Electronică Jobs

I need a custom ELRS (ExpressLRS) solution for drone control, utilizing an STM microcontroller instead of the original MCU. Key requirements: - Improved range - Enhanced security - Dual band - Mesh networking capabilities Ideal skills and experience: - Proficiency in STM microcontrollers, especially STM32 - Strong background in RF communication and protocols - Experience with drone control systems - Knowledge of security implementations in wireless networks - Familiarity with mesh networking technology Please provide relevant experience in your bids.

I need an experienced electrician for industrial installation work. The task involves installing machinery and equipment in an industrial setting. Ideal Skills and Experience: - Experience in industrial electrical work - Expertise in machinery and equipment installation - Knowledge of safety regulations and compliance - Ability to read and interpret electrical blueprints and schematics - Problem-solving skills and attention to detail - Relevant certifications and licenses

I need a compact, reliable flex-PCB designed for an industrial setting that is subject to continuous high-vibration, ambient temp extremes, and moisture. The board’s sole payload will be an embedded vision sensor; no microcontrollers or large passives are planned at this stage. My priority is to ensure signal integrity and mechanical robustness in this challenging environment while keeping the layout as thin and lightweight as practical. Here is what I expect from you: • A short consultation (call or chat) to confirm sensor footprint data, required bend radius, connector choice and stack-up. • Schematic capture, impedance-controlled flex-rigid or pure-flex stack-up proposal, and a final layout that factors in strain-relief, tear-stops and anchoring points suited to hi...

I'm looking for an Arduino code that will trigger RGB LEDs to change color based on a pulse rotary dial input. Requirements: - Use of a pulse rotary dial - RGB LEDs whose colors will be controlled by the rotary dial input Ideal Skills and Experience: - Proficient in Arduino programming - Experience with rotary dials and RGB LED control - Familiarity with electronics and circuit design

I am putting together a self-funded, individual project that calls for a fully specified gas-chromatography system fitted with both a Thermal Conductivity Detector (TCD) and a Flame Ionization Detector (FID). The goal is to separate and quantify light hydrocarbons—specifically methane, ethane, ethylene, acetylene and closely related species—in liquid samples that will be injected directly or via headspace. What I need from you: • An end-to-end design covering column selection, carrier gas choice, oven programming and detector configuration so that both TCD and FID work in tandem without signal overlap. • A step-by-step method for sample preparation and injection that delivers sharp peaks and reliable quantitation for the compounds listed above. • Calib...

Hello , I have a cabled weather station ready to go, but I need an experienced hand with the physical installation side only. The job covers everything from mounting the sensors and console, running and securing the cable, to making sure connections are weather-proofed, grounded, and reading correctly once powered up. Brand is flexible—I simply need someone familiar with the usual hardware found in systems such as Davis Instruments, AcuRite, La Crosse, or similar. Only serious freelancer Auto bids not good Thank you

I have a cabled weather station ready to go, but I need an experienced hand with the physical installation side only. The job covers everything from mounting the sensors and console, running and securing the cable, to making sure connections are weather-proofed, grounded, and reading correctly once powered up. Brand is flexible—I simply need someone familiar with the usual hardware found in systems such as Davis Instruments, AcuRite, La Crosse, or similar. Key Deliverables • Sensors, mast, and console solidly mounted in their designated locations • All cables routed neatly, protected from the elements, and correctly terminated • Grounding and surge protection in place where required • Final power-up and verification that the station is delivering clean, sta...

I'm seeking an experienced product designer to develop an ultrasonic scent diffuser. Key Features: - Timer settings - LED lighting - Mist intensity control Ideal Skills and Experience: - Proven experience in designing consumer electronics, particularly scent diffusers - Strong understanding of ultrasonic technology - Expertise in integrating LED lighting and timer mechanisms - Ability to create intuitive user interfaces Please include relevant experience in your application.

