industrial embedded systems, and I can deliver a reliable, production-ready PCB tailored to your requirements. I will design a compact two-layer PCB featuring an efficient 12V-to-5V power supply, robust relay driver circuits with flyback protection, status LEDs, fuse protection, clearly labeled screw terminals, and an in-circuit programming interface. The layout will be optimized for electrical reliability, noise immunity, and ease of assembly while ensuring full compatibility with your existing Arduino Nano firmware and keeping the board within the specified 100 × 80 mm footprint. You will receive the complete KiCad project, schematic, PCB layout, Gerber and drill files, BOM with manufacturer part numbers, and assembly documentation including jumper settings, fuse recommendations, and coin-slot interface details. Throughout the project, I will provide regular updates and incorporate your feedback to ensure the final design is ready for fabrication and field deployment. I look forward to discussing your project and helping you build a dependable controller for your carwash system. Regards,

@hamzazayyad

Hello, I can design this complete car-wash vendo controller from schematic through production-ready PCB files. I am an Electrical/Electronics Engineer with 15+ years of experience in STM32, Arduino, PCB design, industrial control systems, power electronics, and automation equipment. I have designed relay control boards, motor controllers, vending systems, and custom embedded products for commercial applications. For your project I can provide: • Complete KiCad schematic • 2-layer PCB layout within the 100 × 80 mm requirement • Arduino Nano interface implementation • Coin acceptor pulse input conditioning and filtering • Runtime control logic support for the provided Nano firmware • Five independently controlled relay outputs • 12V to 5V regulated power supply section • Relay flyback protection and status LEDs • Screw-terminal/JST field wiring connectors • USB or Tag-Connect programming interface • DRC/ERC verified design • Gerber, drill, and manufacturing files • Complete BOM with manufacturer part numbers • Assembly and wiring documentation including fuse ratings and coin-slot pinout I use commonly available and easy-to-source components to simplify assembly and future maintenance. The design will be production-ready, clearly labeled, and optimized for reliable operation in a car-wash environment. Best regards, Hamza STM32 Engineer | PCB Design | Motor Control Embedded Systems & Industrial Automation Specialist

@tetianam8

A dedicated PCB will drive a self-service car-wash “vendo” unit built around an Arduino Nano. The board must accept the pulse output from a standard electronic coin slot, translate each valid coin into the required runtime, and use that signal to energise five independent relays that handle pumps, valves, or lights. All relays share a common 12 V source, yet the Nano and logic lines stay safely at 5 V, so on-board regulation (12 V → 5 V buck or linear, as you judge appropriate) is part of the layout. The relays themselves need fly-back protection, status LEDs, screw-terminal or JST headers for easy field wiring, and clear silkscreen labelling. A USB-B or tag-connect footprint for in-circuit programming is also required. Deliverables • Complete schematic (KiCad preferred, Eagle acceptable) • Routed PCB ready for 2-layer fabrication, Gerber + drill files • BOM with manufacturer part numbers and indicative pricing • Brief assembly notes highlighting jumper settings, fuse ratings, and the coin-slot interface pin-out Acceptance is based on a DRC-clean board that fits within 100 × 80 mm, uses commonly available through-hole or easy-to-source SMD parts, and uploads the provided Nano sketch without modification.

@Tmstudios

Hi, there , I am highly interested in designing your custom PCB for the self-service car-wash vendo unit! I can design a highly reliable, DRC-clean 2-layer PCB centered around the Arduino Nano that perfectly fits within your 100 × 80 mm footprint. To guarantee system stability, I will effectively reduce the 12V supply into a clean 5V using a robust step-down regulation circuit. Car wash environments generate heavy electrical noise from pumps and valves, so I will optically isolate the pulse input signal from the electronic coin slot to prevent harmful voltage spikes. I will make sure the low-voltage MCU part is fully isolated and completely noise-free by keeping a strict physical layout separation between the 5V logic lines and the high-current 12V relay traces. All 5 relays will include fly-back diodes, status LEDs, and rugged screw terminals. we can use DC-DC isolator to power , Low power part. it will effectively prevent EMF based MCU reset, freeze. Quick question: To best suit your assembly approach, do you prefer predominantly Through-Hole (TH) components, or SMD parts? I will provide all deliverables: Schematic PDF , 2-layer Gerbers, BOM, and assembly notes. DM me if you like to Continue this project with me. bye! Best Regards, Tharindu

@julianm260

As a seasoned Senior Electronics Engineer with over 8 years of experience in RF engineering, embedded systems, and high-power electronic and power-distribution design, I am confident that my skill set is an excellent fit for your Carwash PCB project. I have a proven track record of designing and delivering robust hardware solutions throughout the entire product development lifecycle – from concept to deployment. Not only have I worked extensively with Arduinos and microcontrollers like the one you'll be using in this project, but I am also adept at complete system integration – combining different modules to create seamless functioning systems. My strong background in electrical engineering has given me a deep understanding of signal processing which directly translates to my adeptness at developing intricate circuits like the one specified in this project. Moreover, my familiarity with KiCad, Eagle and ability to carefully coordinate the components' power supply requirements (like the critical 5 V vs. 12 V differential here) and appropriate board designs are skills that would greatly benefit this specific project. Finally, my proficient problem-solving skills combined with effective communication will ensure we get from schematic to functional carwash board without any hiccups. Choose me for a high-quality solution right on schedule!

