Elektronika Jobs

Description: "I need an expert Optical Engineer to provide a 100% functional technical plan for an aerial (floating) image display. ​I am looking for EXPERTS ONLY. Do not apply if you have not worked on HUD, AR, or aerial optical projection systems. ​Deliverables required: ​Optical Design: Define the exact path (e.g., Birdbath or similar) to project a clear aerial image at 15cm. ​Sourcing BOM (Must be from Chinese market): A detailed list of all required optical components (Micro-display, beamsplitters, mirrors, lenses). You must provide Part Numbers and direct supplier links (Alibaba/Chinese vendors) where these parts can be purchased today. ​Feasibility Guarantee: A technical report confirming that the selected components will work together to create the floating image. I need to kn...

Σύντομη περιγραφή αιτήματος Θα ήθελα να κατασκευάσετε μια συσκευή που να ενεργοποιείται με αισθητήρα αφής δέρματος (capacitive skin sensor), ο οποίος θα θέτει σε λειτο&upsilon...

I am expanding the C language so it speaks directly to microcontrollers, specifically the ARM family on the ARM-v8 architecture. The goal is a clean, lightweight extension that lets developers toggle ports, poll sensors, drive LEDs or motors, and handle real-time tasks simply by touching the right memory-mapped registers. The finished tool-chain must compile down to code that runs fast, in tiny footprints, with deterministic timing. Think of the kinds of binaries you would drop into washing machines, automotive modules, or medical devices—only here the target is any ARM-based microcontroller. You will provide: • A documented language spec describing new keywords, pragmas, or intrinsics that expose registers, GPIO, interrupt vectors, and timing primitives. • A working ...

I need a reliable local partner preferably a technician who can travel to a specific address in Bangalore, dismantle the item from a machine and dispatch it the same day through the courier /busservice I specify. No product inspection is necessary—simply pick it up, pack it securely, and send it off. I will share: • Full pickup address and contact person’s details • My preferred courier account information and waybill template • Recipient address and phone number Once the parcel is lodged, send me the tracking number and a clear photo of the shipping receipt so I can follow its progress. Timely collection and prompt hand-off to the courier are the only success criteria for this task.

Project Brief – Custom LoRa Wireless Button Trigger (USB Keyboard Device) Project Overview I am looking for an experienced embedded systems / hardware developer to design and build a custom wireless trigger system using LoRa communication. The system consists of: Handheld Transmitter (with button) USB Receiver (connected to a computer) When the button on the transmitter is pressed, the receiver should emulate a USB keyboard and send an ENTER key press to the connected computer. The device must be reliable and suitable for frequent use, therefore rugged connectors and proper enclosures are required. System Architecture The system will consist of two hardware devices. Wireless Range: At least 300-500 Meters Indoor. 1. Transmitter (Handheld Remote) A compact handheld remote devic...

I need a rotating wheel mounted on a center-column. I have 8 plastic flag sockets that need to be bolted to the edge of the wheel. The whole thing needs to spin at variable speeds and move up and down about 5 inches while it's turning." 1. Project Overview Construction of a floor-mounted training device for flag football. The machine features a rotating horizontal wheel (waist-high) that holds multiple flag "poppers." The device requires two simultaneous motions: continuous rotation and vertical oscillation (bobbing up and down). 2. Technical Specifications * Target Height: Fixed at 30–36 inches (waist-high). * Rotational Motion: * Variable speed control (approx. 0–60 RPM). * Drive must handle 5 distinct speed presets. * Vertical Motion (Oscillatio...

I have a straightforward first release in mind for a lightweight digital-compass application written entirely in Kotlin. The core of this version is a clean, minimalistic interface that shows the user the magnetic-north bearing in real time. Accuracy and smooth needle movement are essential, so solid experience with Android’s sensor framework (SensorManager, Sensor.TYPE_MAGNETIC_FIELD, Sensor.TYPE_ACCELEROMETER, etc.) will make your life—and mine—easier. Alongside the main compass view, I need a reliable in-app calibration workflow so users can quickly correct sensor drift. Please handle the typical edge cases (device without a magnetometer, sensor interference warnings, permission prompts) gracefully and with clear messaging. To keep things future-proof, structure the ...

