Embedded Systems Jobs

我正在启动一款面向家庭环境的小型机器人项目，目前处于“初步需求”阶段，核心目标是让它能够自然地对话与陪伴家人。机器人需要具备稳定的语音识别能力，并在接收到指令后以三种方式做出回应：说话反馈、执行简单动作以及在屏幕上显示信息。 从技术角度来看，整机需要基于自主设计的 PCB，主控可采用 ARM 或 RISC-V 架构的嵌入式方案；还要集成基本环境传感器，并预留扩展接口以便后续添加更多模组。我希望你能主导硬件原理图与 PCB 设计，完成底层固件的快速原型，实现与传感器、语音麦阵列及小尺寸显示屏的驱动联调，并给出可靠的硬件测试方案。熟悉 AI 加速器或边缘计算模组的经验会非常加分，因为日后有计划将部分语音与推理任务本地化。 交付物需包括： • 机器人硬件整体架构图 • 可生产的 PCB Gerber 与 BOM • 嵌入式固件原型（含语音识别接口、动作与显示控制逻辑） • 简易测试工装与测试用例文档 • 开机演示视频或现场演示，证明设备能在家庭场景下完成对话并做出多模态回应 我期待与你一起把这位“家庭伙伴”从概念变成可握在手中的真实设备。

I’m developing an ultra-thin heated glove that feels no bulkier than a regular winter liner yet warms the wearer’s hands rapidly and evenly. To get there I need help moving from concept sketches to a working prototype I can put through real-world testing. Here’s what I already have and what I still need: • Concept drawings that illustrate overall look, target thickness (≤3 mm excluding battery) and desired heating zones along fingers and back of hand. • Preliminary research on micro-film resistive heaters, flexible lithium-ion pouch cells, and low-profile USB-C charging circuits. You would handle the technical integration—selecting the thinnest safe heating element, embedding it into a comfortable textile stack, designing a compact power/controls m...

We are looking for an experienced electronics / embedded hardware freelancer to help assemble and test 5 pilot units of an ESP32-S3 based IoT mini controller. The PCB/PCBA boards are already designed and manufactured by JLCPCB. The firmware file is also ready. This project is not for PCB design and not for firmware development from scratch. The main task is physical assembly, firmware flashing via USB-TTL, and basic bench testing. The final goal is to prepare 5 working pilot units in the correct order: Milestone 1: Assemble, flash and test 1 pilot unit first. Milestone 2: After the first unit is validated successfully, assemble, flash and test the remaining 4 units using the same process. Scope of work: * Mount the PCB/PCBA into an IP65/IP66 enclosure * Connect the external Wi-Fi an...

More details: Which software tool should be used to recreate the schematic? Altium What information should successful freelancers include in their application? Experience Do you have any specific requirements or standards that the schematic must adhere to? Industry standards

I need a senior-level electrical engineer who can split time between working remotely and being on site in Orange County, CA. The project centers on motor-control electronics, so every board you design must reliably drive, sense, and protect a variety of motors under real-world loads. Here’s the flow I expect: • Draw the schematic and capture the BOM for a new motor-control PCB, selecting components that meet cost, thermal, and EMI constraints. • Lay out the board for manufacturability, noise immunity, and serviceability, then generate all fabrication and assembly files. • Oversee prototype builds, bring the hardware up in the lab, and run functional, thermal, and load tests with my existing motor rigs. • When issues surface, dive into trace analysis, osci...

I need a compact, kitchen-chimney-friendly PCB that drives an ultrasonic transducer in the 40 kHz – 60 kHz band from an AC-mains supply. The goal is a reliable, low-cost circuit that keeps insects away without adding bulk or noise to the appliance. Here is the scope I have in mind: • Circuit conception and PCB layout, mindful of minimal component count and low BOM cost • Full documentation package—schematic, PCB design files, Gerbers, pick-and-place data, and detailed BOM with part numbers and estimated pricing • Advice on a suitable microcontroller or discrete-logic approach; I’m open to Arduino, ESP8266, PIC or any alternative that meets cost and space targets • Consideration for safe mains rectification, filtering and isolation so the board ...

