Microcontroller jobs

...continuous monitoring so I can see where the laser head is at any moment and receive automatic alerts if something drifts out of spec or a component misbehaves. Ideally, the receiver will take positioning data straight from the board, process it with minimal latency, and expose a simple interface—serial, USB, or another protocol you recommend—so the data can be displayed live on a host PC or microcontroller dashboard. Reliability is critical, so built-in error detection should cover signal integrity, unexpected motion, and any other obvious fault conditions you identify during development. Deliverables I’m expecting: • Hardware design (schematic and BOM) for the receiver • Firmware or embedded code that handles positioning feeds, real-time monitori...

...the NFM transmission, recovering the baseband signal, and demodulating the **AFSK/FSK data used by SAME (Specific Area Message Encoding)**. The module shall cover the complete signal chain: **Antenna/RF Input → RF Filtering → VHF Receiver → NFM Demodulation → Baseband Conditioning → AFSK/FSK Demodulation → Digital DATA_OUT** The final output shall be ready for connection to an external microcontroller that will implement the SAME protocol decoder. Implementation of the complete SAME message parser and earthquake alert logic is outside the scope of this development. --- ## 2. RF REQUIREMENTS ### 2.1 Frequency Primary operating frequency: **162.425 MHz** The design should preferably support software/configuration-based tuning across: **162.4...

...4 V** → Charger OFF → 9 V adapter disconnected again The system should then remain OFF until the battery falls back to **7.2 V**. In other words: **7.2 V → ON → 8.4 V → OFF → 7.2 V → ON** This requires proper **voltage hysteresis**. ## Circuit Requirements I would like a **hardware-only solution**, preferably using: * Voltage comparator with hysteresis * MOSFET-based switching * No microcontroller * Low standby/battery consumption * Proper protection against backfeeding * Stable operation without rapid ON/OFF oscillation * Reliable switching of the **9 V / 1.5 A adapter** * Proper gate drive for the MOSFET * Appropriate filtering/decoupling The design should be suitable for **real hardware production**, not just a theoretical simulation....

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I'm seeking an experienced circuit designer to create a digital control system for a Bi Color LED Matrix. The core component of this system will be a microcontroller that can add good sound quality designed by software in which each LED will have a sound frequency. Key Requirements: - Design of an LED Matrix of 25 columns and 6 rows - Integration of a microcontroller and some quality sound. - Application focused bluetooth control systems iphone and android Ideal Skills and Experience: - Expertise in digital circuit design - Proficiency with microcontrollers - Experience in control systems for bluetooth iphone , android applications. Please provide examples of similar work.

IoT Cloud Solution Requirement We have developed a custom PCB-based IoT device consisting of an ESP32 microcontroller, an EC200 GSM (4G) module, an SCD30 sensor for measuring CO₂, temperature, and humidity, and a 5-inch display that shows these sensor readings in real time. We require a complete cloud-based IoT solution for approximately 100 deployed devices. Each device should securely transmit its sensor data to the cloud over the GSM network. The cloud platform should store the data, provide APIs for a mobile application, and support a Grafana dashboard for real-time monitoring and historical analysis. The solution should include secure device communication (MQTT or HTTPS), cloud data storage, user authentication, device management, real-time dashboards, historical reports, al...

I need a compact, production-ready PCB that accepts a single DC input and delivers three regulated rails—24 V @ 12 A, 12 V @ 12 A and 5 V @ 10 A—for an industrial-automation control panel. The board must keep those rails alive for roughly 5-10 minutes by automatically switching to a lithium-ion battery pack whenever the main supply drops. An onboard 8051 microcontroller will continuously sense input power, drive status LEDs and, when a brown-out is detected, shut the rails down in a defined sequence after the battery grace period. I will flash the MCU here, so please include well-commented source, compiled HEX and a simple serial or GPIO interface for configuration. Electrical safeguards are critical in the factory environment, so integrate robust overcurrent, over...

...has hardware/electronics building experience. We're looking for a freelancer who can act as a hands-on mentor for the hardware and coding side, not just a builder — someone who will walk us through each step and explain it, since we're complete beginners in this specific area. Phase 1 scope (this posting): Guide us through wiring a basic glove prototype: flex sensors + IMU connected to a microcontroller (Arduino/ESP32 or your recommendation) Get the hardware reading clean, reliable sensor data Basic coding to turn that raw data into recognised output for a small set of signs (a handful of Arabic Sign Language letters/words as a starting vocabulary) Teach us why each step works as we go What we're looking for: Electrical/embedded systems engineer experienc...

