微控制器 Jobs

I am taking a grad class of computer architecture and I need someone who has experience in computer architecture, logic gates and knows how to code in C/C++ or who has a master degree in computer engineering who can do my homework assignments for the semester. This is an overview of the class: it covers the major design aspects and building blocks that go into designing modern computers. We’ll start by learning what an instruction set architecture (ISA) is, and then, using MIPS as an example, understand how they’re implemented with common ISA design tradeoffs. Next, we’ll get into microprocessor design. Starting with a single-stage machine, this class will introduce how the MIPS instruction set can be implemented. Using this implementation as a baseline many advanced perf...

I’m building a small embedded prototype that can recognise a road accident the instant it happens, trigger a buzzer on-board and then text the vehicle’s GPS coordinates to a presaved emergency contact. An accelerometer will be the sole crash-detection sensor, so the firmware has to watch for abnormal spikes on that device, classify them reliably as a collision rather than rough driving, and fire the alert routine. Here is the workflow I have in mind: the microcontroller samples the accelerometer, confirms the threshold breach, sounds the buzzer for nearby help, fetches latitude and longitude from an attached GPS module and immediately sends an SMS through a GSM or LTE-M modem. If the cellular network is down, the code should queue and retry until a signal is regained. What I ...

I am integrating a 50-pin FPC connector taken from a mobile phone into a brand-new product, but I have absolutely no documentation on it. Your task is to uncover every signal on that ribbon—power rails, data lines, control pins, grounds—so I can design a compatible mating board without risking damage to either side. Here is what I can supply once we start: • Clear macro photos of both sides of the flex and its mating board • A working handset for continuity checks or live probing if needed • physical pcb can be couriour within india What I need back from you: • A complete pin-by-pin table listing signal names, functions, and voltage levels where applicable • A brief description of the testing or reverse-engineering method you used (tracing, conti...

I need a compact laser-based perimeter protection system for a commercial site that immediately calls a predefined phone number whenever the beam is interrupted. The solution must combine reliable laser detection hardware with a GSM module (SIM800, SIM900 or similar) and the embedded code to place that outbound call within seconds of a breach. The finished unit should be self-contained, run from standard low-voltage DC, and include clear wiring diagrams and firmware source so I can duplicate or service it later. If you can integrate basic tamper detection, weather-proof housings, or an optional battery backup, mention that in your proposal—those extras would be a plus but are not mandatory. To accept the work I will power up the prototype on-site, break the beam and confirm that my...

Custom Motherboard with Microchip 48‑pin MCU – 2x 3‑Digit & 1x 7‑Digit Seven‑Segment Displays, Oxygen Sensor, 3x 12V Solenoid Valves, Flowmeter, 2x 5‑Key Touch Keypad, 2x I2C LCDs,2x Water Level Sensor, Thermal Printer, 12V Relay for Motor, air pressure sensor Project Overview I need a custom motherboard (schematic, PCB layout, and firmware) based on a Microchip 48‑pin SMD MCU (TQFP‑48). The board must interface with: . 1x air pressure sensor · 2x 3‑digit seven‑segment displays for Qty · 1x 7‑digit seven‑segment display for amt · Oxygen sensor · 3x 12V solenoid valves – controlled via on‑board MOSFETs · 1x flowmeter – pulse output, interrupt input · 2x 5‑key touch keypad · 2x I2C LCD displays (16×2) · 2x...

I have an STM32F407VET board that will drive a completely stand-alone single-axis solar tracker. The controller must perform three key jobs: • Automatic sun tracking – use only a gyroscope/accelerometer (no light or temperature sensors) to predict the sun vector and move two actuators so the panel stays aligned all day. • Manual control override – via push buttons or simple UART commands I can pause the algorithm and jog each axis, then resume tracking instantly. • Data logging and monitoring – record attitude, motor commands, and health metrics to a micro-SD card while simultaneously streaming the same data over UART for live viewing. I expect clean, non-blocking C firmware that compiles in STM32CubeIDE for the F407VET. HAL drivers are fine; FreeRTOS...

