微控制器 Jobs

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 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’m building a mobile robot and need an ESP32-based physical hand-held controller that can drive it wirelessly via Wi-Fi or Bluetooth. The only actions the robot must respond to are Forward, Backward, Rotate Left and Rotate Right—no arm control for now. Here’s what I’m looking for: • Clean, well-commented firmware for both the remote unit and the robot side, written in Arduino IDE or ESP-IDF. • A lightweight, low-latency communication routine that keeps the link alive and automatically reconnects if the signal drops. • Pin mapping and a simple wiring diagram for the buttons, power, and any status LEDs you recommend. • Quick setup notes so I can flash the code and verify that each button triggers the correct motion. I’ll consider t...

I’m looking for an experienced FPGA engineer to create a one-off firmware build for an Artix-7–based LeetDMA/Screamer PCIe DMA card. The goal is to make the card appear on the bus exactly like my reference network interface card so automated heuristic checks see no difference. Scope of work • Re-order and modify the Capability Pointer chain inside so the PCIe config space layout mirrors the donor NIC byte-for-byte. • Implement full TLP transaction handling, including correct completion timing and status codes. • Provide accurate BAR sizing and address decoding as the original NIC does. • Add proper MSI / MSI-X interrupt setup with working vectors and masking logic. Context and constraints This firmware is for security research, not production ...

Job Description We are looking for an experienced hardware/embedded engineer for an upcoming wearable product development project. The product is a compact wrist-worn connected device, and we need someone who has previously taken a wearable or similar battery-powered consumer electronics product from hardware design through prototyping and manufacturing. The device will involve: - Custom PCB / electronics design - Bluetooth Low Energy (BLE) - Microphone + speaker / two-way audio - Low-power embedded firmware - Battery and power optimisation - Wireless charging - Compact wearable enclosure / CAD - Prototype development and testing - DFM and manufacturing handoff The final project will require complete production-ready deliverables including schematics, PCB/Gerber files, BOM, firmware source...

I am looking for an experienced embedded hardware and audio electronics engineer to replicate a custom automotive audio reverb/DSP module from scratch (0 to 100 delivery). The original circuit uses a Spin Semiconductor SPN1001-FV1 DSP, a Microchip MCP604 quad op-amp, and an external 8-pin EEPROM chip. I need a complete, end-to-end service: hardware reverse engineering, firmware dumping, PCB design, component sourcing, board assembly, and delivery of a fully functional prototype. Scope of Work & Deliverables: 1. EEPROM Firmware Extraction: Extract/dump the binary code from the 8-pin EEPROM chip on the provided reference board to preserve the custom reverb algorithm. 2. Schematic Capture & PCB Design: Recreate the schematic in EDA software (preferably KiCad or Altium) including the...

I need an embedded developer who can write reliable, production-ready firmware that squeezes extra performance from aftermarket automotive modules. The immediate focus is on three devices: • CNG timing advancers • O2 optimizers • CKP sensors The end goal is measurable performance improvement, not just basic functionality, so timing accuracy, fast signal processing and rock-solid stability are essential. I am not certain whether any legacy code exists for these boards; you may be starting from a clean slate or refining half-finished firmware. Either way, I will supply the hardware, electrical schematics, and any reference data I can gather. You will advise on toolchains, microcontroller families and calibration workflows, then deliver: • Complete, compile-ready...

I have an idea for a two-way text-messaging gadget that is no larger than a common correction-tape dispenser. The brain of the unit must be an ESP32-C3 and the only wireless link I need is Wi-Fi—no Bluetooth fallback. Power will come from a small, replaceable battery rather than USB or a rechargeable cell, so every milliamp you can save counts. Here is what I expect when we are done: • A compact PCB layout that fits the rough footprint of correction tape (around 95 × 25 × 15 mm; I can adjust a little if it helps with antenna clearance). • Complete schematic, Gerbers and a concise BOM with readily available parts. • Firmware built with ESP-IDF or Arduino-ESP32 that can send and receive short text payloads over Wi-Fi, display them (even a simple OLED/LE...

I’m looking for a skilled mechatronics specialist who can jump straight into the electrical and software-programming sides of my machine-building project. The mechanical portion is already under control in-house, so your focus will be integrating, testing, and refining the control electronics and embedded code that drive the system. You should be comfortable reading and updating wiring schematics, selecting or replacing critical components, and writing clean, well-documented firmware or PLC logic that keeps everything running reliably. If you can also implement quick diagnostic routines and safety interlocks, even better. Scope at a glance • Review existing electrical design, spot weak points, propose improvements • Develop or optimise the control software (C/C++, Pyt...

We are a team of Electrical Power Engineering students working on our senior graduation project. We need an experienced Electrical Power Engineer to provide technical guidance and engineering support for designing, simulating, and building a physical prototype. The project focuses on detecting power-quality disturbances (Voltage Unbalance and Harmonics) affecting a three-phase induction motor, diagnosing the disturbance, and applying automatic corrective actions in a closed-loop system. Key areas include: 1. Hardware Prototype Development: Guidance on architecture, component selection, electrical design, sensing/isolation, protection, wiring, testing, and troubleshooting for components like three-phase induction motors, VFDs, ESP32-based data acquisition systems, harmonic filters, capaci...

I’m developing a dedicated handheld that will operate offline. No Wi-Fi, Bluetooth, cellular, or any other radio is required, so the entire design has to function in isolation. Because of that restriction I’m open to whichever operating system keeps the footprint light and the boot time quick, whether that’s a stripped-down Android build with networking stacks removed or a fully custom OS. but more likely just on/off. then a button to run. Your task is to take the idea from concept to a working prototype. I’ll need the electronic design (schematic, PCB layout, and component selection), a daylight-readable display, a rechargeable battery able to power at least eight hours of continuous use.. Low power consumption, immediate on/off and rock-solid stability. Deli...

I need a compact firmware-and-hardware solution that lets a PIC microcontroller, programmed with the XC8 compiler, manage a battery-powered power supply built around a lead-acid pack. Here is what I am after: the PIC should start up from the battery, regulate or switch the output rails as required, continuously read the pack voltage, temperature or any other basic health indicators, and trigger clear actions (for example, low-voltage cutoff or status signalling) before the battery reaches critical limits. A simple serial, I²C or even LED indicator scheme is fine for status feedback—as long as I can read the key parameters easily during bench tests. Please base the code on MPLAB X + XC8 so I can compile and tweak it locally. If you prefer a specific mid-range PIC that is re...

I already have a universal BLDC ceiling-fan driver PCB running perfectly from mains power; what it lacks is an Arduino brain. My goal is to plug an Arduino (Uno, Nano, or whichever you prefer) into the existing driver so I can: • adjust fan speed across its full range, • reverse the direction on command, and • set on/off timers, all through a small set of physical push-buttons mounted near the fan. What I need from you is a clean, well-commented sketch plus a minimal wiring diagram that shows exactly where every button, resistor, and logic-level signal ties into the driver board. If any level-shifting, opto-isolation, or triac/FET gating is required, please spell that out and include the component values. Debounced button handling and non-blocking timer logic (e.g., u...

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.