...on final materials—metal, plastic, or a hybrid—so long as the finishing feels premium and stands up to daily use. While the patent text outlines baseline behaviour, I’m willing to explore value-adding features such as fingerprint recognition, keypad or app-based remote access if they can be delivered within a single prototype iteration. I’m relying on your experience to recommend the best microcontroller, sensors, and power strategy to keep the lock compact yet secure. Deliverables • Complete mechanical CAD of the lock body and internal mounts • Production-ready PCB layout, Gerber files, and BOM • Firmware source code with inline documentation • Assembled, fully functioning prototype shipped to me • Short video demo and a...

I have a new consumer-electronics concept ready for its first hardware iteration and I need a clean, production-ready PCB schematic drawn up as fast as possible. The board will bring together a main microcontroller, several peripheral sensors and a dedicated power-management section, so the schematic must clearly show all signal, data and power lines with proper decoupling and protection. You’re free to work in Altium, KiCad or another mainstream EDA package—what matters most is that I receive editable source files along with standard manufacturing outputs. Please design with component availability in mind and follow good EMC practices; this project is headed straight into a quick prototype run, so a tidy BOM and logical part choices are critical. Deliverables • E...

Looking for an expert Hardware & RF Layout Engineer to design a single, ultra-low-power, multi-radio handheld communication device. The entire project must be designed natively in KiCad (v7 or v8). The final deliverables must include complete native KiCad source files and automated SMT production exports. All primary ICs, modules, and antennas have already been finalized and ...device. The entire project must be designed natively in KiCad (v7 or v8). The final deliverables must include complete native KiCad source files and automated SMT production exports. All primary ICs, modules, and antennas have already been finalized and sourced from Mouser. No high-speed DDR memory routing or complex Linux HDI microvias are required for this project. The design uses an all-microcontroller...

I’m developing a microcontroller-based embedded system that will sit inside a vehicle (horn-relay) and act as the central hub for sensor integration and data acquisition. The core of the job is full-cycle design and development: selecting the right MCU family, creating the schematic and PCB layout, writing the firmware, and validating that the board reliably collects, timestamps, and streams data from the relay connectivity Hands-on experience in both embedded C/C++ and practical electrical or automotive environments is essential because the design must stand up to temperature, vibration, and EMI constraints found in vehicles. Familiarity with CAN, LIN, or similar in-vehicle networks is a plus; the final board will need to forward selected sensor packets to the main ECU. Del...

...occasional hose-down while still offering stable read range and low error rates. At this stage I am open about the operating band—LF, HF, or UHF—so long as we can balance range, power consumption, and tag cost. I expect us to discuss the trade-offs early and lock the decision in before PCB layout begins. Here is how I see the work flowing: • Electronic design—from antenna matching through to the microcontroller or SoC that will parse tag IDs and forward them over a simple UART, USB, or Ethernet interface. • Firmware—clean, documented C/C++ code (Arduino, ESP-IDF, or a bare-metal toolchain is fine) that wakes the reader, captures the tag UID, applies basic error checking, and pushes the data upstream. • Weather-resistant enclosure&mdas...

...detects an unsafe situation. The alert must be sent over GSM as an SMS that includes live coordinates so a caregiver can locate the user immediately. Here is what I need from you: • Complete, well-commented Arduino code that integrates a GPS module for continuous position updates and a GSM module for outbound SMS alerts. • Circuit schematic (Fritzing or similar) showing all connections—microcontroller, GPS, GSM, power regulation, and tactile buttons/buzzers. • A concise bill of materials with part numbers that are easily sourced online. • Step-by-step setup instructions so I can reproduce the build and test it on a real stick. Acceptance criteria 1. The serial monitor shows latitude/longitude refreshed at least once every 5 s. 2. Pressing t...