I have a complete controller-level Bill of Materials that includes microcontrollers, capacitors, position sensors, IPMs, N-channel MOSFETs and IGBTs. The immediate goal is to drive the overall cost down without sacrificing reliability or long-term availability. Most of the boards now work with a mix of TI, Infineon, yageo, ATMEL, Microchip and STMicroelectronics devices, but I’m open to shifting to any pin-compatible or firmware-friendly alternative if it meaningfully trims the price. The same mindset applies to passive and power parts: if you can source a spec-matched capacitor, MOSFET or IGBT that lowers the piece price and is easy to get from the usual sources - China/Taiwan and their local distributors in India, i am open to it. Would prefer a Chinese/Taiwanese national who ca...

Un workspace de crates Rust sin lógica de negocio — entrega eventos ("tecla pulsada en el puerto 2", "tarjeta leída", "orden BLE recibida") y operaciones ("abre el relé 1", "responde por BLE") — que un binario de aplicación enlazará después: Esqueleto de ejecución: binario estático, tokio, fichero de configuración único, logs a journald, integración con systemd (sd_notify, watchdog), usuario sin privilegios. Capa de abstracción de placa con perfiles declarativos para Radxa ROCK Pi S0 (Rockchip RK3308, Armbian) y Raspberry Pi Zero 2 W (Raspbian), y guía para incorporar placas futuras. Identidad estable del equipo. Driver UART de nuestra pl...

I need a concise Arduino Uno sketch that drives my Nema 34 stepper through its existing driver in a continuous loop with the following timing: • From home, turn 60° clockwise and hold that position for one second. • Return to the home position and pause one second. • Turn 60° anticlockwise, pause one second, then repeat the entire sequence indefinitely. Please base the calculations on a typical 200-step Nema 34 (1.8° per step) unless I can later change a constant for different micro-stepping settings. No sensors or limit switches are required; it is pure open-loop control. Alongside the .ino file, include a clear wiring diagram that shows the connections between the Arduino Uno, my stepper driver, power supply, and any needed resistors or opto-isolators so...

i need a .vex file produced for a transmitter we sell to iBwave software users

Project Title: 3D Enclosure Design for ESP32 Desktop Companion (FDM 3D Printing) Hello, I need a custom, clean, and rigid 3D printable desktop enclosure for an ESP32 retro display gadget. The design must be optimized for FDM printing (2-part design: Front Main Body + Screw-on Back Cover). I have all the specific component links so you can use exact CAD dimensions: Components & Exact Links: 1. Display: 2.4" TFT LCD ST7789 (320x240) SPI module Link: 2. Microcontroller: ESP32 DevKit V1 (30-pin, USB-C version) 3. Mainboard: Double-sided prototype perfboard, exactly 70 mm x 50 mm 4. SD Card Reader: Standard Arduino SPI SD card shield module Link: 5. Rotary Encoder: EC11 Rotary Encoder with push-button (Shaft L=15mm, threaded bushing M7) Link: 6. LED Matrix: 2x2 WS2812B R...

I already built the user interface in SquareLine Studio for an Elecrow 7" CrowPanel (ESP32-S3). The layout consists of four full-screen background images with four transparent touch buttons placed on top. Pressing a button should simply toggle a corresponding light by driving one of the three external relays wired to the CrowPanel’s GPIOs; touching it again turns the same light back off. What I still need is the firmware that ties everything together: • Import the SquareLine-generated LVGL project, read the touch events, and link each of the four on-screen buttons to its relay output. • Drive the relays through ESP32 GPIOs with proper debouncing and visual feedback on the button (e.g. highlighted state while the light is ON). • Provide a clean PlatformIO o...

I need a custom mixed-signal circuit engineered from the ground up to drive an optical wireless communication link. The design must cleanly blend an accurate analog front-end—handling photodiode receive and LED/VCSEL drive stages—with the required digital processing blocks for modulation, clock recovery, and protocol framing. My priority is signal integrity across the entire chain: low-noise transimpedance amplification, precise ADC/DAC selection, and robust high-speed PCB layout that minimises jitter and EMI. Component choices should be commercially available and cost-effective for a small production run. Because the target is an optical wireless channel rather than Bluetooth, Wi-Fi, or Zigbee, you are free to choose or recommend the most suitable modulation scheme (e.g., ...

