Microcontroller jobs

Project Brief: Stealth-Mod...product. • The functionality must be fully automatic. No user interaction should be needed after parking. • No visible alterations (e.g., wires, unusual controls, abnormal movement patterns). • Power should remain efficient — preferably still battery-powered or with a hidden upgrade that doesn’t draw attention. Ideal Freelancer Profile: I’m looking for someone with experience in electronics, microcontroller programming (e.g., Arduino), or embedded systems. Ideally, you’ve worked with consumer electronics, automotive modifications, or smart devices before. Both functionality and stealth are equally important for this project. ⸻ Let me know if you have questions or need specific details (such as device models). ...

The embedded system comprises 2 STM32 boards connected to their own 7 sensors, 1 motor, and 3 relays. Each is connected to the central Raspberry Pi 4 board. The RIGHT STM32 board also has a TFT ST7789 2inch display. The Raspberry Pi has its own 5-inch display (connected via HDMI) and is connected to a battery BMS via UART and controls the ON/OFF sw...system driven via a 48V 10A relay. The Raspberry Pi also controls the operation of a 5V air-pump via a relay able to deliver 1.5A We require the following tasks to be carried out: user interface (GUI) developed for the STM32 to drive the ST7789 display. developed for the Raspberry Pi display. for the Right-leg STM32 microcontroller. for the Raspberry Pi. for the Left-leg STM32 microcontroller.

I need a compact, two-layer PCB whose sole job is to host an IR proximity sensor on one side and a WS2812-compatible LED visible on the reverse. A connector should allow these components to be connected to a separate microcontroller board. Key points to keep in mind • LED type: WS2812B but open to your suggestion • Sensor type: IR proximity sensor, e.g. VCNT2020 but open to your suggestion • Control method: the LED and sensor trace terminate on a connector so an external board can switch it. No on-board logic is required. • LED should be visible on the reverse side of the IR proximity sensor, so either should be mounted on the reverse or use a reverse-mounted LED • Board should be as small as feasible but still be easy to manufacture. If needed the desi...

I’m putting together a small interface that lets a 5 V...optocoupler stage, any necessary current-limiting or pull-down components, fly-back diode protection for the 12 V coil, and the wiring to the relay board. • A bill of materials with exact part numbers so I can order everything immediately. • A short design note (a page or two is fine) explaining the current calculations, isolation boundary, and how the transient suppression is handled. My microcontroller pin can only source a few milliamps, so please size the input resistor accordingly. If you can include oscilloscope screenshots or a quick SPICE plot verifying clean switching, that would be a nice bonus but it’s not mandatory. Looking forward to a straightforward, well-documented solution that I can dr...

I’m building a wearable exoskeleton and need a dedicated PCB that brings all core electronics onto one compact board. The board must integrate: • Microcontroller • DC-DC converter • LDO regulator • IMU • Operational Amplifiers • JTAG header • All required connectors for power, sensors, and external actuators Scope of work 1. Schematic capture with component selection that balances size, efficiency, and heat dissipation. 2. PCB layout optimized for a tight wearable form factor—minimal footprint, clear signal integrity, and robust grounding. 3. Generation of manufacturing deliverables: Gerber files, assembly drawings, pick-and-place files, and a complete BOM. 4. Design review iteration to address any EMI/EMC or rou...

Assalam o alaikum, I am looking for electrical engineers having expertise in following areas:  Embedded C Programming.  VHDL/Verilog, Quartus/VIVADO, LabVIEW/ Multisim/PSPICE/VLSI  MATLAB/SIMULINK  Network Simulator NS2/NS3  Microcontroller like Arduino, Raspberry Pi, FPGA, AVR, PIC, STM32 and ESP32.  IDEs like Keil MDK V5, ATmel studio and MPLab XC8.  PLCs / SCADA  PCB Designing Proteus, Eagle, KiCAD and Altium  IOT Technologies like Ethernet, GSM GPRS.  HTTP Restful APIs connection for IOT Communications. Actually I have multiple projects in different domains of electrical engineering and I already have a team of engineers working on them but due to workload I am looking for few more engineers to be a part of my team and work with us on regular basis.

A NRF52 based low power consumption BLE tag with 4G and GPS capabilities. Features: Microcontroller: NRF52, any GPS + 4G module operable in south america Power Supply: Lithium-ion Battery (600mAh+, auto-switching) Communication: Bluetooth + GPS + 4G Additional Components: RGB LED and Buzzer Reprogramming Method: SWD The board must consume the absolute minimum power (~10uA) until GPS + 4G is enabled via software.