I am working on a compact RF application based on Silicon Labs’ SI4010 transmitter and now need a fresh set of expert eyes to get it production-ready. The hardware is already roughed-in and the core firmware skeleton is compiling, but performance still falls short of our targets in range, spectral cleanliness, and power efficiency. Your task spans three focused areas: • Schematic & PCB audit – flag layout, matching-network, or decoupling choices that could be detuning the front end. • Firmware tuning – refine register settings, timing, and wake-sleep sequencing in the SI4010 API so we hit our duty-cycle and current-draw goals without sacrificing link reliability. • Validation – document improvements with spectrum-analyzer plots, RSSI ver...

I’m building a suite of custom applications around the ESP32 and its BLE capabilities and need a skilled developer who can stay with me over the long haul on a part-time, as-needed basis. The work is a mix of firmware coding and light hardware design, so you should feel equally at home flashing code with ESP-IDF/Arduino C++ and laying out simple PCBs or reviewing schematics. Core task The boards will gather data from several sensors and peripheral modules, then broadcast or exchange that data over BLE with my mobile apps and back-end services. So far, the project roadmap includes: • Temperature sensors • Motion sensors • Humidity sensors • GPS, LoRa and RFID modules Your role – Extend and optimise the ESP32 BLE firmware to handle the data flow fro...

# Design two PCB Boards in EasyEDA for later JLCPCB manufacturing, including assembly. I am open to professional recommendations regarding peripheral components (sensors, power converters, connectors) and layout optimizations. However, the MCU selection for both boards is fixed as specified below. For Board 2, I prefer the CH32V003 but am open to other CH32 variants if there is a strong technical reason. ## Board 1: ESP32-H2 based BLE monitoring device prototype. - MCU: ESP32-H2-MINI-1-N4 (Internal 4MB Flash). - Sensors: LIS3DHTR (Accelerometer), GXHTC3 (Temp/Hum), MSM261DHT006 (I2S Mic Top Port). - Constraints: - Height: Max 5.0 mm (including components and PCB - Battery holder should be as low as reasonable like Keystone 3003). - Width: Max 25 mm. - Length: Any. - PCB ...

I need help on two fronts and would like to work with one freelancer who feels equally comfortable in both. First, I am developing a low-frequency (30–300 MHz) microstrip antenna. You will take my initial sketches and performance targets, model the antenna, iterate dimensions for optimal impedance match and gain, and provide fabrication-ready Gerber files plus a brief simulation report (HFSS, CST, or comparable). If you already have proven techniques for low-band microstrips, please outline them when you respond. Second, I have a backlog of structured data that must be transferred from scanned sheets into Excel/Google Sheets with 100 % accuracy. Clear, consistent formatting is essential; the dataset will later feed directly into my RF analysis scripts. Deliverables • Complete...

I am looking for an experienced developer, biomedical engineer, or development team capable of building an advanced medical diagnostic system. The concept is to create a portable handheld device that can analyze a small blood sample from a patient. The blood would be inserted into the machine through a cartridge or slot system, similar to how a phone charger plugs into a phone. Once the blood sample is inserted, the device should process the sample and send the results to a mobile or web application, where the user or doctor can view the analysis results and health indicators. The goal is to develop a system that can help identify diseases or health conditions based on blood analysis with very high accuracy and reliability. This project will start with a prototype, and if the developer...

Saya memerlukan rancangan lengkap untuk robot medis setinggi ±70 cm yang mampu: • Mendeteksi berbagai penyakit melalui panel deteksi dan pemindai tubuh • Melakukan hingga 40 kali tindakan operasi ringan • Mencetak laporan tertulis berisi hasil diagnosis langsung dari slot di bagian depan robot Lingkup pekerjaan meliputi: 1. Konsep mekanik dan elektronik—termasuk tata letak panel deteksi, modul pemindaian tubuh, serta lengan atau instrumen operasi. 2. Skema sensor dan algoritma deteksi penyakit (kanker, demam, dan kondisi umum lainnya). 3. Desain sistem pencetakan otomatis untuk laporan tertulis. 4. Integrasi perangkat lunak awal yang mengoordinasikan proses pemindaian, analisis, dan eksekusi operasi. 5. Diagram kontrol, daftar komponen, serta pan...

I already have a fully routed EasyEDA project built around an ESP32 running MicroPython. The first prototypes work, but the rest of the circuitry is over-engineered. I now want a fresh set of eyes to review and streamline every component except the ESP32 itself. The targets are clear: trim the bill of materials for lower cost, cut idle and peak current for better power efficiency, and, wherever possible, boost overall performance while reducing wiring complexity. That means analyzing every resistor, capacitor, connector, regulator, sensor and support IC on the board, justifying each part’s value, and proposing smarter substitutes or eliminations. After the review, I’ll need an updated schematic, a clean BOM, and a revised PCB layout ready for manufacturing export (Gerber, Pic...

