Jelfeldolgozás Jobs

I have a custom, in-house firmware written entirely in C/C++ that now needs to establish a reliable 4G data link through a Sierra RC7620-1 modem. The goal is simple but critical: once powered, the modem must complete its full handshake, register on the LTE network, raise data service, and pass raw data streams to the firmware without manual intervention. You will work directly on the initialization sequence (power-up timing, AT command flow, SIM and APN setup, PDP context, error recovery) and expose a clean C/C++ interface that my application layer can call for connect, send, receive, and disconnect. All code must compile on our existing tool-chain and be written with portability in mind; the modem itself is connected over UART. Deliverables (acceptance criteria) • Source file...

I need a production-ready printed circuit board for a compact consumer-electronics tracker. The board has to combine Bluetooth connectivity for smartphone pairing, GNSS positioning for global location data, a LoRa module for long-range updates, and a 3-axis motion sensor to wake the unit only when it moves. Everything will run from a single rechargeable battery, so careful power budgeting and a low-power microcontroller are essential. Form-factor will be small enough to slip into a key-tag style enclosure, so component height and antenna placement must be considered from the start. I’m flexible on the exact silicon—Nordic, Espressif, STM, Semtech, etc.—as long as you can justify part choice against current draw, cost and global availability. Please take the design from ...

I have several gigabytes of raw complex I/Q captures taken across C, X, Ku, Ka and millimetre-wave bands, and I need the information hidden inside them extracted within a week. The job starts with demodulating the bursts, moves through full protocol reversing, and finishes with packet-level inspection that pinpoints the signal type, service provider and any network identifiers. Scope of work • Focus on satellite and MMWave waveforms—no vendor documentation is available. • Wireshark is the preferred environment for final packet dissection; use any supporting tools you like (GNU Radio, URH, inspectrum, etc.) along the way, provided the workflow remains reproducible. • Convert the raw I/Q into clean baseband, map the frame structure, decode the traffic and load it ...

Hi, here is the complete project Objective Design and simulate a compact microstrip patch antenna Target specifications: - Frequency: 2.45 GHz (ISM band - Size: < 15-20 mm (very compact - Thickness (substrate): < 0.8-1 mm - Type: Miniaturized Simulation requirements: - Achieve S11 < -15 to -20 dB at ~2.45 GHz - Impedance matching to 50 ohms - single clear resonance (no multiple unwanted dips Deliverables: - Final CST project file (.cst - S11 plot (1-5 GHz range - Timeline: - Need completion within few hours (urgent Please let me know once you review this and if we can proceed, I'lI confirm immediately. Thank you.

Project Title: Computer Vision Expert for Eye Motion Detection (Mobile App - Closed-Eyelid Tracking) Project Overview We are looking for a highly skilled Computer Vision / AI Developer to build a specialized motion detection module for a mobile application. The core objective is to detect and quantify eyeball movements by analyzing video footage of a subject’s closed eyelids. Technical Challenge: "Bulge Tracking" Unlike standard pupil tracking, this project requires analyzing the movement of the eyeball "bulge" underneath the closed eyelid. The solution must be hardware-agnostic, working with standard smartphone RGB cameras under normal lighting conditions, without the need for specialized IR sensors. Key Deliverables & Requirements 1. Motion Detection: Identi...

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Motion Sensor Analysis (Mobile App) Title: Mobile Developer: Sensor Fusion & Signal Processing for Gait & Balance Analysis. Project Overview: We are looking for a Mobile Developer specialized in signal processing to develop digital balance and gait assessment tests (specifically the Digital Fukuda Stepping Test) for a vertigo-related smartphone application. Connection to Vertigo: Vertigo impairs balance and orientation. By recording body deviation and rotation during specific tests, we provide clinicians with critical data on vestibular health. Key Responsibilities: 1. Mobile Sensor Fusion: Capture real-time data from the smartphone's gyroscope and accelerometer while the device is worn by the user. 2. Digital Fukuda Test: Implement an algorithm to calculate the precise Angle...