I am looking for a freelancer to design both the schematic and PCB layout in KiCad for an embedded hardware project. Project overview The board will include: -> STM32 microcontroller (H7 series preferred, but open to suggestions) -> Ethernet switch with 3 or more ports ---> One port connected to the STM32 using RMII ---> Two other ports connected to SFP sockets -> The Ethernet switch can be Microchip KSZ8873 or a similar compatible device -> No high-speed requirement: ---> 10 Mbps is sufficient ---> 100 Mbps is more than enough Firmware requirements -> Firmware does not need to be complex -> It is sufficient to: --> Enable the Ethernet controller using STM32CubeMX --> Load a basic example so the board responds to PING -> No application-leve...

...report writing. Day-to-day work will range from breadboard-level prototyping to full simulation and verification, so the stronger your foundations in analogue and digital design the better. The tasks you’ll tackle typically start with a concept sketched in Proteus or Multisim, move into schematic and PCB work in Altium, and finish on the bench or in a virtual lab via LabVIEW or TinkerCAD. Microcontroller and embedded targets rotate between Arduino-based boards, Raspberry Pi modules, and mid-range FPGAs, so comfort switching among those platforms is essential. Core expectations • Design or refine circuits and document the rationale behind every component choice • Build and verify MATLAB/Simulink models that correlate with hardware behaviour • Prototype...

...real-time input pipelines Test directly on Xbox or PlayStation consoles (physical hardware required) Optimize for snap, lock, weld, and track behavior with precise joystick control Debug latency, drift, misalignment, and tracking edge cases Required Experience (Must Have) Cronus Zen experience (scripts, HID behavior, real-world tuning) Ownership of Xbox or PlayStation console for live testing Microcontroller experience (Arduino-class or higher) Strong background in computer vision (YOLO or similar real-time detection pipelines) Experience with transparent overlays (Windows overlay windows, layered rendering, etc.) vGamepad / XInput / virtual controller experience Comfortable debugging timing, latency, and signal stability Strongly Preferred Experience with real-time CV + joystick...

...System will run on a low-power microcontroller (ESP32/Arduino acceptable), read soil and weather data, and autonomously schedule irrigation while managing a small photovoltaic battery budget. A simple web or mobile dashboard should visualise the data. Alongside these flagships, my lab is experimenting with plant-disease image classifiers, self-driving delivery rovers (ROS2, SLAM, path-planning), and GPT-style tutoring chatbots. Each module will be treated as a separate milestone, yet adhere to the same quality bar. Deliverables • Clean, well-documented source code in public or private Git repos • Training notebooks, inference scripts, and hardware-in-the-loop tests where relevant • Deployment instructions for Ubuntu 22.04 or the target microcontroller...

I'm looking for a skilled hardware engineer with firmware experience to design a control system for a domestic heating product. Key Responsibilities: - Design microcontroller and power supply components - Develop basic control logic firmware Ideal Skills and Experience: - Expertise in microcontroller and power supply design - Firmware development proficiency, especially in basic control logic - Experience in temperature control systems is a plus

I need a 4-layer PCB layout that will drive a new consumer-electronics device. The board footprint is roughly 8 inches on its longest side and must sail through my manufacturer’s DFM/DFT checks without a single revision request. Core circuitry includes a microcontroller at the heart, a collection of digital and analog sensors, Wi-Fi & Bluetooth modules, a microphone, speaker, relay, display interface, GUI memory and associated logic. Please route with proper impedance control, isolation for the RF section, and attention to audio trace integrity so that EMI is kept to a minimum. Deliverables • Full Altium, KiCad or Eagle design files (your choice) • Gerber, drill, pick-and-place and BOM ready for turnkey assembly • Layer stack-up, controlled-impedan...

Hi James! Looking to learn how make a therm...Looking to learn how make a thermal printer camera work. My partner and I have not got much experience with electronics and am looking to get a basic prototype made so we can tinker with it and gain an understanding of how it all works. This is an ongoing project for my partner and I and we would be stoked if you could help us out. From our understanding we just need the thermal printer to a microcontroller and image capture, and getting it to print an image when a button is pressed. We want to use the prototype to learn from ourselves and would be really grateful if you could also talk us through how it's all working. Thanks so much! Not sure if this is even totally your ballpark, but we thought you looked great and would love if ...