I need a complete electrical and mechanical design for a Framework Laptop expansion card built around the RP235xA microcontroller in the 30-GPIO QFN-60 package. My top priority is that everything fits perfectly inside the standard expansion-card envelope defined in Framework’s official repository (). Key requirements you must hit • Use the RP2350 and expose all USB-C power and signal constraints exactly as the Framework reference dictates. • Keep the card flush: no part of the PCB, component or connector may project past the official boundary. • Place two tactile switches (reset and boot) plus one RGB LED (I’m thinking WS2812 or equivalent) and one status LED on the underside so they are visible and accessible when the card is plugged into the laptop. ...

**Siemens TIA Portal Commissioning Engineer (Freelance) – Satu Mare, Romania** Dear Sir or Madam, For an ongoing industrial automation project, we are currently looking for an experienced **Siemens TIA Portal Commissioning Engineer** on a freelance basis. **Project Details** * **Client:** Automotive * **Location:** Satu Mare, Romania * **Start:** ASAP * **Duration:** 6 months * **Workload:** Approx. 50 hours per week **Scope of Work** * Commissioning of an automated assembly line * PLC commissioning and troubleshooting using Siemens TIA Portal * Support during startup and ramp-up phase * Optimization and debugging of PLC software * Integration and commissioning of welding stations * Cooperation with electrical, mechanical and production teams on site **R...

I want to prove that a pen-shaped gadget can masquerade as a Bluetooth HID and reliably control media on an iPhone. All I need right now is a working one-off prototype; certification, refined industrial design, and long-term battery optimisation can wait. Core requirements • The electronics must fit inside a pen body (a 3D-printed tube is fine). • On power-up it should pair with an iPhone as a standard HID remote. • A single tactile button will cycle through Play/Pause → Next Track → Previous Track in that order, sending the appropriate consumer-control codes. • I’m flexible on the radio stack—Bluetooth Classic or BLE, whichever gets the job done fastest. • Robust, repeatable functionality matters more than looks. What I expect to ...

I need a compact, reliable AC solid-state relay designed specifically for driving pump loads. The control side will accept 3–32 V DC, while the load side must safely switch 24–380 V AC at a continuous 25 A. Core expectations • Status indication via a front-panel LED • Full opto-isolation between control and load • Zero-cross switching is preferred to minimise inrush, but I will consider a non-zero-cross solution if it offers clear advantages for motor-driven pumps. • The housing should be compatible with a standard heat-sink footprint, and I am open to either DIN-rail or panel mounting depending on what your thermal calculations show to be most practical. Deliverables 1. Full schematic with component values and reference designators 2. PCB ...

Project Overview We are seeking an experienced Embedded Hardware & Firmware Engineer with strong expertise in power electronics to design and develop a complete hardware and firmware solution for a variable-frequency, variable-voltage AC power supply. The system will generate a controlled AC output from a high-voltage DC input source and will be controlled through an SPI interface. Technical Requirements Input * DC Input Voltage: 120VDC to 150VDC Output * Output Frequency: 0 to 100 Hz (programmable) * Output Voltage: 20VAC to 100VAC RMS (programmable) * Stable output regulation across operating range Control Interface * SPI interface for: * Frequency adjustment * Output voltage/amplitude adjustment * Status and fault monitoring (preferred) Scope of Work Hardware ...

Saya sedang mengembangkan mainan pesawat bertenaga solar cell (2 V DC / 55 mA) dan memerlukan referensi micro motor DC ber-stall current rendah yang benar-benar bisa berputar dengan pasokan sekecil itu. Detail kebutuhan: • torsi & kecepatan tidak penting—yang utama motor mau start dan berputar stabil. • Motor DC harus kompatibel dengan ukuran solar cell yang sudah saya miliki. • Ya, harus sangat kecil; diameter dan panjang total tidak boleh melebihi motor bawaan di lampiran. Yang saya harapkan Anda kirim: 1. Daftar minimal 5 kandidat micro motor DC dari Alibaba atau marketplace global lain (AliExpress, Mouser, Digi-Key, dsb.). 2. Untuk tiap kandidat: link langsung ke produk, datasheet atau lembar spesifikasi, tegangan kerja, arus no-load dan stall, ...