Expert Mobile Developer: Infrared Eye-Tracking & Nystagmus Detection (Computer Vision). Project Overview: We are seeking a high-level Mobile Developer/Computer Vision Engineer to build a specialized module for a vertigo diagnostic support application for smartphones. The core task is to capture and analyze Nystagmus using the device's internal infrared sensors. Scientific Context: Nystagmus is an involuntary, rhythmic oscillation of the eyes caused by vestibular (inner ear) dysfunction. While vertigo is the subjective sensation of spinning, nystagmus is the objective clinical evidence. Capturing this in total darkness is essential to prevent "visual fixation" which can suppress the symptoms. Key Responsibilities: 1. Mobile IR Capture: Access internal IR sensors (e.g., i...

I’m building a single-phase grid-tie solar inverter around the STM32F103 and need both the hardware completed and the firmware written. The control board must handle MPPT, keep perfect grid synchronization, and expose real-time data for remote monitoring. Firmware requirements • Implement a reliable MPPT algorithm suited to PV strings. • Keep the inverter phase-locked to the utility, injecting power with a clean sinusoid and rapid anti-islanding response. • Expose operating metrics (voltage, current, power, temperature, fault states) through Modbus, CAN bus, and Ethernet. Hardware requirements • Schematic and PCB layout for the STM32F103 control board, opto-isolated gate-drive interfaces, sensing circuitry, surge protection, and communication ports. ...

I’m refining a set of custom boards that combine an FPGA-based signal generator with several ESP32 modules. The immediate gap is in analog and digital circuit design: I need a fresh set of eyes to review, debug, and improve the front-end and conditioning stages so our multi-channel waveforms stay clean from kHz up into the low-MHz range. You will also find yourself touching the programmable logic; I use both VHDL and Verilog, so fluency in either (or ideally both) is welcome when tweaks to the signal-generation core are required. On the microcontroller side each ESP32 handles data processing, manages communication protocols, and drives attached peripherals, all written in C/C++. Expect to dive into that firmware whenever hardware changes ripple upward. Key objectives • A...

I’m developing a smartwatch-style device and need a compact micropatch (microstrip patch) antenna that operates reliably at the 2.4 GHz Wi-Fi/Bluetooth band. The form factor has to suit a wearable, so low profile, light weight, and body-proximity tolerance are all important. What I need from you: • A complete electromagnetic design of the patch, dimensioned for common FR-4 or flexible substrates and tuned for 50 Ω matching at 2.4 GHz. • Full-wave simulation files (HFSS, CST, ADS, or similar) showing S11 below –10 dB, realistic radiation efficiency, and a clear far-field pattern when mounted on a small ground plane typical of a watch. • Fabrication-ready outputs—layout, Gerber/ODB++, and a concise design report explaining the stack-up, matching me...

**Title:** IoT Hardware Engineer / PCB Designer Needed for Smart Water Tank Level Monitoring Device **Description:** We are looking for an experienced **IoT hardware engineer / PCB designer** to help us design a **smart water tank level monitoring device** for residential, building, and remote-site use. The product will measure the water level inside a tank and send alerts when the level becomes **low**, **high/full**, or when there is a **sensor/device issue**. We are seeking a professional who can take this from **system architecture and component selection** to **schematic, PCB layout, and manufacturing-ready files**. **Preferred product direction:** * Non-contact level sensing (preferably **ultrasonic**, top-mounted) * **Wi-Fi version** for homes/buildings * Optional **NB-IoT / LT...

I have completed the experimental portion of a Signals & Systems lab that centres on sawtooth-waveform reconstruction, and I now need a polished report plus clean, well-commented MATLAB code. The main tasks are: • Write or refine the MATLAB scripts that reconstruct the sawtooth waveform, solve the accompanying analytical equations, and produce publication-quality plots. • Turn the work into a concise report written in clear technical English. The report must be structured as follows: – Introduction and Theory – Methodology and Code (with code excerpts and explanations) – Results and Analysis (figures embedded and discussed) I will review your past experience with similar signal-processing or MATLAB projects, so please highlight that background wh...