Project Title: Custom ESP8266 MCU PCB Design (LoRa, Current Monitor, RTC, Auto-Switching Battery, USB-C) Project Overview: I need an experienced PCB designer to design the schematic, route the board, and generate manufacturing files. Hardware & Schematic Requirements: • Microcontroller: ESP8266 (e.g., ESP-12F bare module footprint). • Programming & Debugging (USB-C): o Onboard USB-C port for programming only. Power comes from primary buck converter. o Integrated USB-to-UART bridge IC (e.g., CH340C, CP2102, or similar). o Standard NodeMCU-style auto-reset circuitry (two NPN transistors connected to DTR/RTS) to allow seamless, one-click flashing from the IDE without requiring physical boot/reset buttons. • Specific Pin Mapping (STRICT REQUIREMENT): o D0 (GPIO16)...

...batteries, with a low-battery warning pushed to the app. • Basic tamper detection (case opened or forced rotation) should trigger an alert in the app. What I expect to receive 1. Functional hardware prototype: motor drive, PCB, enclosure (3-D printed is fine for now), power system and any required sensors. 2. Firmware source code, well commented, ready for compilation on the chosen microcontroller (ESP32, nRF52 or similar). 3. A simple, clean mobile app (native or cross-platform) that pairs with the lock, shows status, and performs lock / unlock commands. 4. Circuit schematics, parts list, and mechanical drawings so I can move toward small-batch manufacturing after validation. 5. 5 copies of working prototype. I’ll be available to clarify door measurement...

...sensing kit for my PhD research. The system will be used to collect synchronized household energy, water, environmental, and occupancy data from multiple homes for AI model development. The kit should include: Energy monitoring (voltage, current, power, and energy consumption) Water flow measurement Temperature and humidity sensing Occupancy detection (PIR or equivalent) ESP32 (or similar) microcontroller with LoRaWAN communication Portable enclosure with quick-connect terminals for easy installation and removal between households LoRaWAN gateway integration Data transmission to a cloud/database (PostgreSQL, InfluxDB, or similar) Data export in CSV/API format for Python-based AI analysis The emphasis is on reliable, synchronized, research-grade time-series data, not on developin...

I am looking for an experienced automotive electronics engineer to design a production-ready controller PCB based on an STM32H7 microcontroller. This is a complete hardware design from scratch, including schematic design, PCB layout, component selection, automotive power protection and validation firmware. The controller will be used inside vehicles and must be designed for reliable operation in a harsh automotive electrical environment. It is not a hobby or basic development-board project. The enclosure and connector family are already selected. The final PCB must fit the provided Cinch automotive enclosure and connector arrangement. Main hardware requirements STM32H74x or suitable STM32H7 MCU Genuine dual-bank internal flash for safe A/B firmware updates Two native STM32 CAN F...

...device. The entire project must be designed natively in KiCad (v7 or v8). The final deliverables must include complete native KiCad source files and automated SMT production exports. All primary ICs, modules, and antennas have already been finalized and sourced from Mouser. No high-speed DDR memory routing or complex Linux HDI microvias are required for this project. The design uses an all-microcontroller architecture. ________________________________________ Core Components & Subsystems to Integrate Your design will tie the following components into a unified, functional schematic and layout: 1. Host MCU (The Brain): o STM32L4S7VIT6 (Ultra-low-power Arm Cortex-M4 MCU, 120 MHz, 2MB Flash, LQFP-100 package). Will act as the primary SPI/UART/I2C host controller. 2. NFC / Proxim...

Pcb designing and microcontroller coding

I’m building my project around an STM32 microcontroller but haven’t yet set up a development environment or written any firmware. I need an embedded-systems specialist who can guide me from first tool installation right through to a working, tested application. We’ll begin by choosing and configuring the toolchain—whether that ends up being STM32CubeIDE, Keil uVision, Atollic TrueSTUDIO, or another option you recommend—then move on to writing and debugging the firmware itself. The exact feature set (peripherals, real-time tasks, low-power modes, and so on) is still flexible, so I’ll lean on your expertise to shape the most reliable architecture for the board. Deliverables I expect: • A clean, well-commented firmware project for my STM32 &...

I am moving forward with a dedicated women-safety smartwatch and need a specialist who can turn the concept into a working prototype. The core capabilitie...in hand I should be able to: • Press a single button and have the SOS alert, live location, and audio-video feed sent automatically. • View the wearer’s position on a companion mobile or web interface. • Receive basic vitals (heart rate, steps, etc.) without noticeable battery drain. • Place an immediate call to pre-set emergency numbers directly from the watch. Please outline the microcontroller or SoC you’d suggest, the sensor stack, and any licensing needs for embedded software. If you have previous PCB layouts or enclosure designs that demonstrate similar integrations, feel free to re...