ESP32 Bluetooth-Enabled Umpire Indicator Prototype with Rotary Encoders (BLE Sync to Mobile App) *We have two full time App developers that you can work with. Project Description: Seeking an experienced embedded systems engineer to develop a functional prototype of a Bluetooth Low Energy (BLE) digital umpire indicator for slo-pitch softball. Reference: See attached image of standard Champion 4-dial indicator (Balls, Strikes, Outs, Innings). Requirements: • Replicate tactile dial feel using rotary encoders (notched/clicking action for no-look operation). • ESP32 (preferred) or equivalent microcontroller with BLE to transmit real-time count updates (balls/strikes/outs/innings) to a mobile app. • Device pairs with our existing slo-pitch live-streaming + scoring app and up...

RFID Hardware Product Development (NDA Required) We are looking for an experienced Hardware Engineer / RFID Specialist to design and develop a custom RFID-based hardware product. The product involves tracking and measuring physical expansion, dimensional changes, or movement of a tagged object over time using RFID and related sensing technologies. At this stage, only high-level information is being disclosed. Detailed project specifications, use cases, technical requirements, and commercial applications will be shared only with shortlisted candidates after execution of a Non-Disclosure Agreement (NDA). Required Skills RFID Technology (HF, UHF, NFC, Active/Passive RFID) Embedded Systems Hardware Product Design PCB Design Sensor Integration IoT Hardware Development Prototype Development Prod...

Looking for an experienced Python/Embedded developer to adapt an existing Raspberry Pi pressure-control project for a Nano-based board. Current application: - Reads air pressure from a sensor - Turns a motor on when pressure falls below threshold - Runs hourly checks - Existing code is approximately 75-90% complete Requirements: - Refactor and finalize the code for Nano hardware - Configure GPIO, sensors, motor, and indicators - Enable automatic startup after boot or power loss - Create a Windows batch deployment script - Provide setup documentation and pin mapping - Verify reliable operation through power-cycle testing Deliverables: - Updated Python source code - Windows deployment script - README documentation - Power-cycle test confirmation

ESP32 firmware for an experimental, battery-powered maker devkit (SyncStim) that plays a 10 ms audio burst and, at a configurable interval, fires a charge-balanced biphasic constant-current electrotactile pulse train (plus an LED cue). The core requirement is timing fidelity and safe constant-current output, verified on an oscilloscope. Hardware is already specified (BOM): ESP32-WROOM-32D, MAX98357A I2S amplifier, DRV8871 H-bridge, DC-DC boost converter, LM334 constant-current source, current sense, SD card. Battery-powered and mains-isolated. Behavior: repeats a 200 ms cycle (5 Hz). Each cycle is a 10 ms audio burst over I2S, then after a configurable inter-stimulus interval, a burst of 3 biphasic pulses (150 microseconds per phase, 1 ms onset-to-onset), constant current, under 3 mA, ch...

I’m developing a new consumer-electronics gadget and need a compact, production-ready PCB designed around a Wi-Fi/Bluetooth module. The board must stay within a 4 x 4 inch footprint, leaving enough clearance for an enclosure that is already in progress. Here’s what I’m expecting from you: • Complete schematic capture and PCB layout in your preferred professional tool (Altium, KiCad, or Eagle are all fine). • Well-routed RF section that maintains antenna performance and meets FCC pre-compliance guidelines. • Gerber, drill, and pick-and-place files ready for fabrication. • A concise BOM with part numbers that have strong supply-chain availability. • Brief design notes highlighting impedance-controlled traces, power-plane considerations, a...

I have the full schematic for working legacy PCB. I need it redesigned and modernised into a new board using current components, while keeping the original board size, mounting holes and connector positions. The old design uses PIC18F8722, FT232RL, TDA7465, video switching and RCA outputs. The new design should replace those with STM32 native USB, modern audio DSP/codec, protected coin inputs, modern power regulation, and custom firmware support. This is not an exact clone. It is a modern drop-in replacement using the original schematics as a reference. Key things :- Keep: * Board size: 168mm × 206mm * 6 mounting holes * USB-B position * Existing amp connectors * Mic input * Coin mech interface * IR receiver/service button * J8 motherboard audio input Remove: * RCA sockets * Vi...

