Microcontrollerpráce

...that will live inside an automotive environment. Its core tasks are simple control and communication duties, so the essentials are: • STM32 MCU of your choice • On-board CAN transceiver (no extra UART/SPI/I2C lines are required beyond what the MCU naturally exposes) • Pins for programming the microcontroller are to be exposed • One opto-isolated relay output rated for 230 V AC, 10 A • Taking into account the fluctuating voltage in the automotive installation when powering the microcontroller Keep the scope lean: I’m after a clean schematic, a compact 2-layer PCB layout, and ready-to-manufacture Gerber files with an accompanying BOM. A basic PDF of the schematic and PCB renders is enough for documentation at this stage. Please follow co...

I am looking to collaborate with an Embedded Systems or Electronics Engineer to design and build a wearable biosignal acquisition prototype. The goal of this project is to develop a compact, reliable system that can record multiple physiological signals simultaneously, sample them at different rates, and transmit the...biosignal acquisition prototype. The goal of this project is to develop a compact, reliable system that can record multiple physiological signals simultaneously, sample them at different rates, and transmit the data wirelessly to a computer via Bluetooth. On the computer side, the data should be displayed in real time using MATLA. The system will be based on the Nucleo-F401RE (STM32F401) microcontroller board, which will handle all sampling, timing, and wireless comm...

I need a simple digital circuit that lets my product handle basic signal-processing tasks using a microcontroller. A straightforward schematic and a concise bill of materials are all I’m after right now—I’m still at the early prototyping stage. Core requirements • Digital-only design focused on signal processing • Microcontroller-based implementation (no FPGA or ASIC) • Clear, well-labeled schematic in PDF or easy-to-share format • Basic firmware outline or sample code that shows how the microcontroller will manage the incoming signal Keep component choices realistic and widely available. If you’ve tackled similar low-power, microcontroller signal-processing projects before, I’d love to see an example.

...and automatically unlock the fridge for ~6–10 seconds** to grab a cold water. The system doesn’t need high security — just a fun, autonomous deterrent to prevent theft. --- What We Need We’re looking for someone who can: 1. Configure a **payment link (Stripe or Square)** that triggers a **Zapier or IFTTT webhook** after a successful payment. 2. Set up a **Raspberry Pi Zero W** (or similar microcontroller) to receive that webhook and trigger a **relay** to power a **12 V solenoid or maglock** for a few seconds. 3. Provide **working Python code** (Flask or similar) for the webhook receiver and relay control. 4. Help wire the lock + relay + Pi, and show how to make it boot automatically. 5. Provide a simple **test/demo setup** (LED indicator optional) so I...

...output: Continuously display the real-time O₂ percentage on a monochrome or simple-color graphic LCD, large enough to read at a glance. No touchscreen features are needed. • Alarms: – Audio: buzzer or small speaker that sounds when levels go below or above set limits. – Visual: a single red LED that blinks in sync with the audio alarm. • User-set thresholds: Set to >23.4% O2. • Microcontroller firmware: clean, well-commented code (Arduino, STM32, or similar—open to your suggestion) that ties it all together. • Deliverables: circuit schematic, parts list/BOM, compiled firmware plus source code, and a quick start guide so I can reproduce the setup on my bench. I have not uploaded code, so I may ask for a step by step or for...

I’m building a board game and need a very small, self-contained timer that players can reset with a single button press. Here’s what I’m after: • One working prototype based on any small microcontroller (Arduino, ESP32, or a comparable board—whichever keeps parts cost and footprint low). • When the button is pressed the device must start a 10-second countdown, play a steady buzzer tick during the count, and restart the count if the button is pressed again before time runs out. • At zero, the ticking stops and a distinctly different buzzer tone sounds once to signal “time’s up.” I only need the hardware and firmware for this basic proof of concept, assembled, tested, and shipped to Finland. Please include: • Example...

...accompanying Bill of Materials that match an ANSI TKL layout while offering dual-mode connectivity—wired over USB-C and wireless over Bluetooth and 2.4ghz. Functionally, the board should expose standard USB-C data and power lines, integrate Bluetooth with a reliable antenna solution, and leave enough room for an internal Li-ion battery plus charging circuitry. I don’t have a hard preference on the microcontroller, so feel free to choose whatever best balances cost, firmware support (QMK/ZMK), and availability. Deliverables • Schematic and properly-routed PCB files (preferred formats: KiCad or Altium), including Gerbers, drill files, and assembly outputs • Complete, sourcing-ready BOM with part numbers, recommended vendors, and alternates for critical i...