R7FS5D37A3A01CFP See my side hardware ready Actually my project . Collect data from plc and push into cloud server The plc have rs232 port some plc ds485 port Protocol may be modbus or some plc own . We give all format and structure Total 10 type of plc See . The collected data from plc push i into 4 sec interval to 3 location Ip address At the same time 1. TCP Ip format 2 location 104 format Maximum tags 100 from plc From that 100 tags 15 tags only we push 104 format See the main key point on ur code the ec200 module always connect with network more details will be shared with potential freelancer

R7FS5D37A3A01CFP See my side hardware ready Actually my project . Collect data from plc and push into cloud server The plc have rs232 port some plc ds485 port Protocol may be modbus or some plc own . We give all format and structure Total 10 type of plc See . The collected data from plc push i into 4 sec interval to 3 location Ip address At the same time 1. TCP Ip format 2 location 104 format Maximum tags 100 from plc From that 100 tags 15 tags only we push 104 format See the main key point on ur code the ec200 module always connect with network more details will be shared with potential freelancer

I need a compact controller board built around the STM32F103CBT6 in the 48-pin LQFP package (or a pin-compatible alternative with the same Cortex-M3 core). The board must expose three independent serial channels: • RS-485 • RS-232 • A UART linked to an on-board serial-to-TCP module that speaks plain TCP/IP Reliability is critical. Please integrate proven over-voltage, short-circuit and over-current protection on all power inputs as well as the three interface blocks. If you are more comfortable substituting a different F1-series part with identical footprints, that’s fine as long as the firmware and pinout remain drop-in compatible. Deliverables • Complete schematic (Altium, KiCad or EasyEDA) • Four/two -layer PCB layout with proper isolation be...

Project Overview: Design and prototype a 446 MHz wireless audio broadcast system for indoor mosque sound in India (using the license-free PMR446 band). 1. Mosque Transmitter Unit: - Audio line-in from Mosque PA amplifier (Ahuja). - MAX9814 AGC leveler/compressor to prevent voice clipping or distortion. - Auto-VOX sound trigger to start transmitting automatically when the Muazzin speaks (zero manual buttons). - SA818S-U UHF module (1W Tx mode) tuned to 446.0562 MHz with 67.0 Hz CTCSS tone. - 50-ohm SMA connector connecting to outdoor Diamond X-50 minaret antenna via 15m RG-213 cable. - 5V DC power supply with surge protection. 2. Home Receiver Speaker Box: - SA818S-U module (Rx mode) tuned to the same 446.0562 MHz + 67.0 Hz CTCSS code. - Hardware squelch/mute control: MUST be 100% dead si...

I’m building a high-speed communication interface on an STM32-based board and need production-ready firmware written in C/C++. The microcontroller is an ARM Cortex-M series device, and the single most important goal is to move packets through the interface as quickly and reliably as possible—latency can be modest as long as overall data throughput remains very high. You will design and code the full communication stack, configure the peripheral clocks, DMA, interrupts, and buffering strategy, then expose a clean API that my application layer can call from RTOS or bare-metal. Low-level register work is fine, but you’re equally welcome to leverage STM32 HAL/LL or CubeMX if that accelerates development; the final code must compile under STM32CubeIDE or GCC-based Makefiles...

I need a complete IoT gateway hub that brings LTE (4G), Wi-Fi, Bluetooth, Zigbee and sub-GHz RF into a single, reliable unit for remote monitoring and alerting of smart-home devices. The goal is straightforward: gather data from a variety of in-home sensors and actuators, push it to the cloud over cellular when Wi-Fi is unavailable, and relay actionable alerts back to the user in real time. Here is what I expect: • Hardware design that accommodates the five radios with proper coexistence planning, power management and antenna layout. • Embedded firmware that can automatically select the best back-haul (LTE or Wi-Fi), maintain secure connections and expose a clean API or MQTT/HTTP interface for the smart-home layer. Also with bluetooth, zigbee and rf. • Delive...