I’m putting together a compact two–tier electronic enclosure and I need the complete assembly modelled in Shapr3D so I can open, review, and tweak the layout myself. Here’s the flow of work: • You’ll source accurate 3 D models for several off-the-shelf parts plus one OEM component. I already have its detailed specs in PDF, which I’ll forward immediately. • Once the parts are ready, you’ll position them inside a base housing roughly 10 in × 9 in × 2.5 in, then add a second enclosure that stacks neatly on top. • Please illustrate the electrical and fluid links: a triple-lumen 1⁄16″ ID umbilical running between the tiers, and wiring that ties a water-level sensor, a peristaltic pump, and an Arduino-class controlle...

I’m developing a compact medical-grade board that will sit at the heart of a new vital-signs monitor. The PCB must reliably acquire and process heart rate, blood pressure, and respiratory rate signals, then pass the data to a microcontroller for further analysis and display. Here’s what I need from you: • Complete schematic capture based on my sensor and MCU selections • Four-layer board layout optimized for low-noise biomedical signals (Altium or KiCad preferred) • Manufacture-ready Gerber files, pick-and-place data, and a clearly structured BOM with medical-grade component choices • Design reviews at schematic and pre-release layout stages so we can make sure the board meets IEC 60601-1/-2 spacing, leakage, and isolation requirements • Brief ...

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I am looking for someone to develop hardware on my request, it will be simple projects as seen on you tube. I am interested to know hourly rates, if I provide the hardware and code they would just need to wire them up. Would be nice to have someone from India NCR.

I need an expert to establish communication between two Siemens S7-1500 PLCs using OPC UA. Requirements: - Send digital, analog, and alarm signals. - Control a program on the server PLC via the client PLC. - Transmit maintenance data. Ideal skills and experience: - Experience with Siemens S7-1500 and OPC UA. - Proficiency in handling digital, analog, and alarm signals. - Strong background in PLC programming and communication protocols. Please provide relevant work experience in your bids.

I need a PCB designed specifically for a one-off project; it is not part of a commercial product line, so flexibility and creativity are welcome. The board will carry only analog circuitry—no digital sections—centred around operational amplifiers and a small signal-processing stage I will detail once we start. What I will supply: the schematic (PDF or KiCad), preferred footprints, and basic mechanical constraints. What I need from you: a clean, manufacturable layout with proper analog grounding practices, complete Gerber/ODB++ files, a reviewed BOM, and the original design file so I can revise it later if needed. Please aim for standard two-layer construction unless you advise otherwise for noise reasons. Acceptance will be based on: • DRC-clean files that import i...

The task is to design a compact PCB that drops straight into an SCX 1/32 car so it can run on a digital track. I want the board to read the track’s reed-sensor signal, let me assign any of 20 unique car IDs in firmware, and expose a surface-mount USB-C port on the edge for easy flashing once the body shell is back on. Size must stay close to the original analogue board footprint (about 24 × 18 mm, height under 6 mm) but I can adapt mounting holes or connector positions if you have a cleaner layout idea. Power comes from the standard track pickups (nominal 14–18 V DC), so include an efficient buck or LDO to feed the microcontroller and reed circuitry. I haven’t locked the MCU yet; pick anything small, inexpensive, and easy to program—ATmega, STM32, ESP32, or s...

I need a compact PCB developed for a one-off project that focuses purely on analog signal processing. The core task is to turn my hand-drawn schematic into a production-ready board, taking care of component selection, layout, and routing while keeping noise and crosstalk to a minimum. Here’s what I will hand over: • My rough schematic, functional block notes, and preferred connector footprints. • Target board dimensions and basic mechanical constraints. What I expect back: • A cleaned-up, fully annotated schematic (Altium, KiCad, or Eagle—use whichever you are fastest with). • Optimised PCB layout that respects analog best practices: short high-impedance traces, solid ground planes, and clearly separated power and signal paths. • Complete BOM with man...