I’m building an industrial control system that brings an ARM Cortex-M microcontroller together with a Xilinx FPGA and a companion DSP on a compact, high-reliability multilayer board. The design calls for careful layer stack-up, controlled-impedance routing for high-speed buses between the MCU, FPGA and memory, as well as robust isolation and filtering for noisy factory environments. I already have a block diagram and rough pin assignments; what I need now is a complete hardware package that takes the concept all the way to production-ready files. — 6- to 10-layer schematic and PCB layout, including power architecture, differential pairs and test-point strategy — Verified design rules for 4 mil traces / 8 mil vias (or tighter if you can justify it) — Fab...

...from and now need the electronics and software ecosystem that turns them into a re-configurable display wall. Think 3 × 3, 4 × 4, 5 × 5, 6 × 6—or even larger—matrices where each module clicks together, powers up, and appears as one continuous canvas. Hardware • Design a compact PCB for each display that carries its own driver, power conditioning and a Wi-Fi-enabled microcontroller so every tile can auto-discover its neighbours. • Provide an edge connector or other simple bus so power and data can daisy-chain when the tiles are slotted into a frame. • Supply full schematics, BOM and Gerber files, plus a reference back-plane/controller if you feel a master node will simplify things. Production ready from Firmware •...

Hello, I am looking for an experienced Embedded Hardware and Firmware Engineer to design a commercial-grade Smart Dimmable LED Ceiling Light. The product must be compatible with Wi-Fi, Amazon Alexa, Google Assistant, and a mobile app. Below are the complete project requirements: 1. Hardware Requirements: • Microcontroller: ESP32-C3 (Preferred for Wi-Fi, BLE, and Matter protocol support). • Power Supply: 90V - 265V AC Input. Needs a reliable isolated AC-DC Flyback constant current driver. • LED Load: 12W to 15W LED array (SMD 2835 on an Aluminum MCPCB). • Dimming: Smooth PWM dimming from 1% to 100% without visible flicker (Zero-cross detection if needed, or direct PWM to driver IC DIM pin). • Protection: Must include Surge protection (MOV up to 4kV), over...

I'm seeking an experienced PCB designer to create a double-layer PCB layout for a consumer electronics radio device. The PCB will need to incorporate a microcontroller. Key requirements: - Double-layer layout - Integration of microcontroller - Design for consumer electronics application Ideal skills and experience: - Proficiency in PCB design software - Experience with double-layer PCB layouts - Familiarity with consumer electronics - Strong understanding of microcontroller integration Please provide samples of previous work and a brief outline of your approach.

Compact Battery-Powered Sensor PCB Design (ESP32-S3) — KiCad Preferred I'm looking for an experienced PCB designer to develop a compact, battery-powered PCB, ideally in KiCad (Altium acceptable). Core Components ESP32-S3-WROOM-1-N16R8 microcontroller 4-wire full-bridge load cell interface (HX711 or equivalent) SHT31 temperature and humidity sensor (I²C) 3-axis accelerometer (I²C) — designer's choice of part (e.g. LIS3DH, ADXL345) unless you have a preference, please propose one Rechargeable 3.7V LiPo battery, ~1000mAh, connected via JST-PH connector USB-C charging circuit with integrated battery management IC (overcharge/overdischarge/overcurrent protection required) 3.3V power regulation Power on/off switch Connector for an addressable RGB LED str...

I'm seeking an experienced KiCad user to assist with two tasks: creating footprints and designing a single-sheet schematic. Requirements: - Footprint Creation: Design custom footprints based on provided specifications. - Schematic Design: Create a single-sheet schematic, incorporating microcontroller circuits. Ideal Skills: - Proficiency in KiCad - Experience with footprint creation and microcontroller schematic design - Attention to detail and accuracy Please provide samples of previous work.

I need a layout completed for a simple 2-layer board in KiCAD. This is a battery-powered design with a microcontroller and a few digital I/O. The schematic is complete and critical components have been placed, so all you need to do is place the remaining components (preferably on the bottom side) and complete the layout/routing. Deliverable is the completed KiCAD design files with a clean DRC. We would like to see this done within a week.