...(source files) - 4-layer PCB layout with proper routing - Gerber files ready for JLCPCB/PCBWay manufacturing - Bill of Materials (BOM) with LCSC/Mouser/Digikey part numbers - Pick-and-place (CPL) files for SMT assembly - 3D render/preview of the board - Assembly drawing and component placement diagram - Design files in editable format Technical Requirements Summary ESP32-S3-WROOM-1 microcontroller 1× TCA9548A I2C multiplexer (TSSOP-24) 14× ADS1115 16-bit ADC (TSSOP-10) 5× PCA9685 PWM drivers (TSSOP-28) Power regulation: LM2596 buck converter + AMS1117-3.3 LDO 50× 3-pin screw terminals (moisture sensors) 50× 3-pin screw terminals (temperature sensors - 1-Wire bus) 50× valve control outputs via 4× 16-pin headers (relay interface) U...

...into a basic working model. What I have in mind • A barometric sensor reads altitude in real time. • An OLED screen presents the altitude in large, easy-to-read digits. That’s it—no GPS, data logging, or Bluetooth for now. I just want a lean proof-of-concept that shows accurate altitude on an OLED as the pressure changes. What I need from you 1. A clean schematic and BOM for the microcontroller, barometer, battery, power supply, and OLED. 2. Firmware that samples the sensor, applies standard skydiving altitude calculations, and drives the display with a refresh rate suitable for free-fall. 3. Basic calibration instructions so I can reproduce accurate readings on my bench. 4. Well-commented code and a quick start guide so I can load firmware,...

...LED/LCD display bar will show real-time data such as: Day & time, Current screen time, Average weekly screen time, Brightness level, Volume level, Extra weight on the case (for accessories), FPS (frames per second), Wi-Fi speed - Connectivity: The indicators should work directly through a USB-C connection to the computer, without needing a separate app installation — ideally using a simple microcontroller or integrated chip that communicates with the computer’s system stats. - Design Style: Modern and minimalistic look, Matte black with subtle LED glow for data indicators, Built for premium feel and durability. Deliverables: 3D CAD model of the complete adjustable monitor case Electrical schematic for indicator integration Prototype done, assembled and tested t...

I’m building a small, wearable AI gadget and need a concise yet production-ready hardware blueprint. I already have the core components picked out—a specific microcontroller and a matching sensor—so the task is to translate these choices into a clean schematic and a tightly packed PCB layout. Key goals • Produce a clear circuit schematic that integrates the chosen microcontroller and sensor, plus the essential power-management and I/O blocks needed for a wearable form factor. • Create a space-efficient board layout (single or double layer is fine) that keeps traces short and EMI low while allowing straightforward assembly. • Supply the manufacturing files: Gerbers, drill map, pick-and-place, and a basic BOM tied to common distributors. ...

I want a wrist-sized electronic device that does one job exceptionally well: create vibrations—and let me vary those vibrations on demand based on button presses. The vibrations can have 3 differnt modes. Scope • Design the electronics: select a motor/actuator, driver circuit, microcontroller, power management, and safety components. • Build a fully working prototype that produces variable vibration patterns (intensity, rhythm, and duration) through a simple user interface such as buttons, a rotary encoder, or touch pads. • Deliver firmware that lets me adjust the vibration parameters without reprogramming; an onboard LED or small display for feedback is welcome but not mandatory. Deliverables 1. Schematic, PCB layout (KiCad, Altium, or Eagle), and ...

...repeatable vibration feedback. The vibration would have 3 patterns. Scope of work • Create an electronics schematic and concise BOM using readily available parts (vibration motor, driver, microcontroller or discreet logic, tactile button, battery management). • Lay out a simple, single- or double-layer PCB sized for minimal footprint. • Assemble and test one functional prototype that demonstrates consistent vibration on button press and stops when the button is released (or after a short programmable pulse—whichever is simpler to implement). • Provide firmware or configuration files if a microcontroller is used. • Supply build notes, component datasheets, and any 3D model or drawing needed for an enclosure so I can reproduce the unit...