I’ve drafted a single-layer board in Altium Designer and now need a seasoned set of eyes to run thorough simulations before I commit to building the first prototype. Your task is to import my project, verify the stack-up and component models, and perform all relevant electrical, thermal, and rule-check simulations available in Altium. Key goals • Confirm that signal integrity and power distribution meet design intent. • Flag any DRC or manufacturing issues early so I can correct them before fabrication. • Produce a concise simulation report summarizing the tests run, key plots or screenshots, and your recommendations. Deliverables 1. Updated Altium project files with all simulation settings preserved. 2. PDF or DOC report of findings and suggested fixes. ...

I need a detailed electrical plan for installing an EV charger in the garage of a new residential home, as required by council regulations. The home has a three-phase electrical supply. Requirements: - Compliance with Woollahra council regulations For condition 14 (Item 37) that requests “electrical plans of all off street parking demonstrating capacity for Level 2 (single phase, 7kw power) charging point” - Detailed schematics for three-phase supply - Specifications for EV charger installation in garage Ideal Skills and Experience: - Experience with residential electrical planning - Knowledge of council requirements for EV charger installations - Familiarity with three-phase electrical systems

I need a compact, production-ready circuit that brings reliable wireless communication to a new consumer-electronics device. The work begins with schematic capture and component selection, moves through PCB layout, and finishes with ready-to-manufacture Gerbers, a complete BOM, and clear test guidelines. The radio link is the heart of the design, so careful RF layout, antenna matching, and regulatory-compliant power levels are essential. Bluetooth LE is my preferred protocol, though I am open to Wi-Fi or other 2.4 GHz solutions if you can demonstrate lower cost or better battery life without sacrificing performance. Please plan on: • Delivering editable design files in Altium, KiCad, or Eagle, plus PDFs for quick review • Calling out any critical components with long le...

I need a concise Python 3 script that will run on a Raspberry Pi 5 and do the following: • Watch a single GPIO input line for the HIGH digital signal coming from my Sony camera’s built-in AI output. • As soon as that digital signal is detected, drive a separate GPIO output that energises a small 5 V solenoid for five seconds, then automatically switch it off. • Debounce or otherwise ignore any further triggers until the five-second period is complete. The camera only provides a digital signal, so no protocol parsing is required—plain HIGH/LOW logic on the GPIO pin is all I need. The trigger itself must use the Pi’s native GPIO header rather than USB or networking. I haven’t fixed the exact GPIO numbers yet; feel free to suggest sensible default...

I’m updating the firmware for an STM32-based design and need an experienced C++ developer who is comfortable inside STM32CubeIDE. The codebase already compiles and runs on the microcontroller, but several features still require clean, well-structured implementation, performance tuning and thorough testing directly on the hardware. You’ll be working exclusively with STM32 microcontrollers; no FPGA or other targets are involved. Please be ready to pull the current CubeIDE project from my repository, build it as-is, and then extend it in C++17 (or later) while respecting the existing HAL layer and project structure. Deliverables • Updated CubeIDE project with the new or fixed functionality fully integrated • Clear build instructions and a short change log so I can ...

I'm seeking an experienced designer to create a 12V electrical panel for installation on the interior of a canopy. The panel will power lights, a fridge, and charging ports. Key requirements: - Incorporate a fuse box and circuit breakers for protection - Design must fit securely and function efficiently within the canopy interior Ideal skills and experience: - Expertise in 12V electrical systems - Experience with designing electrical panels - Knowledge of safety standards and protection mechanisms

I need a Zigbee Green Power device for indoor lighting control. The primary features required are on/off switching and dimming. Key requirements: - Zigbee Green Power technology - Indoor installation - On/off switching and dimming capabilities Ideal skills and experience: - Familiarity with Zigbee technology - Experience in lighting control systems - Electrical installation knowledge for indoor environments

The embedded system comprises 2 STM32 boards connected to their own 7 sensors, 1 motor, and 3 relays. Each is connected to a central Raspberry Pi 4 board. The RIGHT STM32 board also has a TFT ST7789 2inch display. The Raspberry Pi has its own 5-inch display (connected via HDMI) and is connected to a battery BMS via UART and controls the main ON/OFF switching of the exoskeleton system driven via a 48V 10A relay. The Raspberry Pi also controls the operation of a 5V air-pump via a relay able to deliver 1.5A. 1. Graphical user interface (GUI) developed for the STM32 to drive the ST7789 display. The detailed requirements for this GUI are presented in Figure 3. 2. GUI developed for the Raspberry Pi display. The detailed requirements for this GUI are the same as for STM32. 3. Software for...