I need a custom PCB that serves as the core flight-control ECU for a small drone. The board will be built around an STMicroelectronics MCU (STM32 family preferred) and must be laid out to manage all real-time stabilization, navigation and motor-drive tasks. At minimum, the schematic and layout should provide: • Microcontroller section with enough I/O and DMA channels to run full flight-control firmware • Power stage sized for the usual Li-Po pack (up to 6 S) and clean, low-noise rails for sensors and RF modules • Break-outs or headers for common communications buses—I'm open to I²C, SPI and UART, whichever you recommend for sensors, GPS and telemetry links • Motor outputs suitable for four to eight ESC signals, plus spare PWM for gimbal or ...

I'm looking for a skilled PCB designer to create a small (less than 5x5 cm) PCB for signal processing purposes. The board will need to incorporate a microcontroller. Key Requirements: - Design a compact PCB for signal processing - Integrate a microcontroller - Size constraints: less than 5x5 cm Ideal Skills and Experience: - Proficiency in PCB design software - Experience with microcontroller integration - Knowledge of signal processing circuits - Ability to work within size constraints Please provide samples of previous work and relevant experience.

I need an experienced PCB designer to take my concept all the way from a clean, well-documented schematic through to final production files. The board’s purpose is digital-only signal transmission, and it will revolve around a microcontroller core talking to several onboard sensors. Here’s what I expect from you: • A reviewed and ready-to-hand schematic with clear net naming and annotation. • Component selection focused on reliable microcontrollers and sensors; if supporting parts or alternative communication modules improve integrity, you’re free to recommend them. • A compact, manufacturable layout that respects high-speed digital design rules, proper decoupling, and clean ground referencing. • Full output package: Gerbers, drill fi...

Hardware Design Requirements I need help reviewing and completing a custom embedded controller schematic and PCB based on an ATmega328P-PU. The application details are confidential. Please focus only on the hardware implementation. Microcontroller ATmega328P-PU 16 MHz crystal oscillator ISP programming header Reset circuit 5 V, 3.3V operation Power 12 V DC input On-board 5 V regulator for the MCU 12 V rail available for loads Proper power distribution and decoupling Inputs The controller monitors six analog/digital sensing lines. Input assignments: Input A0 Input A1 Input A2 Input A3 Input A4 Input A5 These inputs are used for continuous signal monitoring. Outputs The controller drives multiple indicator groups. Required outputs: Output Group 1 Output Group 2 Output Group...

I need a seasoned KiCad specialist to turn my wearable health-band concept into a production-ready, multi-layer PCB. The board’s sole purpose is data communication, and it must do so over Bluetooth using a Nordic Semiconductor microcontroller (nRF52 family or a comparable part you can justify). You will start from my block diagram and recommended component set, refine the schematic, route the multi-layer stack with controlled impedance for the RF section, and deliver gerbers, pick-and-place, and a clean BOM. KiCad 7 is preferred so I can review your work without back-porting issues. Deliverables • Complete KiCad project folder (schematic, PCB layout, libraries) • Gerber & drill files, assembly outputs, and BOM ready for a board house • Brief desi...

The project involves modifying an existing 2-layer automotive printed circuit board (PCB) with approximate dimensions of 100 mm × 80 mm (to be confirmed after reviewing the source files). The board contains approximately 80 to 120 electronic components, including power MOSFETs, passive components, connectors, protection devices, and a microcontroller-based control circuit. The objective is to implement a series of hardware improvements while preserving the overall architecture and functionality of the existing design. The required modifications include updating the schematic to incorporate new passive components and revised values, modifying the power switching circuitry, replacing selected components, improving PCB routing in the affected areas, adjusting copper pours and cl...

...signal-conditioning, and a robust output stage ready to drop into PLC I/O (you may suggest NPN, PNP, or 4-20 mA based on best practice). • Mechanical packaging: recommendations for housing, environmental sealing, and mounting so the unit meets typical IP-rated shop-floor conditions. • Documentation: schematics, PCB layout files, Gerbers, full BOM with supplier part numbers, and any firmware if a microcontroller is used for calibration. • Prototype guidance: clear test procedures so I can verify sensing distance, repeatability, temperature drift, and EMC performance once I build the first units. Please highlight any simulation tools (e.g., Ansys Maxwell, COMSOL, LTspice) you plan to use and let me know how many design-review checkpoints you prefer, so we can ...