...**automatically detect students when they walk through the gate**, without needing to tap a card or scan manually. The device will then **send attendance data to our cloud server** via WiFi or GSM. --- ###**Project Requirements:** **Core Features:** 1. **UHF RFID Reader (long range)** – to detect student tags (3–6 meters). 2. **RFID Tags (UHF cards or keychains)** – for each student. 3. **Microcontroller or SBC** – such as ESP32, Raspberry Pi, or Arduino-compatible board. 4. **Connectivity** – WiFi or GSM (SIM module) to send data to cloud API (we’ll provide API). 5. **Power Supply** – 12V DC or battery-based with solar option (optional). 6. **Casing/Stand Design** – slim and weatherproof gate-type stand for school entrances. 7....

...integers (exact addresses will be supplied once we start). • Refresh the display instantly whenever a new value arrives—no noticeable lag. • Retain leading zeros only when the data naturally contains them; otherwise keep the display clean. • Handle communication loss gracefully (e.g., blank the line or show “—”). Deliverables I expect 1. Schematic and BOM for the driver electronics (microcontroller, RS485 transceiver, digit drivers, power regulation). 2. Well-commented firmware source code ready to compile (Arduino, STM32, ESP32, or similar—your call, as long as it is open source tool-chain friendly). 3. Wiring diagram that matches the three-line mechanical arrangement. 4. Brief setup guide so I can flash the code and co...

...integers (exact addresses will be supplied once we start). • Refresh the display instantly whenever a new value arrives—no noticeable lag. • Retain leading zeros only when the data naturally contains them; otherwise keep the display clean. • Handle communication loss gracefully (e.g., blank the line or show “—”). Deliverables I expect 1. Schematic and BOM for the driver electronics (microcontroller, RS485 transceiver, digit drivers, power regulation). 2. Well-commented firmware source code ready to compile (Arduino, STM32, ESP32, or similar—your call, as long as it is open source tool-chain friendly). 3. Wiring diagram that matches the three-line mechanical arrangement. 4. Brief setup guide so I can flash the code and co...

...reliable). • Compatible with a refillable tank that holds standard water-based lube and can be removed for washing. • Adjustable launch strength so I can switch from a gentle stream to a playful squirt without messy overspray. • Simple, wipe-down exterior that resists lube residue. Scope of work 1. Produce a clear parts list with links to all off-the-shelf components (pump, tubing, microcontroller, housing materials). 2. Provide wiring diagrams and firmware/sketch files—Arduino, Raspberry Pi, or similar—that drive the pump via remote. 3. Build and test a working prototype, then ship it to me or guide me through final assembly with photos or video. 4. Supply basic maintenance instructions so I can flush and refill the tank safely. I’m...

Description: We are looking for an experienced PCB designer to create a compact PCB and schematic for a custom embedded system based on the MSP430 microcontroller. The project includes power management, OLED display, IMU sensor, and standard peripherals. System Overview: MCU: MSP430 Power Supply: LiPo battery input, single cell 602025 3.7V 250mAh or bigger is space allows for it. Charging via USB-C or magnetic connector Peripherals: I2C OLED display (128x32px 0.91”, preferred model: WEO012832D) ICM-20948 IMU sensor (I2C) 3x RGB LEDs Passive buzzer 4 buttons (1 reset, 3 user) PCB Requirements: Certain amount of space inside (45x23x15mm) with a specific arrangement of the OLED display, 3 buttons and LEDs (see sketches). May be necessary to split design into 2 separate PCBs. USB...

...scanners, control boards, etc.), showing how everything connects, and creating a clear plan for future assembly. This is Phase 1 – System Design Only. The physical prototype will be built later, once the design is finalized. Your Role (Phase 1 – Design Only): * Review existing 3D CAD model (provided) * Recommend components: * Motors, actuators, conveyors * RFID/barcode scanner module * Microcontroller/computer (Arduino, Raspberry Pi, etc.) * Buttons, LEDs, sensors, power supply * Create: * Wiring diagram and basic control flow * Bill of materials (BOM) with product links/specifications * Simple block diagram showing how components interact * (Optional) Sample control code or pseudocode * Communicate comfortably in English and provide progress upda...

Arduino based microcontroller programming in a professional way

I'm wanting to convert a traditional dart board into one whereby the 20 numbers (1 to 20 around the perimeter of the board) are LEDs that can move at random every 4 seconds. Based upon which number is hit I'd like to look into the possibility of the score being automatically recorded and accumulated after X number of darts have been thrown. The preference is to use real quality darts and not the electronic dart board types. I know the score accumulation is a far fetched request but will be happy with a board that has the numbers randomly move every 4 seconds, making it a test of the dart throwers eye, aim and reaction time.