I’m kicking off a series of manufacturing-plant automation upgrades and I need a seasoned controls engineer who can run each project from the first I/O list through customer hand-over. You’ll design, program, and optimise complete PLC, SCADA and HMI architectures, keep schedules and costs on track, and be the face of technical support for the plant team once we go live. What the work looks like • Project scope reviews with our operators and maintenance crew • Writing and testing PLC logic, building SCADA dashboards and HMI screens, then carrying that code through FAT, SAT and on-site commissioning • Coordinating panel builders, electricians and any specialty subcontractors while managing the overall timeline and spend • Driving QA/QC for every drawi...

I’m building a brand-new tracker aimed at hunters and other outdoor enthusiasts who need to see the location of their harvested game is in real time. The core requirement is straightforward: reliable location tracking that appears instantly on a smartphone and must be as small and light as possible. The idea is that a bow hunter can easily track and find their game after a shot is taken. This would ideally be the most ethical form of locating an animal to ensure that it is not gone to waste. Here’s the functionality I have in mind: • The device gathers GPS coordinates, pushes them to the user’s phone over low-energy Bluetooth, and refreshes quickly enough to feel truly live. • When Bluetooth isn’t possible or range is lost, a secondary short-range...

I need help recalibrating a Linak linear actuator LA36. The actuator is experiencing inconsistent movement during both extension and retraction. I’ve already checked the power supply and inspected the wiring connections, but the issue persists. Ideal skills and experience: - Experience with Linak actuators, particularly the LA36 model - Strong troubleshooting skills in linear actuators - Electrical knowledge to identify and fix calibration issues

Project: ESP32-Based Talking Plush Toy – Prototype Development Project Overview I’m building a screen-free talking plush toy for kids (3–7 years). The goal is to create a working prototype (V1) that demonstrates: Calm audio interaction Simple button & Bluetooth (BLE) control Safe, battery-powered operation This is prototype-only, not mass production. Scope of Work The freelancer will: Build a working ESP32-based prototype Implement audio playback (pre-recorded voice files) Support button-based triggers Implement BLE connectivity (basic commands from phone) Ensure safe power & insulation for a prototype Share code + wiring diagram + build instructions Core Features (V1) ESP32 dev board Pre-recorded audio playback (stories, phrases) 1–2 physical buttons BLE co...

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I need an ebike throttle limiter that sits between the ebike throttle ( running 5v red, black (gnd) and white control wire and its controller : (DO NOT CUT these) Throttle RED (+5V) ------------------------------------ Controller RED (+5V) Throttle BLACK (GND) ------------------------------------ Controller BLACK (GND) (ONLY cut/switch the WHITE signal) Throttle WHITE (signal) ----+-----------------------------> Switch T1 | +----[ Rseries 1kΩ ]----+-----> Switch T2 = LIMIT NODE | +-----> Pot BLACK (wiper) Pot RED ---------------------------------------------> Controller...