I want a piece of wearable technology that creates a protective bubble just around my body, blocking or seriously attenuating incoming RF signals while also giving me the option to see what is trying to get through. In other words, it should both shield my own bio-signature from external probing and help me detect any active transmissions aimed at my immediate vicinity. The environment is highly personal—think a one-meter radius wherever I move—so the solution needs to travel with me rather than sit on a desk or in a wall. Comfort, size, and battery life therefore matter almost as much as raw shielding performance. What I imagine is a compact, self-contained module (belt clip, pendant, or similar form factor) that combines three core functions: 1. Real-time RF spectrum ...

I need an experienced computer engineer to review an existing hardware design and help me lift its overall performance. The current architecture works, but latency and throughput are not where they should be. I want fresh eyes on component selection, signal integrity, and any firmware tweaks that could unlock extra speed while keeping power consumption under control. You will start by analysing the schematics, BOM, and test data I provide. From there, I expect clear recommendations—whether that means re-routing critical traces, choosing faster interfaces, streamlining the memory hierarchy, or proposing other intelligent changes. Once we agree on the direction, you’ll deliver the updated design files (Altium or KiCad preferred), annotated schematics, and a concise report showin...

I need a seasoned embedded engineer to design and implement a lean Time-Division Multiplexing protocol that funnels several high-speed ADC channels into a single, reliable UART stream. The end goal is clear: squeeze the maximum possible throughput out of the link without sacrificing data integrity. The work revolves around three core competencies—TDM protocol development, raw ADC data handling, and low-level UART communication—so fluency in each of these areas is essential. Our front-end hardware already produces digitised samples via a bespoke analog-to-digital conversion stage; your task is to move those samples efficiently over UART, interleaving them with tight framing, minimal overhead, and built-in error checking. Key deliverables • Well-documented C/C++ (or equi...

Saya seorang inventor yang masih sering menemui jalan buntu ketika masuk ke ranah elektronika dan perangkat keras. Saya ingin meningkatkan keterampilan teknis saya secara nyata—bukan sekadar teori, tetapi pemahaman praktis yang dapat langsung saya terapkan pada prototipe dan proyek-proyek saya berikutnya. Yang saya butuhkan: • Sesi mentoring terstruktur (online atau hybrid) yang menjelaskan dasar hingga praktik lanjutan elektronika—mulai perancangan rangkaian, pemilihan komponen, hingga debugging. • Penjelasan mendalam mengenai penggunaan alat ukur (multimeter, oscilloscope) dan teknik soldering yang baik. • Studi kasus singkat berdasarkan proyek saya saat ini agar saya bisa belajar sambil menyelesaikan masalah nyata. • Tugas atau latihan mingguan de...

I need a motor interlock circuit designed in Codesys. The primary purpose of this circuit is as a safety mechanism, ensuring that two motors cannot operate simultaneously, thereby preventing potential hazards. Key Requirements: - The circuit should ensure safe operation through interlocking two motors. - Implement start/stop logic control. Ideal Skills: - Proficiency in Codesys programming - Experience with motor control circuits Design a ladder program to control two motors with interlock system using CODESYS. a) Ladder program showing detailed control units b) Visualization output window based on the designed control units need this as a codeysis project file i can open up in version 3.5 sp21 Timeline: 2 days

I’m building a custom handheld that plays original Game Boy Advance and Game Boy Color cartridges and I need the entire internal hardware engineered for it. I will be designing and manufacturing the outer shell myself, so your focus will be everything that sits inside the case: • A reliable GBA/GBC cartridge reader is the top priority; it must boot retail carts flawlessly. • Back-lit LCD (or IPS) screen driven at the correct refresh rate with minimal tearing. • Stereo speakers plus a small on-board amplifier and 3.5 mm headphone jack. • Rechargeable battery pack with USB-C charging and power-management circuitry (fuel gauge, protection, and safe-charge IC). • Responsive D-pad, A/B + L/R buttons, Start/Select, and volume control interface routed to a ...

We are seeking an experienced industrial controls engineer or automation contractor to support the control system design for modular hydrogen production and fueling systems. The scope includes developing the control architecture for systems incorporating electrolyzers, purification (PSA), compression, storage, and dispensing equipment. The contractor will be responsible for preparing control philosophies, functional design specifications, I/O lists, cause-and-effect matrices, and PLC/HMI logic required to safely and efficiently operate hydrogen systems in industrial environments. Experience with process controls, gas handling systems, and hazardous-area instrumentation is strongly preferred. The role will involve working alongside our engineering team to translate process and mechanical d...