...PCB design taken from concept to ready-for-manufacture files. Core requirements • Clean playback from an editable SD-card or onboard flash memory, • A reed switch put the power off/on and play the track in delay < 0.5 seconds. . No Bluetooth, no volume control button. The difficulties are in the delays and sound quality. What I expect from you 1. Prototype with a not too expansive microcontroller (<5$ pc) 3. Complete BOM with readily available components. 4. Production files—Gerber, drill, pick-and-place, and assembly drawings. 5. Native project files (Altium Designer, KiCad, or Eagle) so I can iterate later. I’ll review work in two or three iterations, focusing on component choices, board size, and audio performance. If you’ve...

...so the emergency light and fans come on automatically if smoke is detected. • Priority sequencing: purge event overrides comfort cooling; afterwards, normal comfort control resumes while respecting demand-response constraints. Deliverables I expect at this budget level: 1. Detailed block diagram and full wiring schematic. 2. Verified bill of materials with supplier part numbers. 3. Microcontroller firmware (well-commented C/C++ or Arduino-compatible) that handles sensor reading, control logic, and output driving. 4. Basic test plan so I can power up a prototype and confirm functions—including a forced purge test and smoke alarm test. 5. Short hand-off document describing expansion points (e.g., adding the optional second fan or additional AC units). If you ...

I need a basic proof-of-concept for a portable voice-recorder that is optimised for meetings and pairs with a simple Android companion app. Hardware • Suggest an affordable off-the-shelf microcontroller (Arduino, ESP32 or similar) with on-board Bluetooth. • Specify a low-noise microphone module, local storage option (micro-SD is fine) and a battery solution that will last a typical meeting. • Provide a concise schematic or parts list so I can order the components and assemble a test unit. Firmware • Record in standard WAV or MP3. • Expose Bluetooth commands for start, stop and file transfer. Android App (minimal) • Single-screen interface: start/stop recording, list stored files, download selected file to phone. • Target current...

...data transmission using an STM32F103C8T6 microcontroller. The float data consists of control commands, and we're using standard UART communication protocol. Please see the attached document. Project Requirements -A numeric keyboard must be added to the HMI interface for float data entry. -The variable sent through UART in HEX format must be interpreted according to the IEEE-754 standard by the STM32 code. -The STM32 must correctly read and parse the incoming UART data sequence from the DWIN screen without losing synchronization -The conversion function should be implemented within a global function or source file for modular usage. The purpose of this project is to send a float value entered via the DWIN HMI display to the STM32 microcontroller through UART c...

I'm looking for a medium skilled developer to implement an advanced Simon game on a QUTY microcontroller board. The game should feature score tracking and use buttons as input. Key Requirements: - Advanced Simon game functionality - Score tracking - Button-based input Ideal Skills: - Experience with QUTY microcontrollers - Game development and logic implementation - Proficiency in handling button inputs and microcontroller programming

Project Title: Smart Plant Pot (IoT-based automatic watering system) Description: I want to design and build a smart plant pot that can automatically monitor and water plants. The system should include both hardware (sensors + control board) and software (firmware + mobile app or dashboard). Main requirements: Microcontroller: ESP32 (preferred, for Wi-Fi connectivity). Sensors: Soil moisture, temperature, and humidity. Small water pump control via relay. Automatic watering logic based on soil moisture readings. Water level detection in a small tank (optional). OLED or small TFT screen to show sensor readings on the pot body. Optional: Integration with Blynk / custom mobile app to monitor data remotely. Power: Rechargeable battery or USB power. Deliverables: Working proto...

...specialist to help design and validate a motion-detection system that can operate reliably outdoors and in full sunlight. The ideal candidate will assess the feasibility of using IR-based detection (reflective or break-beam) in bright environments, recommend suitable sensor modules and configurations, and design a proof-of-concept circuit or PCB that can integrate with an ESP32 or Arduino microcontroller. You’ll be advising on both hardware design and signal reliability, ensuring stable detection without false positives from ambient light or environmental noise. Responsibilities Evaluate IR/optical sensing options for outdoor motion detection Recommend emitter/receiver models with daylight interference mitigation Design or simulate a small prototype circuit (ESP32 or ...