I need an industrial engineering specialist with experience to help me write the case studies assignments I have for my PhD classes, due to work I will not be able to wrire them myself but I will provide all the key topics and details

I'm looking for somebody who can fix my pcb, all it has are leds on top

我想用一块 ESP32 搭配 INMP441 数字麦克风和 MAX98357A 扩音模组，做一个能“听得懂、说得出”的小型语音 AI。场景非常基础：与人进行简短对话，并可通过语音指令开关雾化模块即可，不需要复杂的物联网整合。 核心功能 • 语音识别：本地或云端均可，只要稳定； • 语音合成：中文语音播放，音质无需高保真； • 故障检测：当雾化模块或语音链路异常时给出语音或串口提示。 期望成果 1. 可直接烧录到 ESP32 的完整源码（Arduino IDE 或 ESP-IDF 均可）。 2. INMP441、MAX98357A、雾化模块的接线图与电源注意事项。 3. 简易指令表（如“开始雾化 / 停止雾化 / 查询状态”）及触发话术。 4. 编译、烧录与测试步骤说明，确保我按步骤即可复现。 若你能提供额外的调音参数、噪声抑制建议或 OTA 升级预留接口，我也非常欢迎。

I’m building a smart irrigation setup that links a Raspberry Pi edge server with several ESP32 nodes in the field. Each ESP32 gathers data from soil-moisture probes, compact weather boards (temperature, humidity, barometric pressure), and inline flow meters, then reports everything wirelessly to the Pi for processing. Here’s what I need from you: • Python (Raspberry Pi) and MicroPython/C++ (ESP32) code that ingests the raw sensor streams, pushes them through an on-device model, and decides—within seconds—whether to start or stop the main pump and which solenoid valves to open. • An ML pipeline: training notebooks, a lightweight model (TensorFlow Lite or similar) and the inference wrapper that runs locally. The model must act on current soil-moisture rea...

I’m developing a proof-of-concept that relies on Frequency Modulated Continuous Wave (FMCW) signals and need an experienced signal-processing engineer to turn my raw mixer outputs into actionable information. The scope covers the full digital chain—calibration, windowing, FFTs, range-Doppler generation, and target extraction techniques such as CFAR or similar adaptive thresholding. Code may be written in MATLAB or Python; please keep it modular so I can swap parameters and integrate rapidly with my existing acquisition software. To keep expectations clear, here’s what I would like handed over: • Well-commented source code that processes sample FMCW data from raw time-domain files through to range-Doppler (and, if practical within schedule, angle) outputs. • ...

Necesito plasmar en una sola placa todo el sistema de control para seis tiras LED RGBW independientes basadas en el driver 2415F (protocolo de 2 hilos: Data + Clock). La idea es utilizar el módulo WT32-ETH01 —un ESP32 con Ethernet integrado— como cerebro de la solución, de modo que pueda gestionarse vía red local. Busco a alguien con experiencia intermedia demostrable en diseño electrónico y creación de PCBs que pueda: • Diseñar el esquema eléctrico incorporando el WT32-ETH01, las seis salidas de señal (Data y Clock por tira), la etapa de potencia necesaria para cada canal RGBW y la circuitería de protección. • Rutear la PCB procurando buena distribución de alimentación y se&n...

I'm seeking an experienced PLC programmer to convert my existing SLC500 process control system to a Click PLC. The SLC500 is obsolete, and I need to ensure continuity in process control with a modern solution. Key Requirements: - Migrate all existing code and logic from SLC500 to Click PLC. - Ensure that the Click PLC can replicate all current process control functionalities. Ideal Skills and Experience: - Proficiency in both SLC500 and Click PLC systems. - Strong background in process control automation. - Experience with PLC programming and code migration. - Attention to detail to ensure no loss of functionality during the transition. Please provide examples of similar work done and ensure you have the necessary skills to handle this migration seamlessly.

Project: We are a looking for a very specific person, an actuation expert who has the following experience and credentials: - Is technical. Has himself or herself designed high-performance actuators. - The above experience must include VCMs (voice coil motors), e.g. for moving lens groups. - You must have commercial experience in a tier-1 consumer electronics company. An ideal person would be someone with 10+ years of experience, who now does freelance expert consulting (e.g. has retired or is semi-retired). If you are in the 0.1% of people who fit the above description, please continue reading. If not, there is no need (we will screen out candidates who are not a fit, you will just be using up your and our time). We have a need to evaluate smallest-possible VCM (or other actuators) fo...