PCB Design Review Required (ESP32-S3 Based Board) I am looking for an experienced electronics / hardware engineer to review my PCB design and provide detailed feedback. Scope of Review: Schematic correctness PCB layout review (top & bottom layers) Power supply & grounding ESP32-S3 pin usage & constraints Signal...Provided: Schematic (PDF) PCB layout images Gerber files (ZIP) Component list (if needed) Expected Output: Written review with clear points Highlighted issues (critical / medium / minor) Suggestions for corrections & improvements Go / No-Go recommendation before fabrication Budget: ₹1000 (fixed) Quick review preferred (1–2 days). Required Experience: Strong PCB design background ESP32 / microcontroller boards experience Able to explain issues clear...

I’m ready to move from concept to production on a dedicated pump control panel and need a specialist who can take charge of both the hardware and the embedded code. The electronics must be laid out in Altium Designer, and the firmware written for a PIC microcontroller—my platform of choice for this project. The unit will be installed in a dusty setting, so component selection, conformal-coating guidance, and protective routing practices should reflect that environmental challenge. I can share schematics of earlier prototypes as a starting point or we can work from a clean sheet if you prefer. Once the electrical design is firm, I’ll need you to develop and thoroughly comment the PIC firmware, then walk me through flashing and in-circuit debugging so I can mainta...

...(video or repo links) of student projects you have supervised that involve multiple sensors and clean, well-commented code • Your availability for 1- to 1.5-hour sessions • Any suggestions for low-cost components or kits that keep parts sourcing simple Other Technical Requirements: The training will focus specifically on the Arduino Nano microcontroller. The trainer must be proficient in working with the following components and sensors: Microcontroller: Arduino Nano. Sensors: Dual IR Sensors (Line Following), Ultrasonic Sensor HC-SR04 (Obstacle Avoidance), and LDR (Light Intensity Detection). Actuators: DC Motors with L298N/L293D Motor Drivers. Concepts: PWM Speed Control, Sensor Fusion, and Nested Conditional Logic. Key Learning Objectives: The student...

Project Overview We are developing an Event Logger Card (EVL) based on the Texas Instruments RM46 (Hercules Safety Microcontroller). I am looking for a senior embedded systems expert to assist with firmware development, hardware-software integration, and comprehensive testing of the EVL card. Key Responsibilities Develop and optimize firmware using Embedded C. Write and debug code within Code Composer Studio (CCS) 12.2.0. Implement event-logging logic on the RM46 controller, ensuring high reliability and data integrity. Perform hardware-in-the-loop testing and debugging for the EVL card. Assist in peripheral interfacing (SPI, I2C, UART) and memory management for logging data. Required Skills & Qualifications Expertise in Texas Instruments Hercules RM4x series (specifically RM46)...

I’m juggling several small-to-mid size projects built around PIC microcontrollers and need a specialist who can drop in, understand the hardware quickly, and produce clean, well-documented firmware. Most tasks revolve around straight microcontroller programming—setting up peripherals, writing ISR-driven code, optimising timing, and talking to common interfaces such as UART, SPI, I²C or CAN. The exact role may shift from one build to the next: today it could be a closed-loop control routine, tomorrow a lightweight data-logging module, and next week a simple communications bridge. Whichever path we take, the goal is always the same—robust code that compiles first time in MPLAB X, follows Microchip best practices, and ships with concise inline comments so I ca...

...deterministic, and safety-focused. I am looking for an experienced embedded / firmware developer to help implement the behavior engine, emotion logic, audio playback system, and mode handling on a microcontroller platform. Key Principles (Very Important) No AI No machine learning No free conversation No cloud processing of voice Rule-based, predictable behavior Offline-first system Emotion-driven reactions Child-safe & privacy-safe design If your expertise is mainly in chatbots or AI assistants, this project is not suitable. Hardware & Platform ESP32 / similar microcontroller Microphone (sound level & pattern detection only) Speaker (real audio playback, not buzzer) Display for expressive eyes Optional touch input SD card or Firebase O...