...well-commented code that drives a stepper motor so a load of more than 5 kg can rotate a box and hold each 90-degree position with better than ±1 ° accuracy. The system will be powered from a 12 V DC rail, so any acceleration profiles, current-limiting strategies, or micro-stepping choices have to respect that constraint. The deliverable is the complete motor-control program (C/C++ or Python on a microcontroller such as Arduino, STM32, or Raspberry Pi Pico—whichever you recommend for best torque at 12 V), along with concise setup instructions and pin mapping. Your code should include: • Initialization of the driver and any required libraries • A simple API: rotateClockwise90(), rotateCounterClockwise90(), and stop() • Homing logic to guarante...

...effects. Here’s what matters most to me right now: • Motor control – Forward / reverse, smooth acceleration, and over-current protection for a 12 V brushed DC motor • Lighting system – Headlights, indicators, and brake lights with simple PWM dimming • Sound effects – Triggered horn and engine sounds driven by a small on-board audio amplifier and speaker output You can choose the microcontroller and driver ICs you prefer but I prefer esp32 module or soc and bts 7960 or better, as long as they’re easy to source and well-documented. I’ll need the full schematic, BOM, PCB layout, and Gerber/NC drill files so I can go straight to fabrication. A brief test procedure that shows how you verified motor, LED, and audio funct...

I’m preparing a new electronic product for mass production and need a s...alternates • Fully documented firmware source code implementing the wireless stack, configuration interface, and production test hooks • Programming/test fixture guidance so the contract manufacturer can flash and verify each unit on the line • Brief design report outlining critical design decisions, antenna layout considerations, and compliance notes (FCC/CE prep) I have not locked in the microcontroller yet, so if you have a strong preference that balances cost, availability, and performance for the wireless requirement, I’m open to your expert recommendation. Expect clear, prompt feedback cycles and rapid prototype tests on my side so we can converge quickly and hand the f...

...Digital-to-Analog Converters (DACs) • A Howland Current Pump topology If you have a more elegant approach that still meets the accuracy requirement I’m open to hearing it, but the solution must remain feasible for small-batch assembly. Deliverables • Complete walkthrough of how to connect components to FPGA • Verilog/VHDL code for the FPGA, including a simple register map that lets a microcontroller or PC set each channel’s current (positive or negative) and trigger synchronous updates. • Well-commented simulation files showing stability of the analog loop and timing closure in the FPGA. I will provide the desired mechanical outline for the board and the mA ranges per channel once we start. Your expertise in precision analog layout, ...

Looking for someone to program an ESP32-S3 microcontroller for a prototype project. All hardware components are ready — you’ll only need to handle the firmware programming and module integration part. More details will be shared privately with shortlisted freelancers. Skills Required: ESP32 programming (Arduino IDE or ESP-IDF) Embedded systems / IoT experience Basic sensor and communication module integration

...architecture that links these sensors to our existing IT backbone—preferably over PoE or secure Wi-Fi—so readings land in our SQL Server and Grafana stack in real time. • Develop the middleware or lightweight API that lets our nurses’ station dashboard show live occupancy, patient-movement alerts, and historical analytics. • Provide a clean hand-off package: wiring diagrams, firmware or microcontroller code, annotated source for the integration layer, plus a short admin guide. Acceptance criteria 1. A bench test that proves detection accuracy within ±1 s of physical movement. 2. Data packets must hit our test database with <100 ms added latency on our LAN. 3. Documentation passes a peer review by our in-house IT team. I’m ha...

I have a working but imperfect product built around a PIC microcontroller. A handful of software-level bugs are still lurking, and the communication interface occasionally misbehaves, so I need the firmware tightened up and a few user-visible features polished. The current codebase was developed in MPLAB X with XC compilers, and the hardware is locked in, so the focus is strictly on PIC-side fixes. Your job is to trace and eliminate the software-related faults, stabilise the communication layer, and then refine the small feature tweaks already outlined in the source comments. Deliverables • Clean, well-commented source code that compiles without warnings • A concise change-log explaining every modification • Bench test evidence (logic analyser screenshots or s...

...**clean Work Requirement Document (WRD)** you can hand over directly. It includes pin mapping, software features, deliverables, and acceptance criteria. --- # **Work Requirement Document (WRD)** **Project:** Custom Visual Programming IDE for ESP32 DevModule with CH340C **Client:** MY STEAM LAB **Developer:** [Name/Company] **Date:** [Insert Date] --- ## **1. Hardware Specification** * **Microcontroller:** ESP32 DevModule (with CH340C USB-serial chip) * **Peripherals & Sensors:** * LDR (Light Dependent Resistor) → IO34 * IR Sensor → IO35 * Temperature Sensor (Data) → IO32 * Ultrasonic Sensor: * Trigger → IO33 * Echo → IO32 (shared pin with Temp data – must be handled in software) * Touch Sensor → IO12 * OLED Dis...