...during the event without opening panels or plugging in a laptop. • Safety-conscious wiring, reliable battery power for several hours of convention floor time, and quick-swap charging access. • Final delivery fully tested, with a short video walkthrough and clear maintenance instructions so I can handle minor fixes on site. Helpful experience includes animatronics, servo/motor control, microcontroller boards (Arduino, Raspberry Pi, or similar), 3D printing or lightweight CNC work, realistic fur application, and compact audio solutions. Timeline is tight: I’ll need the finished cat shipped to me in time for a rehearsal two weeks before the event. If this challenge excites you, let’s discuss your concept sketches, parts strategy and milestones so we can b...

...through a Raspberry Pi 5, packages it as MAVLink VISION_POSITION_ESTIMATE messages, and feeds it into ArduPilot. Somewhere along that path the position information degrades and the vehicle refuses to accept the estimates. I need your debugging skills to pinpoint the fault and deliver a clean, reliable flow of data all the way to ArduPilot. You’ll have full access to the C++ firmware on the UWB microcontroller and my current ArduPilot parameters. Mission Planner logs, real-time telemetry, and a reproducible bench test setup are ready to share the moment we start. Key technologies you’ll be working with include: • C++ (embedded STM32-class environment) • Python 3.x on Raspberry Pi 5 • MAVLink 2.0 message packing/parsing • ArduPilot 4.x EKF / Extern...

...budget that supports deep sleep, waking up instantly on a leak interrupt or periodically on a timer to perform a self-test and acoustic health assessment. Data must route through a cloud middleware layer via webhooks to a custom website dashboard, with critical alerts natively triggering SMS notifications. Key Hardware & Firmware Deliverables: Low-Power Firmware Development: Program the microcontroller to remain in deep sleep, waking instantly via a hardware interrupt (leak sensor) or via a scheduled monthly timer (self-test). Sensor Integration: Interface a physical leak detector and an ultra-low-power MEMS microphone (for audible or ultrasonic mechanical failure signatures) with the main board. Edge Processing (FFT/Edge AI): Implement lightweight local audio processing ...

I am looking for an experienced electronics engineer to design a schematic and a production-ready PCB for a custom hardware MIDI controller. The core of the project is based on the RP2040 microcontroller and requires handling a mix of digital inputs via I/O expanders and direct analog inputs. The final design files must be delivered using KiCad 10 (or the latest stable version). ( Very easy job: Budget 120 USD ) Project Requirements & Technical Specifications Core MCU: Raspberry Pi RP2040 (integrated into the board design, not as an external Pico module). Controls & Inputs Architecture: 24 Push Buttons: Managed via 2x MCP23017 I/O expanders over the I2C interface. 3 Slide Potentiometers: Connected directly to the native ADC pins of the RP2040. 1 Rotary Encoder: Connected...

...× 0.5" maximum Reserve approximately 20% of board space for future expansion. Power Inputs: 120 VAC 12 VDC Generator Supply Board must automatically power from either source. No batteries. Use supercapacitor hold-up circuit to maintain MCU operation during transfer (approximately 2 minutes). Use encapsulated 120VAC → 12VDC AC/DC module. Generate regulated 5V for MCU. Controller Microcontroller: ATmega328P (internal oscillator, no external crystal) Include: ISP programming header Watchdog timer Event memory (software only if possible) Relay Outputs K101 Generator Start Requirements: Dry contact only Generator provides its own 12VDC Board simply closes contacts K102 Transfer Contactor 120VAC Coil current under 1 amp Relay rated minimum 10A Inputs ...

You will receive the existing schematics, BOM, and mechanical constraints after we sign an NDA. I am flexible on the choice of microcontroller or processor as long as it offers enough I/O and headroom for future firmware updates; I’m happy to discuss ARM Cortex, AVR, PIC, or any alternative you feel best suits the job. Key deliverables: • Updated consolidated schematic • Optimised multilayer board layout with clear differential pair routing where needed

Pcb design and firmware microcontroller Pcb design and firmware microcontroller

...sensor, handle threshold logic, and trigger the alert (sound, vibration, or LED—whichever best fits the space and power envelope) • Complete schematic, PCB layout, and bill of materials so the design can be reproduced • Brief usage guide explaining calibration, normal operation, and how to adjust alarm levels I’m open to your preferred development tools—Arduino, STM32, ESP, or a custom microcontroller platform—as long as the end result stays compact and keeps power draw low enough for everyday wear. Speed matters. I’d like the first working unit on my desk as soon as possible, with interim check-ins or photos to confirm progress along the way. If you have prior experience with radiation detection hardware, wearable enclosures, or low...