...please design for the full 3.0 V–4.2 V range. • All components must be surface-mount parts that are widely available. • Any microcontroller, timer, or driver IC is acceptable as long as it meets the frequency accuracy and low-power requirements; include programming header footprints if firmware is needed. • Keep EMI low and motor startup current in check, using proper decoupling and FET selection. Deliverables 1. Complete schematic (PDF + original CAD). 2. PCB layout files and Gerbers ready for JLCPCB/Seeed. 3. BOM with manufacturer part numbers and one alternative for any critical item. 4. Firmware source and compiled binaries, if a microcontroller is used. 5. Simple test procedure confirming the four preset frequencies, the 20-minu...

The charger for my 48 V–84 V electric two-wheeler needs a small-footprint program that drives six LEDs: one shows the charger is powered, four step through 25 %, 50 %, 75 %, 100 % while the battery fills, and the last one lights up whenever the system detects a fault. The logic has to run autonomously on a low-cost microcontroller that you choose and size, keeping component count minimal so the design stays production-friendly. The job covers complete firmware (well-commented source and compiled hex), a clear pin map for the six indicators, and a brief test routine I can run on the bench to prove each LED triggers at the right voltage thresholds and fault flag. Hand me a schematic snippet or wiring diagram showing the MCU, divider network, fuse tap, and any protection parts...

Project Title: ESP Microcontroller Coding for Pressure-Based System with Motion Sensors & Air Control Project Description: I am looking for an experienced embedded systems / IoT developer to assist with firmware coding and control logic for a hardware-based prototype. The project involves programming an ESP microcontroller to integrate pressure sensing, motion sensing, and air control components. The system should read sensor data in real time and control an air pump and solenoid valve based on predefined logic and conditions. Key Components Involved: ESP microcontroller (ESP32 / ESP8266 – open to recommendation) Pressure sensor(s) Accelerometer & gyroscope (IMU) Air pump Solenoid valve Relays / motor drivers (if required) Basic power management...

I need software to control laser pulsing and modulation using a microcontroller GPU. The control interface should allow for user manual input. Key Requirements: - Develop software for laser pulsing and modulation control. - User manual input interface for operation. Ideal Skills & Experience: - Experience with microcontroller programming - Knowledge of laser systems and control - Strong background in GPU software development - Ability to create intuitive user interfaces

...create a frequency counter with the following specifications: - Utilize the Nuvoton N76E003 microcontroller to accurately measure frequencies from 1 Hz to 1 MHz - Implement a 7-segment display to show the frequency measurements - Ensure the system is designed to be powered by an external power source (excluding batteries) Your responsibilities would include: - Developing the necessary software to enable the N76E003 to function as a frequency counter - Designing the circuitry that interfaces with the 7-segment display for accurate and clear frequency readings - Ensuring the overall system is reliable and efficient Ideal candidates should have: - Proficiency in working with the Nuvoton N76E003 microcontroller - Experience in developing frequency counters or similar measur...

I need to interface the Nuvoton MS51FB9AE microcontroller with the ADS1115 I2C ADC for high-resolution voltage measurement. Key requirements: - Use ADS1115 for 16-bit voltage measurement - I2C communication with Nuvoton MS51FB9AE - High accuracy and reliability Ideal skills and experience: - Experience with Nuvoton microcontrollers - Proficiency in I2C communication protocols - Familiarity with ADS1115 and ADCs in general - Strong background in embedded systems programming

..."night mode" and at that moment the auxiliary lights turn on automatically. If we additionally activate the right turn signal indicator, the right auxiliary light will turn off so that the turn signal has more prominence and oncoming drivers can better identify the action the motorcycle is about to make. Elements to Use: This is the part where I hope you can help me. We will use an ESP32 microcontroller. I would like it to have WiFi and Bluetooth, with a good amount of memory since it will have a web server running (for configuring the lights as the client needs) The system will have 6 output lines (15A lights, charging USB, rear light, etc.) Each line will be controlled by D4184 MOSFETs in parallel. It's important that the MOSFETs can operate with PWM so we can ...

Project Brief: Stealth-Mod...product. • The functionality must be fully automatic. No user interaction should be needed after parking. • No visible alterations (e.g., wires, unusual controls, abnormal movement patterns). • Power should remain efficient — preferably still battery-powered or with a hidden upgrade that doesn’t draw attention. Ideal Freelancer Profile: I’m looking for someone with experience in electronics, microcontroller programming (e.g., Arduino), or embedded systems. Ideally, you’ve worked with consumer electronics, automotive modifications, or smart devices before. Both functionality and stealth are equally important for this project. ⸻ Let me know if you have questions or need specific details (such as device models). ...