...example output (trajectory plot screenshot or sample data). Timeline for both hardware setup and code delivery. Notes: I am not asking for a full finished product—just the proof-of-concept hardware and the complete algorithmic and Python side. Strong preference for Python (pandas/numpy/matplotlib) only. If your method can be partly accelerated or cleaned up by processing/filtering on the microcontroller (e.g., bias compensation) before logging, you can implement and document that too. If you have modifications or suggestions that would further improve the practical utility or accuracy (especially for indoor/IMU-only use), feel free to mention them in your proposal....

...converter will be digitally controlled by a virtual Arduino microcontroller programmed in C. A key feature of this project is the use of optocouplers for isolated gate driving of the power MOSFETs. Functional Description Power Stage: The core of the circuit is a two-phase (2-leg) interleaved buck converter. This topology uses two buck converter circuits operating in parallel and out of phase. This approach helps to reduce the input and output current ripple, decrease the size of required magnetic components, and improve transient response compared to a single-phase converter. Control Unit: A virtual Arduino Uno board will serve as the brain of the system. You will need to load your custom C code onto this virtual microcontroller to generate the precise Pulse Width Modula...

I’m looking for a seasoned C++ developer to help add features to MIDI controller / sequencer code. The microcontroller is a Teensy 4.1 with an 8 bit TFT screen, encoders and buttons. I am looking to add a MIDI clip launching feature. Scope • Implement a responsive performance mode with low-latency note triggering, tempo-sync’d clock, and real-time parameter tweaking. • Add a recording & editing workspace: non-destructive takes, quantize options, basic piano-roll view, and undo/redo. • Build an automation lane that can record CC data live, draw curves, and play them back with sample-accurate timing. • Provide a straightforward UI that feels at home on macOS (native widgets or a cross-platform framework—your call as long as it’s...

...Engineering: Non-destructive disassembly of sealed, waterproof CGM sensors to access the Printed Circuit Board (PCB). ​JTAG/SWD Debugging: Identify the microcontroller (e.g., ARM Cortex-M, Nordic nRF), map the JTAG/SWD pins, and successfully connect the debug probe. ​Firmware Exploit: Use tools like OpenOCD and Ghidra to analyze proprietary firmware, locate the memory address of the 14-day timer, and develop a reliable exploit/script to reset the operational clock. ​PCB Preparation: Perform micro-soldering to remove the old electrode and prepare contact points for the new biosensor. ​Required Skills: ​Expert in Embedded C/C++ and microcontroller programming. ​Proven experience with logic analyzers, J-Link/JTAG probes, and micro-soldering. ​Deep understanding of security in...

I need a compact, self-powered field station that can continuously measure both gamma radiation and key weather metrics, then push the readings to a central control centre in real time. The core requirements are: • Sensors: a calibrated gamma detector plus temperature, humidity, wind speed & direction, and precipitation sensors. • Electronics: low-power microcontroller or single-board computer, robust ADCs, onboard data logging, and wireless back-haul (LoRa, LTE-M, or similar—open to your recommendation). • Enclosure: weather-proof, tamper-resistant housing with space for solar panel and battery pack. • Firmware & software: code for data acquisition, local storage fail-safe, and encrypted transmission to a remote MQTT/REST endpoint. A simple ...

I need a straightforward, custom-made PCB that hosts a single Time-of-Flight (ToF) sensor for accurate distance measurement in a small prototype. The board only has to provide the essentials—clean power delivery, the sensor’s required biasing components, and easy-access headers so I can plug it into my existing microcontroller setup. Here’s what I expect: • Schematic and PCB layout in KiCad,. • Gerber and drill files ready for quick fabrication. • A concise bill of materials with part numbers I can purchase locally or through Mouser/Digikey. • Basic guidelines on sensor placement to minimise crosstalk and achieve reliable readings at short range. A simple review of the design rules to avoid obvious manufacturing issues will be enough. ...