I have a small home-automation module that needs a reliable touch interface, so the task is to engineer a 5 V circuit around the TTP223 that cleanly switches between high and low digital levels whenever it is touched. Precision in sensitivity and long-term stability matter more to me than squeezing out the very last microamp, yet the design should still sit comfortably in standby without wasting power. Key expectations • The sensor must tolerate normal household electrical noise without false triggering. • Output logic levels must be directly MCU-friendly (TTL/CMOS, active-high preferred). • Component count should stay minimal; surface-mount parts are fine. • Any necessary debounce or filtering should happen in hardware rather than firmware. Deliverables 1. ...

I am building a small system that will ride on a vehicle and needs smart power and signal management. Two of the three loads are a Camera and a Transmitter; the third is still open for discussion once the basic framework is proven. An Arduino-class board running Python (CircuitPython or MicroPython is fine) will sit at the center of the design. Core behaviour • A proximity sensor with a simple NO/NC or other switched-DC output tells the microcontroller when the vehicle is near its target. On that event the code must turn the devices on or off, make or break the live analog video path, and if required trigger visual or audible alerts. • A vibration/accelerometer module tracks motion. When the vehicle has been still for a preset timeout the controller should cut power to all t...

I have a concept for a small control board that will act purely as a communication interface; the brain must be a microcontroller and every line on the board will ultimately speak SPI. I need the complete journey covered—from schematic capture through to a working prototype—and a simple companion application that can configure, send, and read data over that SPI bus. Hardware I want you to select an appropriate MCU, lay out the PCB, generate the BOM, and produce production-ready Gerbers. The board will only need the essentials: power regulation, the MCU, an SPI header, and whatever discretes are required for reliable signalling. Options such as UART or I²C might be added in a later revision, so leave enough pins and routing headroom for that future expansion. Firmware ...

I'm looking for an experienced firmware developer to work on an ESP32 microcontroller. The project involves integrating Wi-Fi connectivity and sensor integration for electricity monitoring. Key Requirements: - Develop firmware for ESP32 - Implement Wi-Fi connectivity - Integrate various sensors for monitoring electricity usage - Ensure reliable data transmission and system performance Ideal Skills and Experience: - Proficiency in ESP32 and related development environments - Strong background in firmware development - Experience with Wi-Fi protocols and sensor integration - Knowledge of electricity monitoring systems Please provide relevant work experience and approach to the project.

I’m building a tiny monitoring node around an ATTiny85 that has only four external components: a single LED, an NTC thermistor, a Hall-effect sensor and a piezo buzzer. I need clean, memory-efficient Arduino-style C/C++ code that: • Samples the thermistor, converts the reading to temperature and classifies it into three adjustable ranges. • Drives the lone LED so the user can tell at a glance which range we’re in (for instance OFF below the first threshold, slow blink in the middle, fast blink above the second threshold—but I’m open to any pattern that is easy to recognise). • Activates the buzzer whenever the temperature crosses the high-temperature limit and keeps it on until the reading falls back below that limit. • Reads and debounces...

I need a PCB design for a Graphene-based FET sensor readout system. The PCB should facilitate I-V characterization of GFETs by sweeping gate voltage (0-3V) and measuring current or resistance between source and drain. Key requirements: - Size: Medium (4x4 inches) - Interface: Connector terminals preferred - Component Inclusion: Partial component list available, open to recommendations Ideal skills and experience: - Expertise in PCB design - Experience with GFET or similar sensor technologies - Familiarity with I-V characterization setups - Knowledge of various electronic components and their integration

PCB Design Requirement Document Project: ARC LABS Smart Home Automation Controller About Us ARC LABS is an IoT and Embedded Systems company focused on developing commercial smart home and Industrial IoT products. We are looking for an experienced PCB designer who can help us develop a production-ready smart home controller PCB. ⸻ Project Scope Design a compact, reliable, and manufacturable PCB for a WiFi-based Smart Home Automation Controller. The PCB should be suitable for commercial production and comply with standard PCB manufacturing guidelines. ⸻ Hardware Requirements Main Controller * ESP32-C3 or ESP32-S3 (preferred) * USB Type-C programming interface * Auto reset and auto boot circuitry Power Supply * 230VAC to 5V isolated SMPS * 5V to 3.3V regulator * Over-voltage and ...