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...display and need a turnkey, production-ready design. An image of a similar commercial board is attached strictly for visual context; I do not own that design or its schematics. The board must run from a single 12 V supply and reliably drive Full-HD and 2K panels—4K support is highly desirable if you can integrate it without compromising cost or availability. You are free to choose whichever microcontroller, processor, scaler or companion ICs best meet these goals, provided they are readily sourceable and have a clear longevity roadmap. Deliverables • Complete schematic and annotated PCB layout files (Altium, KiCad, or equivalent) • Fabrication outputs: Gerbers, drill files, assembly drawings, stack-up, impedance notes • Fully commented firmware source, ...

...provided electrical safety, thermal margin, and connector accessibility are not compromised. 2. POWER SYSTEM Power Input Voltage: 5V DC Current: Up to 10A Connector: 2-pin screw terminal (5.08 mm) Protection (mandatory): Reverse polarity protection Polyfuse / blade fuse TVS diode Power Rails 5V: Servos, PCA9685, TMC2209 motor power 3.3V: ESP32, DS3231 RTC 3.3V Regulator: ≥600 mA (buck or LDO) 3. MICROCONTROLLER Module: ESP32-WROOM-32 Wi-Fi: Primary control Reset / Boot: EN + IO0 routed to UART socket 4. SERVO CONTROL SYSTEM (LOCKED) Drivers IC: PCA9685 Qty: 4 Interface: I²C Outputs Total Servos: 40 Zones (silkscreen mandatory): Zone 1–4 (10 servos each) Servo Connector (FINAL & SAVED) Type: JST-XH Pins: 3 Lock: Friction-lock Pitch: 2.54 mm Mount: Vertical, throu...

I need software to control and automate tasks via microcontrollers. Integration will be through a web application. Requirements: - Experience with microcontroller programming (e.g., Arduino, Raspberry Pi) - Strong skills in web application development - Ability to design user-friendly interfaces for automation tasks - Background in software-hardware integration Deliverables: - Web app for control and automation - Documentation for setup and usage - Support for initial deployment and troubleshooting Looking for someone with a robust portfolio and proven experience in similar projects.

...video must show: Power on Joint movement End effector (gripper or tool) operation Stock videos, YouTube links to other people’s projects, or simulations are not acceptable 2. Complete Project Documentation You must supply everything required to reproduce the project, including: STL files for all 3D printed parts Full parts list (BOM) with: Electronics Fasteners Motors / servos Microcontroller Wiring diagrams (clear and student-friendly) Fully working code (Arduino / Micro:bit / ESP32 preferred) Assembly instructions suitable for students 3. Classroom-Suitable Design The design must: Be robust and reliable (not fragile or temperamental) Use reasonably priced components Avoid complex calibration or tuning Be achievable with school-level tools and timefram...

...your app team What You Do NOT Need From the Freelancer This is critical to state explicitly. ❌ No app UI ❌ No backend ❌ No AI ❌ No cloud ❌ No stadium mesh ❌ No mass-production tooling ❌ No marketing fluff Just: Hardware + firmware + physical jersey integration Freelancer Scope (This Is the Job) 1. Hardware Design They must design: Small rigid PCB (not flexible) LED driver + microcontroller BLE module Battery management Magnetic charging contacts (sealed) On-board power button (or magnetic reed switch) Key constraints Fully sealed electronics (silicone or TPU encapsulation) Sweat + wash resistant Low profile, lightweight Battery sized for 2–4 hours active runtime 2. LED System LED type: addressable RGB (WS2812 / SK6812 or equivalent) LED layout: ...

1. Standardized Component List The following components must be used to ensure software and hardware compatibility across hub: Microcontroller: ESP32-C3-MINI-1U-N4. Main Buck Regulator: LM5164DAR (configured for 5V output). Logic Regulator: AP2112K-3.3TRG1 (3.3V LDO for MCU and sensors). USB-to-Serial: FT232RNL-REEL. USB Connector: USB4105-GF-A (USB-C). Precision ADC (New): 4x HX711 or 2x ADS1232 (24-bit resolution for 4 load cells). Protection: TVS Diodes on Power Input and 100V rated capacitors for the high-voltage rail. 2. Work Quality & Measurable Goals: The focus for this board is high-current stability for the servos and high-precision signal integrity for the weight sensors. Expected Work Quality: Power Rail Separation: The 5V servo rail must be tapped directly fro...