I already have a working ESP32 design in KiCad and need it brought to its final, production-ready form for a commercial product that must clear CE. The job centres on three key changes: swapping the Micro-USB for a USB-C connector, integrating a Li-Po charging IC, and tweaking the board outline and component placement so everything fits a new enclosure while preserving optimal antenna clearance, decoupling, and thermal performance. Please keep manufacturing constraints in mind and pass every KiCad DRC before delivery. Timeline is tight three days from award so I’m looking for someone who can move quickly yet meticulously. Deliverables • Updated KiCad project (schematic and PCB) • Fabrication package: Gerbers, drill files, BOM, and pick-and-place (CPL) ready for PCB...

I need help building a working prototype of a small interactive toy. The prototype requires: A pop-up mechanism (using solenoids, springs, and/or small motors). Integration with Raspberry Pi or Arduino for control. Wiring/programming to operate the mechanism. A simple phone/web app to trigger the toy remotely. Requirements: Experience with mechanical design and prototyping. Hands-on skills with Raspberry Pi/Arduino electronics. Must show past project work (photos, CAD, or GitHub). Signed NDA. Deliverable: A working physical prototype (not just design files) that demonstrates the pop-up mechanism controlled by Raspberry Pi/Arduino. Budget: Budget will be discussed based on scope and experience. Please provide: What’s your estimated cost? How did you arrive at that numbe...

I am looking for an experienced RF hardware designer to consolidate and miniaturize an existing RF system based on a MYIR Zynq-7020 board. The current setup includes: 1. MYIR Zynq-7020 board (fixed, no redesign) 2. Adapter board 3. Two separate RF transmitter boards The goal is to integrate the two RF boards and the Adapter board into a single compact adapter board, while keeping the existing electrical interfaces to the MYIR board unchanged and minimizing or avoiding FPGA/firmware changes as much as possible. Scope of Work (High Level) - Integrate two RF transmit chains on one board - Use a shared reference oscillator and PLL for both RF paths - Replace discrete RF filters with compact off-the-shelf RF filters - Replace legacy power regulators with modern, small LDOs - Add RF routing op...

I’m building a mini ventilator—an embedded medical device combining mechanical and electrical subsystems—and I’m looking for a dependable partner who can translate detailed specifications into working hardware and firmware. Your responsibilities will include hardware design, firmware development, and end-to-end integration and testing. How we’ll work: • I’ll provide clear, itemized requirements; you’ll convert them into schematics, PCB layouts, and clean, well-documented firmware. • We’ll maintain a tight feedback loop with regular progress updates, clarification where needed, and rapid iterations after reviews. • Accuracy, reliability, timelines, and strict confidentiality are non-negotiable. Expected deliverables (as appli...

You will be living and have the right to work in the UK. We need a skilled electrician to upgrade and complete several control panels across multiple sites in London and Southampton so you will be mobile and have your own tool kit. Key tasks include: - Finish wiring control panels to 3-phase pumps - Wire control panels from scratch - Swap out a PLC on-site in Southampton, converting inputs from 0 to 24V - Full testing and commissioning after wiring Ideal skills and experience: - Electrical engineering background - Experience with 3-phase systems and PLCs - Ability to upgrade and wire control panels - Proficient in testing and commissioning electrical systems Please provide relevant experience and a timeline for completion.

I’m building a small bionic butterfly that “flips” in mid-air, powered by an ESP32-S3 Super Mini. What I still need is the full control system: firmware for the board plus a cross-platform mobile app that drives two micro-servos through a joystick interface. Here’s the flow I’m picturing: • The ESP32-S3 runs custom firmware (Arduino IDE or ESP-IDF—whichever you prefer) advertising itself over BLE. • The mobile app—working on both Android and iOS—connects, shows a virtual joystick, and streams position data in real time. • The board translates that data into precise PWM signals so each servo can beat the wings smoothly and synchronously. I will supply the hardware (ESP32-S3 Super Mini and servos) for your testing if nee...