...loop, isolated • RS-485 (Modbus RTU) • Optional pulse output for totaliser integration Power can be either 24 VDC loop-powered or 12 VDC local supply; let’s keep the design flexible enough to populate for either option. Deliverables • Schematic (Altium preferred, Gerber & BOM acceptable from any mainstream tool) • Two-layer or four-layer PCB layout within the stated footprint • Microcontroller firmware source with basic flow calculation and Modbus register map • Test report showing linearity and repeatability across the 0–10 m³/h range in a simple bench loop (salt solution or tap water with added conductivity is fine) Acceptance criteria 1. Stable zero when the pipe is empty. 2. ±1 % of reading from 1 ...

I need firmware developed for a PIC16F84 microcontroller to operate a motorized door controller. The system should be able to both open/close and lock/unlock the door, controlled via buttons or switches. Key requirements: - Firmware for PIC16F84 - Control functions: open/close and lock/unlock - Activation via buttons/switches Ideal skills and experience: - Embedded systems development - Experience with PIC microcontrollers - Firmware programming, especially for motor control Safety features are not specified, but consider including at least one safety feature.

I need firmware developed for a PIC16F84 microcontroller to operate a motorized door controller. The system should be able to both open/close and lock/unlock the door, controlled via buttons or switches. Looking for someone local to Seattle as I do not have schematics, only hardware. Key requirements: - Firmware for PIC16F84 - Control functions: open/close and lock/unlock - Activation via buttons/switches Ideal skills and experience: - Embedded systems development - Experience with PIC microcontrollers - Firmware programming, especially for motor control Safety features are not specified, but consider including at least one safety feature.

I need firmware developed for a PIC16F84 microcontroller to operate a motorized door controller. The system should be able to both open/close and lock/unlock the door, controlled via buttons or switches. Key requirements: - Firmware for PIC16F84 - Control functions: open/close and lock/unlock - Activation via buttons/switches Ideal skills and experience: - Embedded systems development - Experience with PIC microcontrollers - Firmware programming, especially for motor control Safety features are not specified, but consider including at least one safety feature.

I need a straightforward schematic that shows how to create a three-coil rotating magnetic field using the energy already stored in each coil’s flyback. The goal is to keep the part count as small as possible—no microcontroller, no complex driver IC—just readily available retail components. Scope • Start with a 5 V pulse timer pwm circuit with pontentiometer that triggers Inductor A. • Show how the flyback from Inductor A hands off cleanly to Coil 1, then Coil 1’s flyback to Coil 2, and finally Coil 2’s to Coil 3. The sequence should repeat autonomously. • Add the simplest LC snubber or damping network needed to tame voltage spikes without wasting more energy than necessary. • Emphasise minimalism: every component must earn...

...what I’m after: • PCB layout that accepts the remote and toggle switches' 12 V high-side outputs • PCB layout ready for fabrication, sized no larger than 100 × 80 mm, with clearly labelled connectors for battery, ignition coil, starter, throttle servo, and expansion headers. • BOM with readily available components, preference for automotive-rated parts and 12 V transients in mind. • Microcontroller firmware • Design files in Altium or KiCad, Gerbers, pick-and-place, PDF prints, and a brief assembly/test guide. Key considerations: – The remote control already toggles +12 V lines; no RF/IR decoding is required. – The board will sit close to the engine, so vibration, temperature (up to 80 °C), and EMI resilie...

...drafted the PCB for a combined first-flush and full-tank diverter, but it is only at the “first pass” stage. Before I commit to fabrication, I want a seasoned eye on every critical layer of the design and a clean set of manufacturing files. The review needs to cover three fronts in detail: the schematic, the physical layout, and overall signal integrity. I am especially concerned about the microcontroller section—clock routing, decoupling, and any subtle errors that might surface once the board is populated. Everything else (sensors, power, etc.) looks reasonable at first glance, but feel free to flag issues if you spot them. Beyond the board itself, I would like a lightweight firmware framework created from scratch. This can be just enough to power-on the MCU...

...physical board in front of you will be the only source of truth. I need its entire hardware and embedded firmware faithfully cloned so that I can reproduce the product without functional or performance loss. You will need to: • Reverse-engineer the board, generating a clean, editable schematic, BOM, and Gerber set that match the original component layout and design. • Extract or recreate the microcontroller code so it can be re-flashed to new units and behave identically to the current module. • Deliver production-ready files plus brief build and flashing instructions that let any competent assembler manufacture and program the board. • Verify the clone on your end by powering a battery under charge and demonstrating equivalent output characteristics ...