...system operates in a high vibration, moisture, and electrical noise environment (motor controllers, 60V battery system). This must be a robust, professional design — not a hobby board. System Overview Power Input: 48–72V DC (60V nominal lead-acid pack) Requirements: High-efficiency buck to 5V and 3.3V Reverse polarity protection Fuse + TVS + filtering EMI / noise protection --- Microcontroller ESP32 module with 4G (WROOM or S3 – engineer may recommend) --- Sensors / ICs SHT31 – Temperature + Humidity (I2C) DS18B20 – Battery temperature (1-Wire) YL-83 – Water / rain detection (Analog) INA226 – Voltage / current / power monitoring (I2C) --- Connectivity Locking connectors for power and sensors Programming / debug heade...

This project proposes the design and development of a fully integrated PCB-based GSM-enabled remote power control and monitoring system capable of switching high-voltage 110V/220V AC loads and monitoring three-phase electrical supply conditions. The system will be centered on a microcontroller platform functionally equivalent to Arduino, integrated directly onto a custom-designed PCB along with a GSM module, relay drivers, power regulation, and three-phase voltage sensing circuitry. Remote operation will be achieved via GSM (SMS-based control), allowing the client to securely switch loads ON/OFF without reliance on internet connectivity. The PCB will be engineered for industrial reliability, incorporating proper isolation between low-voltage control and high-voltage AC sections, pro...

I am working on a university hardware project in KiCad and I have a deadline in 5 days. I am looking for help with the hardware design only. The task is to design a microcontroller board using the following components exactly as specified: • Microcontroller: ATmega16 • 5 V voltage regulator: 7805 • Reset supervisor: MAX707 • RS232 level shifter: MAX232 • LC display: 4 × 20 character LCD, alphanumeric, monochrome, with LED backlight • Real Time Clock (RTC): RTC 72421 • I²C bus temperature sensor: DS1621 • ADC reference voltage: LT1009 • Chip-select decoder: GAL16V8 I only need: • the schematic • the PCB layout • and the 3D view

I’m building a smart-home device that tracks and optimises household energy use, and I need a seasoned IoT engineer to transform the concept into a production-ready printed circuit board. The board must combine a low-power microcontroller, several sensors for real-time measurements, and a wireless module for seamless home-network integration. You’ll be responsible for the full hardware path: selecting the right components, creating the schematic, laying out a compact multi-layer PCB, and making sure everything plays nicely with typical smart-home power rails. Signal integrity, thermal performance, and antenna placement are critical because the unit will sit inside a small plastic enclosure. To keep things clear, here’s what I expect as final hand-offs: • C...

I need a compact, microcontroller-based gateway that sits in-line on a CAN-FD bus and removes or forwards diagnostic frames according to rules I supply. The core of the design should be a device with native CAN-FD support (an STM32, S32K, dsPIC33 C, or any equivalent you recommend) paired with a standard FD-capable transceiver so the board can operate at 500 kbps arbitration and 2 Mbps data rates without external glue logic. Beyond the hardware, I also require firmware—written in C or C++—that initialises the peripheral, listens for every frame, and applies real-time ID filtering (e.g. allow 0x700–0x7FF, block all others). Filter rules must be easy to change over UART or USB so I can refine them in the field. Deliverables • Schematic, PCB layout (Gerber/...

I’m building a compact wearable that captures three core health metrics—steps, heart-rate, and SpO₂—and pushes them, in real time, to a companion mobile app written in React Native. I also want the watch to relay basic smartphone notifications (calls, t...both iOS and Android • Handoff & Testing – Source code for firmware and app, fully documented – Build instructions and a quick-start guide – Demo video or live walk-through proving real-time sync and notification flow If you’ve already integrated health sensors with Bluetooth LE or built React Native apps that stream live data, this should feel familiar. Let me know which microcontroller / sensor stack you prefer and any past examples of similar wearables you&rsqu...

Project Brief: Stealth-Mod...product. • The functionality must be fully automatic. No user interaction should be needed after parking. • No visible alterations (e.g., wires, unusual controls, abnormal movement patterns). • Power should remain efficient — preferably still battery-powered or with a hidden upgrade that doesn’t draw attention. Ideal Freelancer Profile: I’m looking for someone with experience in electronics, microcontroller programming (e.g., Arduino), or embedded systems. Ideally, you’ve worked with consumer electronics, automotive modifications, or smart devices before. Both functionality and stealth are equally important for this project. ⸻ Let me know if you have questions or need specific details (such as device models). ...