We are a medical device manufacturer developing the next-generation electronic control box for an existing product. We have received a Statement of Work from an Indian engineering services firm covering PCBA design, firmware development and Engineering Verification Testing, and we want an independent expert opinion on it before we sign. This is a review engagement only — no design work. The device (in summary): mains-connected Class II active medical device. Single integrated 6-layer PCBA with a universal-input mains stage using a certified medical AC/DC module, four isolated AC relay channels, dual isolated 4-wire PT1000 sensing, coolant flow and CT current monitoring, an STM32H7-class MCU with external SDRAM, a 5–7" IPS capacitive touch display running LVGL, an LTE Cat...

I’m looking for an embedded-systems engineer who can take ArduPilot’s AP_Periph codebase and turn it into a robust CAN-bus battery monitor. The unit will sit on a DroneCAN network and stream full MAVLink telemetry, so it can slot straight into my existing ground-station setup without any extra protocol bridges. Integration with other telemetry options such as or SmartPort isn’t needed right now. Key functions I must see on the bus: • High-accuracy individual cell voltage for every cell in the pack (not just pack voltage) • Hall-effect current sensing that stays linear and low-loss all the way to 400 A • Standard AP_Periph health, identification and parameter handling so the flight controller recognises the device instantly Deliverables 1. Schemat...

I need a specialized plumber's level that indicates pipe flow with precision. The tool should incorporate a digital display to show the pipe's level and angle. Essential Requirements: - Digital display for pipe level and angle - Water-resistant casing - Calibration feature Ideal Skills and Experience: - Experience with digital display integration - Knowledge of waterproof design - Calibration expertise

I need production-ready firmware for a Renesas MCU that will exchange data through a Quectel EC200 cellular module using both IEC 60870-5-104 and plain TCP/IP protocols. The code must handle complete data transmission, reception, and on-board processing so the MCU can act as an intelligent field unit that talks reliably to a SCADA master as well as to standard IP services. Scope • Build or integrate a lightweight IEC104 stack alongside a TCP socket layer that can coexist without blocking. • Manage all EC200 interactions (AT commands, connection setup, keep-alive, error recovery) over UART/SPI as appropriate. • Implement configurable buffers, parsing, and frame validation so that raw sensor payloads can be wrapped/unwrapped for each protocol. • Provide hooks whe...

I already have the full mechanical side of a new, cost-effective outdoor vending machine—frame, actuators, motors, sensors, the lot. What’s missing is the electronic heart: a sleek touchscreen interface, a reliable controller, and rock-solid QR-code payment processing. Here’s what I need built and integrated: • A capacitive touchscreen (preferred size 7-10 in) that looks premium outdoors, survives glare and light rain, and gives a smooth, intuitive flow from product selection to checkout. • A central controller (Raspberry Pi, STM32, or a similarly capable board—open to your recommendation) that drives the existing motors and sensors, handles temperature monitoring, door locks, and any future add-ons. • QR-code payment only: the screen should dis...

Experienced KiCad Hardware Engineer – Schematic Capture, DFM-Optimized PCB Layout & Production Package (Turnkey JLCPCB Assembly) Job Description: Honeycomb LLP is seeking an experienced embedded hardware and PCB design engineer to take a product design from initial block diagram/specifications through complete schematic capture, PCB layout, and turnkey assembly package delivery. The board will host an embedded microcontroller ecosystem (e.g., ESP32 / RP2040 / STM32) interfacing with sensors and power management circuits. The final design must be fully optimized for cost-effective manufacturing and assembly via JLCPCB SMT services. Scope of Work & Responsibilities: 1) Schematic Capture: Design modular, production-ready schematics in KiCad (latest stable version) adhering...

Namaste, mujhe ek Low-Cost Wireless Audio Receiver/Box Prototype banwana hai. Main pehle ek chhota working prototype banwakar uski testing karna chahta hoon. Agar prototype sahi tarike se kaam karta hai, to aage isi design ke bahut saare units banwane hain. 1. Hamara Basic Concept Hum ek aisa chhota aur kam lagat wala wireless receiver box/module banana chahte hain, jo ek main transmitter/master unit se wireless audio signal receive kare aur us signal ko speaker/amplifier tak pahunchaye. Hamara uddeshya hai ki gharon, dukaanon aur anya locations par lage chhote speaker boxes ko har jagah alag se internet/Wi-Fi se connect karne ki zarurat na pade. Main system kuch is tarah rahega: Main/Master Unit → Wireless Signal → Receiver Box → Amplifier/Speaker Isi concept par hume...