...reading validated against known weights, with the method documented. 4. Simple readout: a basic phone/PC display of the live force value (a minimal app or existing BLE viewer is fine). 5. Source files: firmware code, CAD files for the shaft/handle, wiring diagram, and a short build/calibration note. ## Skills needed (ideally one person) - Embedded electronics + firmware (load cell / ADC / microcontroller, BLE). - Mechanical design / CAD + 3D printing (the sliding-shaft mechanism and sealed handle). - A mechatronics or hardware-prototyping generalist is the ideal fit. ## To include in your proposal - Similar hardware prototypes you've built (with photos/links if possible). - Whether you can handle both the electronics and the mechanical/CAD side, or only one. - Rough cost a...

...has hands-on experience designing intrinsically safe circuits. The job centres on the control system of the dispenser; the board you create must reliably manage flow-rate control while meeting the strict electrical safety demands of hazardous-area operation. Here’s what I expect from the engagement: • Develop a full schematic that integrates the pump’s sensors, valve drivers and my chosen microcontroller, then add a custom zener-barrier stage to limit energy into the hazardous zone. • Lay out a compact, production-ready PCB (Altium Designer or KiCad are both fine) observing creepage, clearance and thermal guidelines for ATEX/IECEx intrinsic-safety compliance. • Provide a verified BOM, intrinsic-safety calculations, Gerbers, pick-and-place data and...

...from and now need the electronics and software ecosystem that turns them into a re-configurable display wall. Think 3 × 3, 4 × 4, 5 × 5, 6 × 6—or even larger—matrices where each module clicks together, powers up, and appears as one continuous canvas. Hardware • Design a compact PCB for each display that carries its own driver, power conditioning and a Wi-Fi-enabled microcontroller so every tile can auto-discover its neighbours. • Provide an edge connector or other simple bus so power and data can daisy-chain when the tiles are slotted into a frame. • Supply full schematics, BOM and Gerber files, plus a reference back-plane/controller if you feel a master node will simplify things. Production ready from Firmware •...

I have an existing two-layer FR4 board that now needs a clean Rev 2 spin for a consumer-electronics application. The current schematic and PCB files (KiCad) are available; the goal is to tighten the layout, correct a few routing issues around the microcontroller, and add a properly-impedance-controlled USB interface brought out to a Type-C connector. No RF sections are involved, so the focus remains on signal integrity, power distribution, and manufacturability on standard 1-oz copper, 1.6 mm FR4. Please keep the microcontroller footprint unchanged, as the firmware team is already locked to that part. All other passives can move if it improves routing or clears DFM constraints. I also need silk updates for clearer assembly markings. Deliverables • Updated schematic a...

This project focuses on the custom PCB Design of an advanced Embedded System powered by the ESP32 for scalable IoT applications. By leveraging the ESP32 microcontroller, this IoT device delivers robust wireless connectivity and efficient processing. The comprehensive PCB Design ensures a compact, reliable Embedded System, perfectly tailored for seamless IoT integration and stable ESP32 hardware performance.

...Gerber files (manufacturing-ready) BOM (Bill of Materials) with part numbers, quantities, and suppliers Top/bottom view and 3D render images of the PCB Design files in native format (Altium / KiCad / Eagle / OrCAD) Scope Notes (Hardware Only, Unless Stated Otherwise) This is a hardware design job (schematic + layout + Gerber + BOM), not firmware. If you also do embedded firmware (C/C++ for microcontroller — MPPT logic, protection, monitoring), please mention it separately in your proposal with separate pricing — we may hire this as a second phase. Required Experience Proven prior experience designing DC-AC inverters or solar MPPT circuits at medium-to-high power levels (10kW+, ideally 30kW+ or industrial three-phase systems) Must be able to show past project p...