PCB Design Brief Timeline Media Dock Controller Board This project requires a KiCad PCB design for the first prototype of a open source Media Dock. The dock is a hardware reader device used to interact with physical Media Volumes, which are media cartridges containing either storage media (SD card) or NFC identification tags. The board will be installed inside a dock enclosure and connected to a front display. Core Features The PCB must include support for the following components: Microcontroller ESP32 module (recommended) or equivalent microcontroller suitable for handling: SD card access NFC communication display control system logic NFC Reader The board must include an NFC reader chip (such as PN532 or equivalent) used to detect and read NFC tags embedded in Timeline medi...

This project is about building a physical “AI Secretary” system that combines a premium desk device with ultra‑simple wireless buttons people can stick anywhere to reach the same assistant. The goal is not just a gadget, but a coherent hardware family that makes interacting with my AI models feel tangible, fast, and effortless. At the center is the Desk Hub, a compact, high‑end box that lives on a desk like a small instrument. It has a small front display, a few physical buttons, a subtle light ring or LED bar, a microphone, and a speaker. Internally it runs on an ESP32‑class microcontroller with Wi‑Fi and Bluetooth. The Hub is always powered via USB‑C and always connected to my cloud backend, where all speech‑to‑text, language model processing, tools, and text‑to‑speech live. ...

I need an experienced FPGA programmer to assist with a data processing application. Key Requirements: - Proficiency in at least one of the following FPGAs: Xilinx, Altera, Lattice - Expertise in data processing applications - Familiarity with VHDL, Verilog, or SystemVerilog Ideal Skills and Experience: - Proven track record in FPGA programming - Strong background in data processing algorithms - Ability to work with various FPGAs and HDLs Please provide relevant experience in your bids. We need to develop ethernet hub in fiber optic 2 ports , and 16 SPI for chip led controller using data and clock . SPecia Ethernet protocol defined by us.

Looking for a distribution Protection and Control Engineer to design integration of a 50MW solar plant into an existing utility substation. The solar plant supplies the existing utility substation by two 10km 33kV overhead lines. Design to ensure the new generation does not compromise the stability or safety of the existing network (Considering that at 50MW, dealing with significant fault level contributions and bi-directional power flow). 1. Input to be provided by the utility and the client: 1.1) Drawings of the existing substation. 1.2) Protection Interface: confirmation of the utility specific protection functions requirements (e.g., Line Differential, Distance, or simple Directional Overcurrent). 1.3) Confirm which signals must be sent to the utility's Control Center vi...

We are developing a luxury smart ring wearable and are looking for an experienced hardware engineer to design a compact PCB/FPC for this device. This is a very small wearable device, so experience with ultra-compact electronics is essential. Device concept: Smart ring with biometric sensors and Bluetooth Low Energy connectivity. Main components planned: • Nordic nRF5340 BLE SoC • MAX86174 optical biometric sensor (PPG) • ICM-42670 motion sensor (IMU) • TMP119 temperature sensor • nPM1304 power management IC • External SPI Flash memory • Li-Po micro battery Design constraints: • Ring thickness target: 3–3.5 mm • PCB width: approx 5.5 mm • PCB length: approx 26–30 mm semicircle layout • Extremely low power consumption ...

1: Simple Arduino device detecting a switch from a device 2: 2 RBG light strips with 16 LEDS 3: 4 input outputs for on and off

I look for hardware developer. Electronics schema and pcb designer.

I am putting together a 120 V DC source for a high-current, high-power three-phase AC motor installation and need a rock-solid schematic that I can hand straight to my technicians for build-out. The design has to meet three key objectives in one compact drawing: deliver stable 120 V DC under heavy load, cope gracefully with the inrush and sustained current demanded by the motor, and integrate full protection against over-current, over-voltage, and thermal runaway. Because the application is industrial scale, I expect component choices rated to handle continuous high amperage, not just momentary peaks. Feel free to suggest whether a discrete rectifier stage, a switched-mode topology, or a hybrid arrangement makes most sense—so long as the final output stays clean and well-regulated...