I have a TI-OS graphing calculator on my desk, a bag of parts, and a YouTube tutorial that supposedly turns the device into a pocket-sized ChatGPT terminal. What I need now is an experienced hardware-meets-firmware problem-solver who can transform that theory into a working build. Here is what you will be working with • Device: Graphing calculator running TI-OS • Goal: Load and run ChatGPT locally (or via whatever clever connectivity you propose) • Desired integration level: “Camera” – I chose this because I want to push the project further than simple text replies; ideally the camera add-on will feed images straight to ChatGPT for on-device analysis. If you see a smarter route, feel free to outline it, but the camera element must remain central. Scop...

Technical Specification: Inkjet DC Servo Motor Emulation via NEMA Stepper Motor (Closed-Loop Conversion)1. Project ObjectiveTo design and implement an electronic intermediary system (signal translator) to replace the original DC carriage motor of an inkjet printer with a NEMA stepper motor. The system must guarantee ultra-smooth, resonance-free linear motion and high-fidelity real-time positioning feedback to prevent the printer's mainboard from triggering a Carriage Jam or Fatal Error state.2. Block Diagram and Signal Flow ┌──────────────────────────────────────────────────────────┐ │ INKJET PRINTER MAINBOARD │ └───────────────┬──────────────────────────▲───────────────┘ │ │ [Integrated H-Bri...

Need small anf compact HDI multilayer pcb from systematic to pcba which can be connected with my existing smartphone pcb . Requirement in custom pcb are - 1) NFC + custom NFC antena 2) Secure element 3) secure MCU 4) type C USB for data 5) vibrator 6) touch buttons 7) pogo pins for charging BOM and all details of my main pcb will be discussed and provided to you

**Freelance PLC Programmer Required – Mitsubishi FX5 CPU / GX Works3** We are looking for an **experienced PLC programmer (10–12+ years of hands-on experience)** with strong expertise in **Mitsubishi FX5 series PLCs and GX Works3 programming software**. **Project Background:** We previously supplied a **complete paint shop automation system for a client in South Africa**. One of the spray booths is currently facing an operational issue, and we require an experienced PLC programmer to troubleshoot and rectify the issue remotely. **Issue Description:** The spray booth has two operating cycles: 1. **Spray Cycle** – The fan starts and operates as required. 2. **Cooling Period** – The fan switches OFF as per the sequence. 3. **Bake Cycle** – When the bake cycle...

I need a complete electronics solution that can replace the original EBB board on an Axidraw-style writing machine. The job covers both hardware and software. Hardware scope • Design a compact, two-axis motor-control PCB built around an ESP32. • Integrate two stepper-motor drivers capable of smooth, quiet motion at plotting speeds. • Provide a reliable USB interface for host control and firmware updates. • Include all required power-management, end-stop, and pen-lifter circuitry so the board can drop straight into an existing Axidraw frame. • Deliver production-ready assets: schematic (PDF & source), PCB layout, Gerber/Drill files, BOM with part numbers, and a brief assembly guide. Firmware scope • Develop firmware that exposes Axidraw-compat...

I aim to develop a solution that will facilitate data communication between an Arduino UNO and a SIM7600E using AT+COMMAND. The primary data in focus will be temperature sensor readings. Key Responsibilities: - Setting up a reliable connection between Arduino UNO and SIM7600E - Implement AT+COMMAND for effective communication - Design a protocol for transmitting temperature sensor data Ideal Skills: - Solid knowledge of Arduino - Proficiency in handling SIM7600E - Experience in implementing AT+COMMAND - Understanding of sensor data transmissions. Please ensure you can efficiently deliver on these requirements, and provide the mentioned sensor data communication before placing your bid.