I need a matched transmitter-receiver pair built around a 200 kHz carrier that can cover at least 40 m in open air and recognise simple OOK (On-Off Keying) pulses reliably. The intended application is “Radio Frequency RF”, so there is no higher-level protocol to worry about; raw, clean carrier switching will do the job. Everything will be mounted and operated outdoors, so the design must tolerate ambient temperature swings, sunlight and occasional moisture without detuning or loss of sensitivity. Both TX and Rx are separate not transceiver and battery powered with minimum 2 days running time. What I am looking for • Circuit-level design of both the low-power transmitter and the super-regen/ super-het (designer’s choice) receiver, including complete schematics, PCB...

I need an interface connector for carrying sensor readings from Ultrasonic datalogger by Modbus cable RS-485 with a male connector. The PCB interface is to be built with a 6-pin military female connector at one end and printer cable connector at the other end that will be used to connect to a laptop USB port to download the data (Refer to picture attached). Requirements: - Use a female 6 pin military connector (standard adapter) for the military connector and a female print cable connector on the other end, with PCB in between - No custom cable is needed - Ensure compatibility with Modbus protocol - Encapsulate the PCB into aluminium pot or similar for robustness Ideal Skills and Experience: - Expertise in Modbus communication - Experience with military and printer cable connectors - ...

I need a complete high-frequency trading (HFT) strategy for actively-traded equities. The solution must be built around three data pillars that I already have in place: extensive historical tick data for back-testing, a low-latency real-time market feed for live decisions, and curated news feeds for event-driven signals. Your job is to transform these inputs into a production-ready strategy that can ingest the streams, react within microseconds, and handle the entire trade life-cycle—from signal generation through execution and risk checks—without human intervention. Deliverables • Strategy logic and mathematical model, fully documented • Back-test framework wired to my historical data, with reproducible results • Low-latency execution module that plugs...

I need a full on-site Wi-Fi survey carried out in a commercial building using an Ekahau Sidekick and the latest Ekahau software. The sole objective is to capture accurate signal-strength data throughout the premises so I can visualise coverage, spot dead zones, and back up any upgrade decisions with hard numbers. During each walkthrough please log not only RSSI values but any factors that could be degrading the signal. I am particularly mindful of three common culprits—electronic devices that radiate noise, structural obstacles such as reinforced walls or tinted glass, and neighbouring networks that may be crowding the same channels—so be sure these are annotated in the project file. At hand-off I expect: • The complete Ekahau project file (.esx) with all raw measureme...

Need help for two questions cadence spice simulation budget 30$ plz check the attachment

I am building a grid-tied solar inverter and need a seasoned embedded designer to deliver complete, production-ready firmware for both an STM32F103 and a TMS320F28035. The inverter must connect seamlessly to the grid, track maximum power from the panels, report its status remotely, and shut down safely if it detects islanding. To achieve this you will configure and optimise the following on the STM32: • ADC – fast sampling of panel and grid voltages/currents for control loops • PWM – generation of high-resolution switching signals for the full-bridge stage • UART – bidirectional link for remote monitoring, logging and field updates On the TMS320 you will implement the high-speed control algorithms (MPPT, PLL, anti-islanding logic, grid-synchronis...

I have a Python script that controls an antenna array and performs object detection with a basic Hamming-windowed FFT. While it works, the range resolution is still too coarse for my needs. I began experimenting with the MUSIC algorithm and even toyed with the idea of adding a continual-learning loop, but I would like a cleaner, expertly implemented solution—whether that is MUSIC, ESPRIT, a refined windowing strategy, or any other modern signal-processing method you can justify. Here is the current landscape: • Language & stack: Python with NumPy, SciPy and Matplotlib. • Key variable: signal-processing methods drive the entire detection chain, so any change must integrate cleanly with the existing pipeline. • Desired outcome: a measurable, demonstrable improve...