I’m putting together a microcontroller-based inverter for industrial equipment and need an engineer to translate my specs into a production-ready design. The goal is a rock-solid 300 W pure sine wave output, stepping from a nominal 350 V DC input down to 200 V AC. Low total harmonic distortion is essential because the unit will drive sensitive industrial controls. You are free to choose the MCU family you’re most comfortable with (STM32, PIC, MSP430, or similar) as long as the firmware is well-documented and the control algorithm delivers a clean sinusoid under varying loads. Efficiency, thermal performance and fault handling must be considered throughout the design. Deliverables • Complete schematic in Altium, KiCad or Eagle • PCB layout files ready for fa...

An obsolete microcontroller in my current hardware sends a stream of control commands over an undocumented UART link. I need those commands captured, fully decoded, and then reproduced from an Arduino so I can drive the target board without the original controller in place. This is a TCU controller from the 1990's that is obsolete. We need to document one-directional serial commands that command a display to display selected gears, error messages, etc. Scope • We will provide captures from a lonely binary logic analyzer using Saleae Logic 2. We can also possibly provide on-demand oscilloscope readings. • Analyse the byte structure: headers, payload, checksums, timing gaps, any hand-shaking characters. • Document the command set clearly enough that I can unde...

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Developing the electronics for my new smartwatch, I now need the PCB layout completed to production-ready quality. The board must fit a typical round or squarish wearable footprint, so every millimeter of routing, component placement, and layer stack-up counts. The circuit has already been captured; your task is purely the layout. It has a main microcontroller, several low-profile sensors, and a Bluetooth module that will share limited RF-friendly real estate with the antenna. I’ll supply the schematic, mechanical envelope, and preferred connector locations as soon as we start. I’d like to partner with an engineer based in the U.S. who has already taken at least one watch or fitness tracker board through fabrication—someone comfortable balancing high-density ...

I need an experienced STM32 programmer to assist with a robotics project. The microcontroller in use is from the STM32F series. Key tasks include: - Embedded system development - Peripheral interfacing Ideal skills and experience: - Proficiency in STM32F series - Strong background in robotics and embedded systems - Experience with peripheral interfacing and firmware development Please provide examples of previous work in robotics and STM32 programming.

I have a small board built around an STM32 microcontroller (STM32L010F4P6) and I simply need firmware that drives two standard 5V fans from PWM output. The speed of the fan should be adjustable with the PWM output (5 different settings). There is a push-button that will be used to change the speed when pressed. There is also a simple RGB LED controlled with 3 outputs. There is also a battery charger (BQ25895) that we need to configure or read the battery voltage from, but nothing special. This should be a very simple and quick project to someone with the proper experience. I need somebody who has done STM32 projects before and who can complete that project quickly, ideally within a few days. I will provide schematics and all relevant details to the selected candidates. I will...

...Prevent solenoid from staying open too long Cooldown or max activation time protection Nice to Have (Optional / Bonus) Simple config file for mapping gifts → actions Console logs showing: Donation received Command sent Arduino confirmation Ability to easily add more relays later Tech Stack Preference Tikfinity (existing platform) Node.js or Python for event handling Arduino C/C++ for microcontroller code Serial communication over USB Deliverables Working integration (Tikfinity → Arduino) Source code with basic documentation Clear setup instructions (how to run, how to change mappings) Arduino sketch ready to upload Use Case Example During a TikTok Live: Viewers donate to “Team A” or “Team B” Each donation briefly opens a sol...

...Multiplexer: 16-channel analog multiplexer/demultiplexer, controlled by 4 select lines (typical CD74HC4067-style behavior). Enable behavior: The MUX EN pin is wired to “-” (ground), meaning the multiplexer is permanently enabled (active-low enable held low). Channel scanning: All 16 channels (commonly referred to as C0–C15) must be scanned cyclically to form each complete 16-sensor frame. 5) Microcontroller and pin mapping (fixed) MCU: Raspberry Pi Pico W, running MicroPython. ADC input (fixed): GP28 / ADC2 is used as the single analog measurement input. MUX select pins (fixed wiring): S0 → Pico physical pin 4 → GP2 S1 → Pico physical pin 5 → GP3 S2 → Pico physical pin 6 → GP4 S3 → Pico physical pin 7 → GP5 Thes...