SKILLS:PCB Layout, EasyEDA, Electronics, Electrical Engineering, Embedded Systems, Circuit Design, Schematic Review, DFM, Gerber, BOM, Mixed-Signal Design DESCRIPTION: We need an experienced electronics / embedded hardware PCB designer for a confidential controller PCB project. The work must be done in EasyEDA. Important: full schematics, EasyEDA files, component details, connector mapping, mechanical constraints and architecture will NOT be shared publicly. Files will be shared only after NDA and IP Agreement are accepted. Project scope: 1. Review the existing schematics before PCB layout. 2. Identify schematic issues, missing values, footprint risks, connector or pin-mapping risks, power or grounding risks and manufacturing risks. 3. Prepare a correction list before PCB design starts....

I have a PIC-based controller receiving Modbus RTU traffic and I need to pull meaningful, human-readable information out of those frames. The transport layer is already running and CRC checks are in place; what is missing is a compact, well-structured decoder that can sit inside my existing project and translate function codes, addresses, and payloads into variables the rest of the firmware can use. Your job is to write and supply code that runs on a PIC (XC8 / MPLAB X tool-chain) and: • Parses incoming Modbus RTU frames in real time. • Supports at minimum function codes 03, 04, 06 and 16, with a clean way to extend to others. • Exposes the decoded data through a simple API or callback so my application layer can consume it immediately. • Handles error responses...

I need a proven method to bring the traveling and hoisting drives of an EOT crane into perfect electrical synchrony so that both ends move at identical speeds under every load condition. The core objective is speed-matching; everything else—position alignment or load sharing—follows once the motors stay locked together without hunting or drift. Please outline, in a detailed project proposal, how you would: • Sense real-time motor speed (encoder, tachogenerator, or another reliable feedback device). • Close the loop through the existing VFD/PLC or recommend a replacement architecture if required. • Handle calibration, fault detection, and re-synchronization after an emergency stop. • Supply wiring diagrams, parameter tables, and the logic code (Siemen...

I need a compact USB device with 3vdc battery powred that continuously records both temperature and relative humidity, then stores the readings locally until I plug it into a PC. Once connected, a lightweight Windows application should automatically pull the stored data and show it in an easy-to-read table—date/time stamp, temperature in °C, and %RH per line, with options to export to CSV or Excel. Core requirements • On-board sensors accurate to at least ±0.5 °C and ±3 %RH. • User-selectable logging interval (e.g., 1 s to 30 min) saved to non-volatile memory. • Windows desktop software built in C#, Python, or another common language that needs no special licenses. • The UI opens directly to a tabular view; basic filters (date range)...

For an R&D platform based on the SAM E54 Xplained PRO, we would like to make several (starting with 6) plug-in boards. The boards should be placed on one of the 3 headers of the Xplained. We have divided boards into 3 categories. Power supply, DCD converters (±48V or +40V or ±24V, 3V3, VREF 2.5, 1.25V, etc.). Driver OUTPUT User Interface and related For the first 4 boards (option 1 and 2), there are already schematics that can be used. These are already R&D PCBA files in use, but now we want to split them into partial boards as well. User Interface boards could be very simple, like a button, LED, header, screw terminal, etc. On request, new plug-in boards will need to be designed and created. All of this must be done with a program that is comp...

I need an experienced embedded developer to build the firmware modules that will turn an STM32H743 board into a reliable, high-speed data-acquisition unit. The focus is on two core capabilities: 1) pulling samples from the microcontroller’s own Internal ADC at the highest sustainable rate, and 2) performing first-stage signal processing so that the raw stream is converted into clean, time-aligned data ready for higher-level analytics. The code must expose clean, interrupt-driven or DMA-backed APIs for the following interfaces: UART, SPI, I2C and an “Adc high speed” path that moves samples straight from the ADC to RAM with minimal latency. Please write everything in C/C++ using STM32CubeIDE (or compatible Makefile flow) so it drops straight into our existing build system....

I run a full pathway of AI courses that take learners from absolute beginner concepts right through to advanced, project-based work. My immediate objective is simple: add forty new student enrollments to the program. The audience you reach must be students—undergraduate, postgraduate, or gap-year learners are all fine—as long as they are genuine individuals who personally complete the sign-up form. You are free to use any ethical outreach you prefer (social media groups, university forums, email lists, peer referrals, etc.). Just avoid bots, incentives that violate platform rules, or paid sign-ups that won’t actually study. Deliverables • 40 unique, confirmed student registrations completed through my trackable link. • A brief spreadsheet showing each regi...