Our client runs a call center with Nigerian agents calling US businesses. They need a Python script that makes the agents' accent sound more neutral and clear to American ears in real time during live phone calls. The hard part is already done. There is a fully built Node.js server that handles the live call audio. We just need you to write one Python script that plugs into it. What the script needs to do: Receive live audio from the server, process it through a voice conversion model to soften the Nigerian accent, and send the processed audio back. The whole process must happen in under 150ms so the conversation feels natural with no delay. Tech details: Audio comes in as mulaw 8kHz chunks. You can resample internally for better model performance then convert back before sending ...

Project Title: ESP32-Based Smart Healthcare Monitoring Device PCB I need a custom PCB design for a portable patient health monitoring system. Main Controller: * ESP32 Dev Module (30-pin) Power System: * 18650 Li-ion battery * TP4056 charging module with protection * MT3608 boost converter (output 5V) * On/off power switch * USB charging port (Type-C or Micro-USB) * Proper power routing for stable 5V and 3.3V Sensors: * MAX30102 (Heart Rate + SpO2) using I2C * SDA → GPIO21 * SCL → GPIO22 * DS18B20 Temperature Sensor * DATA → GPIO4 with 4.7kΩ pull-up resistor Display: * 2.8” or 3.5” TFT Touch Display (ILI9341 + XPT2046) * SPI pins: * MOSI → GPIO23 * MISO → GPIO19 * SCK → GPIO18 * Control pins: * TFT_CS → GPIO5 ...

I need a microcontroller-based motor controller for a BLDC motor using Field-Oriented Control (FOC). The system should incorporate encoders as sensors. Key requirements: - Control a BLDC motor - Implement FOC - Utilize encoders for feedback Ideal skills and experience: - Expertise in FOC and motor control - Experience with encoders and microcontroller programming - Background in embedded systems and electronics Please provide relevant work experience in your bids.

I already own the gear for my new show—Shure dynamic microphones and a pair of small-format mixers—but I need everything wired, gain-staged, and ready to record. The job is straightforward: assemble the signal chain, dial in healthy levels on the mixers, eliminate any hum or hiss, and run a quick test recording so I know the rig is solid before my first episode. You will be working only with the hardware; the recording software is installed and will be launched just for monitoring and a short capture check. I’ll have all cables, stands, shock mounts, and pop filters on hand. Deliverable • Fully connected microphone-to-mixer setup, labelled and tidy • Channels balanced, EQ and basic compression set for spoken-word clarity • One clean, clipped-...

I’m ready to commission a complete options-and-futures trading system that runs from AmiBroker (AFL) or an equally robust environment and fires orders automatically through the broker’s API. The core requirement is end-to-end automation: data ingestion, signal generation, strike-price selection, and live order execution for both call and put positions. What I need you to build • A rule-based strategy geared toward high-probability swing trades. • Dynamic strike selection driven by option Greeks (Delta, Vega, Gamma, Beta), Open Interest, and supporting indicators you find statistically significant. • AFL code (or alternative language you propose) that seamlessly connects to the broker’s API and sends/monitors orders without manual intervention. •...

I’m developing a commercial product that relies on a set of interactive elements—speakers, sensors, and LED displays—and I need clean, production-ready schematic diagrams that tie them all together. The core of the job is translating my functional requirements into well-documented circuitry that in-house team can follow without second-guessing pinouts, signal paths or power budgets. This is an interactive piano that plays audio files. You’re free to work in whichever design environment you’re most comfortable with—Altium, KiCad, Eagle, OrCAD, or any other professional tool—as long as the resulting files can be shared in their native format plus PDFs for quick reference. What I expect from you: • A complete, logically organised schematic sho...