I would like a full TFET study carried out in Cogenda Visual TCAD that covers both 2-D and 3-D device representations. My end goal is to arrive at a structure—and a small demonstration circuit—whose operating point clearly illustrates ultra-low power consumption. Here’s what I need from you: • Build the TFET geometry in the tool, choose appropriate materials and doping profiles, then sweep critical design parameters until the device meets a low-power operating target (sub-threshold swing and leakage will be the key figures I’ll look at). • Run complete electrical simulations in 2-D first, then extend the validated setup to 3-D so I can compare dimensional effects. • Supply all Cogenda project files, meshes, command scripts, and export any pl...

I need an experienced PLC programmer to develop a process control system using ABB AC500 PLCs. The programming should be done in Ladder Logic (LD). Key Requirements: - Expertise in ABB AC500 PLCs - Proficient in Ladder Logic (LD) - Experience with process control systems Ideal Skills: - ABB certification or equivalent experience - Strong background in industrial automation - Problem-solving and debugging skills Please provide relevant experience and any certifications.

I have a finished KiCad PCB layout and now need a clean, print-ready PDF compiled from it. The final document must contain six A4 landscape pages arranged in this exact order: 1. Copper Top Layer 2. Copper Inner Layer 1 3. Copper Inner Layer 2 4. Copper Bottom Layer 5. Component Placement Top Layer 6. Component Placement Bottom Layer Resolution has to be crisp enough for both close-up review and high-quality printing. I’ll provide the KiCad source files as soon as we get started; you simply export each required layer, keep KiCad’s default rendering colours, and merge them into a single PDF. I’ve attached a previous example—please note the labels are mirrored on that file due to an earlier issue, so yours should read correctly. Deliverable • O...

FM-transmitter for 433 MHz (BFR93W transistor, electret mic front end, bias and tank network). What I need now is a compact, production-ready layout inside a 13.5 mm circular, 2-layer board that I can share with a PCB house without further edits. Everything will be done inside an EasyEDA Shared Workspace; once you send me your EasyEDA username I’ll make you an editor so you can work directly on the live project. The priority is to minimise interference while respecting the strict size limitation, critical component placement around the RF path, and tight signal-routing clearances. If you’re used to controlled-impedance traces, short RF loops, and grounding tricks on tiny boards, you’ll feel right at home. Deliverables I expect at hand-off: • Finalised EasyEDA desig...

I have an air-quality monitor prototype on breadboard and now need a production-ready PCB. The core of the board will be an Arduino Nano, linked to Wi-Fi for cloud logging and OTA updates. Only a particulate-matter sensor has to be integrated at this stage, but I’d like the layout to leave space and headers so a future gas sensor can be dropped in without a full redesign. What I expect from you: • Complete schematic, PCB layout and clean routing for the Nano, Wi-Fi module, particulate sensor, regulated power path (USB-5 V input and Li-ion option), plus an on-board antenna or footprint. • Clearly labelled break-outs for I²C, UART and an SPI port, and pads for an optional 0.96" OLED or similar display. • All design files (KiCad or Altium), Gerbers, dr...

I’m putting together a compact desk ornament that spins on command, and I need a complete PCB solution to drive the rotation reliably. The ornament will only move when a small switch is flipped—no sensors, no remotes, just simple manual control feeding a quiet motor. Main Features: • main power source is 5V from USB to DC power jack connected to board via JST-PH cable 2pin socket. • 3.7V 800mAH Lithium chargeable battery as backup power source, connected via JST-XH cable. • 3-way SPDT switch(on, off, timer) connected to the PCB via a JST-XH cable. • 3V DC motor with peak current around 3A, connected to board via JST-PH(2pin) • 2 mounting points (M3 size to allow M2.5 bolts) Here’s what I’m after: • Schematic and PCB layout for a ...