I need an analog circuit designed from the ground up and then laid out on a production-ready PCB for a consumer-electronics product. The finished board must operate as a single, unified control unit that fits cleanly inside a dedicated enclosure, so component placement and overall footprint matter as much as the schematic itself. I need an integrated control panel which houses two subsystems. One is water pumping line and the second is uv disinfection line. The circuit diagram for both subsystems will be provided . Kindly provide an integrated one and a pcb design for the same.

I need the existing 433 MHz transmitter board—built around a GD32 MCU and RD RF module—re-laid without altering the RF front end or protocol so it continues to pair seamlessly with the current firmware of the receiver. The primary goal of this spin is better build quality, with particular attention to two areas: tighter precision in signal transmission and improved on-board heat management. The board still has to accept 12 – 24 V trailer-plug power (including load-dump and transient spikes) and regulate it cleanly down to 3.3 V for the MCU. The present protection and buck stage work, but component placement and thermal performance can be improved. Some components are locked in for compatibility, and I will supply you the short list during kickoff; everything else may be ...

I’m building a two-layer, donut-shaped PCB around ESP32-WROOM-32U. The outer diameter must not exceed 92 mm, the inner cut-out must remain at least 54 mm, leaving the 19 mm wide ring as our only real estate. Please respect the antenna keep-out zone on the outer edge of the module. Inside that narrow ring we still need to route: Quectel L80 GPS on UART, a MAX98357A audio amp over I²S, a DS3231 RTC on I²C, an SPI-driven MicroSD slot, and a single raw copper touch pad positioned on the perimeter. Power comes from a USB-C connector that sits on the edge; horizontal or vertical placement is fine as long as it follows the board outline and brings out both 5 V and a regulated 3.3 V rail. You may work in EasyEDA or KiCad—either format is acceptable. Please apply the board ...

I need a PCB design for a mobile charger with the following specifications: - Fast charging capability - Universal compatibility - Compact and rectangular shape Ideal Skills and Experience: - Experience in PCB design - Knowledge of fast charging technologies - Familiarity with universal compatibility standards Please provide your portfolio and relevant experience.

I want to create a clean, classic-looking digital watch that quietly packs solid fitness features behind a minimal façade. The styling should stay timeless—thin case, simple dial, neutral colors, no flashy bezels—yet the internals must handle three core tasks: • Continuous heart-rate monitoring • Accurate step counting throughout the day • Automatic sleep tracking each night Your job is to design and prototype the complete device, covering electronics, firmware, enclosure and strap geometry. Low-power components, efficient firmware and a straightforward two-button or touchscreen-tap interface will keep the user experience elegant and the battery life sensible. Please deliver: • Schematics, PCB layout and full BOM • Embedded code with c...

Arduino Firmware Bug Fix & Mock-Up Update Project Overview I am looking for an experienced Arduino firmware developer to identify and fix existing errors in my device firmware. The project is straightforward: the hardware is already developed, and the source code is available. I only need an expert to review the firmware, locate the bugs, implement the necessary fixes, and provide an updated mock-up or demonstration of the corrected functionality. Scope of Work Review the existing Arduino source code Identify firmware bugs and logic errors Fix all discovered issues Improve code stability where necessary Provide updated source code Provide a simple mock-up, demonstration, or proof of successful operation Briefly document the changes made Requirements Strong experience with Arduino de...

I already have working Arduino- and ESP32-based boards; what I need now is a reshape of the boards to a custom shape and should have little effect on the traces. you’ll focus on redrawing the board outline, adjusting keep-outs, and nudging traces so manufacturing remains trouble-free. I will supply the current schematic, board file, and a vector image of the geographic contour. You return updated design files (Altium or KiCad preferred, plus universal Gerbers) and a quick 3D render so I can visualize the new silhouette. Acceptance criteria: • Board outline matches the supplied country & continent vector within ±0.2 mm • No DRC errors at standard PCB thickness settings • Gerbers pass JLCPCB pre-check without modification If this sounds straightfo...