@ahmedy607

Hi, I can help design this Arduino Nano-based vending controller PCB, including power regulation, relay drivers, coin acceptor interface, protection circuitry, and production-ready manufacturing files. I have experience with embedded control boards, relay-based systems, and KiCad PCB design. Please check my portfolio for similar projects. I'm ready to start immediately. Best regards, Ahmed

@ahmaddar2970

Designing a robust PCB for your coin-operated carwash system is within my expertise. I will ensure it meets all specifications, including coin pulse translation, relay control, onboard regulation, and clear labeling, following your detailed requirements. The design will be optimized for cost-effective manufacturing, use commonly available parts, and include comprehensive assembly notes. My approach guarantees a DRC-clean layout within 100×80 mm, fitting your budget of 250 CAD while providing a reliable, easy-to-install control solution. I look forward to delivering a professional, ready-to-fabricate PCB tailored to your needs. What specific safety features or certifications do you require for this PCB design?

@alluankit01

Hi, I can design the Arduino Nano-based PCB for your coin-operated self-service carwash vendo unit, including coin pulse input, 5 relay outputs, 12V-to-5V regulation, protection, wiring headers, and fabrication-ready files. The best solution is to first review the coin slot pulse format, relay load requirements, provided Nano sketch, wiring style, and enclosure/space constraints. I’ll then create a clean 2-layer KiCad PCB within 100 × 80 mm with proper relay isolation, flyback protection, status LEDs, labelled terminals, and reliable 12V/5V power handling. I’m comfortable with Arduino Nano hardware, coin pulse interfaces, relay driver circuits, voltage regulation, PCB layout, KiCad, through-hole/SMD component selection, DRC checks, BOM preparation, and practical field wiring design. Deliverables will include: * Complete schematic * 2-layer routed PCB * Gerber and drill files * DRC-clean KiCad project * 12V to 5V regulation section * 5 relay driver outputs * Flyback protection and status LEDs * Screw terminal/JST header layout * Programming header/USB-B footprint * BOM with part numbers and pricing * Assembly notes and pinout details I’ll focus on a reliable, easy-to-assemble board that works with your existing Nano sketch and is ready for fabrication and field testing. Best regards Ankit

@isurutech

Dear Sir, I would like to present myself as prospective candidate to do your PCB design. I have sound knowledge and experiences in Electronic and Programming including PCB design using KiCAD. I have read your project description and I can present my self as the best candidate to do your PCB design as my skills perfectly align with your requirements. I presume that you already have Arduino sketch written ? Will the code available to design the PCB or will you provide the pin-out and corresponding relays ? What are the current handling requirements for the relays ? Please share more details via chat so we can discuss the design further . Also please visit my profile for some of PCB designs done by me as proof of my skills. Expecting a favorable reply, I remain. Isuru Athukorala

@shenglin0617

Hi, This is exactly the type of hardware project I enjoy working on. I have extensive experience designing controller boards for industrial equipment, including power management, relay interfaces, MCU-based control, and production-ready PCBs. The board will be designed with reliability in mind—proper relay driving and protection, robust 12V-to-5V power regulation, clear field wiring, and straightforward assembly. I always consider real installation and maintenance, not just electrical functionality. As a Chinese hardware engineer with years of embedded hardware and firmware development experience, I can also review the Nano firmware if any hardware-related adjustments become necessary, although I understand your existing sketch should run unchanged. I look forward to building a reliable board ready for manufacturing. Best regards, ShengLin Gu.

@sathish8270

Hello, I am an Embedded Systems Engineer and KiCad PCB Designer with experience designing reliable embedded hardware using Arduino, ESP32, STM32, and 8051 microcontrollers. I can design your Arduino Nano-based self-service car wash controller PCB according to your requirements. What I will deliver: Complete schematic in KiCad 2-layer PCB layout (within 100 × 80 mm) 12V to 5V regulated power supply 5 relay driver circuits with flyback diodes and status LEDs Coin acceptor pulse input interface Screw terminal/JST connectors with clear silkscreen labels USB programming or Tag-Connect footprint DRC/ERC checked design Manufacturing-ready Gerber, drill files, and BOM with manufacturer part numbers Assembly notes including jumper settings, fuse recommendations, and coin-slot interface pinout I focus on clean routing, reliable power distribution, and designs that are easy to assemble and maintain using readily available components. I look forward to working with you and delivering a high-quality, production-ready PCB. Best Regards, Sathishkumar N Embedded Systems Engineer | KiCad PCB Designer

@adrianb026

Hi, ​I will design a production-ready, 2-layer PCB (100 \times 80\text{ mm}) for your car-wash unit that guarantees your Arduino Nano sketch runs without modification or freezing. Because car-wash environments suffer from severe electrical noise (EMI) from pumps and valves, I prioritize isolation and hardware reliability. ​Key Features of My Design: ​Optoisolated Coin Input: Uses a PC817 optocoupler to completely isolate the 12V coin pulse from the 5V Arduino, preventing voltage spikes from crashing the microcontroller. ​Efficient Power: Uses a high-efficiency switching regulator (Recom R-78 series) to drop 12V to 5V without generating waste heat. ​Relay Protection: Includes dedicated transistor drivers and robust 1N4007 flyback diodes to eliminate inductive kickback. ​Industrial Layout: Features wide high-current traces, physical isolation slots to prevent arcing, status LEDs, and clear silkscreen labeling for screw terminals. ​Deliverables: ​KiCad Files: Clean schematic and routed PCB layout. ​Fabrication Package: DRC-clean Gerber and drill files. ​BOM: Spreadsheet with DigiKey/Mouser part numbers and pricing. ​Assembly Notes: Brief documentation detailing fuses, jumpers, and pin-outs. ​I am an electronics engineer experienced in industrial microcontroller design and ready to start immediately. ​Best regards, Adrian