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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...

For a Spanish speaker in Barcelona! I am bringing together a compact laser platform and an FPGA-based control board here in Barcelona, and I need an engineer who can sit beside the hardware, plug in the scopes and power rails, and push the overall performance to its limit. The work is squarely at the crossroads of optics and digital electronics: you will be aligning the laser path with a set of optical sensors, tightening the signal chain that feeds the onboard FPGA signal processors, and making sure the power supplies deliver exactly what the photonics and the logic fabric demand—no more, no less. What I expect you to drive: • Physical and electrical integration of the laser module with the FPGA board • Low-noise routing between optical sensors and high-speed signal...

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 ...

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...

Project Overview: We are building a data analysis platform and require a Computer Vision / Digital Signal Processing expert to implement a server-side automated motion analysis engine. The frontend application layer is already complete and successfully uploads a cropped "eye-strip" video (focusing strictly on the eye region) directly to our server backend. Your Task: you will leverage existing open-source frameworks (such as OpenCV contour tracking, MediaPipe Iris, or similar established eye-tracking libraries) to build a highly reliable server-side script (Python preferred). This script must trigger automatically upon video upload to process the cropped video frame-by-frame. Core Technical Deliverables: 1. Object Tracking & Noise Filtering: Utilize MediaPipe Iris or OpenCV...

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 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 want to design a high gain antenna. Even amplitude excitation leads to side lobe levels no better than -13.26 dB. I want uneven amplitude excitation using chebyschev distribution. Also, cross polarization should be less than -40 in all phi cut.

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 have a 7–8-minute recording from a preliminary hearing, provided on CD, that must stand up to legal scrutiny. Your assignment is to carry out a full forensic examination that proves (or disproves) the file’s integrity, pinpoints any signs of tampering, and identifies possible deletion or insertion of segments. The work should cover spectral, waveform, and metadata analysis using recognised forensic-audio software such as iZotope RX Advanced, Cedar, Audition (or equivalent). Every finding has to be documented with clear methodology so it can be presented in court and explained to non-technical audiences if required. Deliverables • A signed forensic report detailing procedures, tools, results, and conclusions on authenticity, tampering, and segment manipulation &bull...

I am looking for LTSpice expert who can deliver simulation result per project. It is not one time project and if you are good candidate, we can cooperate for a long time. Also, we have to work on slack. Budget: 20$/task, 2 tasks/every day. Please share your LTSpice experience.

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 am commissioning a full-featured vibration analytics and predictive maintenance platform dedicated to rotating equipment. The end product must run smoothly on both Windows and Linux, interface seamlessly with industrial vibration sensors, and stream data in real time. Core analytics Real-time FFT and spectrum analysis, envelope detection, bearing defect diagnostics, and automatic alarm generation are mandatory. The system should reference a built-in bearing database covering the major bearing types and models we see in the field, so users can jump straight from a fault signature to a likely root cause. Dashboards & visualisation Inside the application, I need rich, configurable dashboards that present data as interactive graphs and charts, heatmaps, and concise tables. Historic...