Quiero que revises y mejores mi circuito basado en un Xiao ESP32-C3 que controla una tira EL de 1,65 m mediante un inversor 3,7 V DC → 100 V AC, un sensor táctil TTP223 y un MOSFET lógico (AO3400, IRLZ44N o SI2303). Lo que más necesito es la mejora del circuito existente, poniendo el foco en la optimización de la eficiencia energética. Aunque sé que el mayor consumo proviene de la propia tira EL, quiero exprimir al máximo la batería Li-ion de 1 600 mAh para alargar la autonomía más allá de las 4 h actuales sin sacrificar brillo. Tareas concretas • Proponer el esquema más compacto posible, manteniendo componentes SMD de fácil adquisición. • Seleccionar el MOSFET l&oacut...

I’m building a small arcade-style attraction made up of six identical stations. Each station will recognise when its hand-held controller is lifted by means of a magnetic sensor—or any other proper kind of sensor —then launch a three-minute countdown. Here is the user flow I need you to realise: 1. Controller is lifted → internal timer starts. 2. An OLED screen at that station immediately shows the remaining time, counting down in real time. 3. When the three minutes expire the screen simply replaces the countdown with a clear “Game Over, move to next zone ” message + a buzzer or light; 4. Once the controller is set back the system must reset itself, ready for the next player. Hardware thoughts so far: magnetic (reed or Hall) sensor to detect li...

I have a commercial IR-band Laser device with essentially two "Modes" - NORMAL and TRAINING, or restricted. Switching between the two can only be accomplished by accessing the Firmware via a proprietary 8-pin connection, for which I do not have a cable or interface. The candidate must either A) build a custom breakout to connect to the proprietary connector, or B) modify the OEM CONTROLLER pad and cable. Once the system is accessed, no custom coding, overwriting, or modification of the firmware will be required; the Candidiate need only identify the language, access the settings, and "flip the switch" between the two settings profiles. The hard part will be creating the connection. Something as simple as a POGO pin may be sufficient, but I am not qualified to say. T...

I'm in immediate need of an expert with PyroSim software experience who can provide a detailed fire simulation. Unfortunately, some considerations were missed initially, so it's critical that your knowledge is comprehensive. Job Requirements: - Experience with PyroSim - Understanding of fire behavior, specifically regarding the spread rate and heat transfer - Must also consider smoke movement and its influence on incidents - Strong analytical skills to interpret and make recommendations based on simulation results - Able to deliver the completed project ASAP Candidates with a background in Fire Engineering will be highly considered. This is an urgent project, so please only apply if you can start immediately.

I need an expert to set up Ignition SCADA and integrate it with one Allen-Bradley CompactLogix PLCs for monitoring an existing process. In addition we need a panel designed and integrated that will monitor compressed air and nitrogen. This will need to be SCADA integrated as part of implementation and visualization. We will need Allen Bradley / CompactLogix setup. Key Requirements: - Set up a new Ignition SCADA system - Integrate one existing CompactLogix PLCs/HMI panel/process - Design/Implement a new PLC/panel to monitor compressed air and nitrogen levels Ideal Skills: - Proficiency in Ignition SCADA - Experience with Allen-Bradley CompactLogix PLCs - Ability to design panels - Strong background in industrial automation and monitoring systems Please provide a detailed plan and timeli...

I am looking for an experienced mobile app designer/developer to help create the first prototype (MVP) of a mobile app Please let me know if you have experience designing sports performance or wearable technology apps, and if you can share examples of your previous work. Thanks

I need assistance connecting my Panasonic VCR/DVD combo to my HDMI-based TV. I already have an HDMI converter or adapter. Requirements: - Experience with A/V equipment - Familiarity with HDMI connections and converters - Problem-solving skills to ensure a proper setup Ideal Skills & Experience: - Background in electronics or A/V setup - Previous experience with VCR/DVD connections - Ability to work with various TV types (LED, LCD, Plasma)

I need a double-layer, signal-processing board laid out in Altium Designer and prepared for fabrication at JLCPCB. The finished board will fit inside a 15 cm × 15 cm envelope, so component placement, routing, and keep-outs should respect that medium-size constraint. Deliverables I expect: • Complete Altium project with schematics and PCB layout • Optimised Gerber, drill, and pick-and-place files matched to JLCPCB’s specs • BOM with manufacturer part numbers and assembly notes I will review the design by importing the files directly into Altium and running JLCPCB’s online DFM check; the job is complete once the files upload without errors and the board passes ERC/DRC.

I need a complete H∞-based control solution that lets my missile autopilot remain stable and reliable across a wide envelope of flight conditions and model uncertainties. The work starts from the nonlinear or linearised dynamics I will supply; from there, I expect you to derive or refine the state-space model, set up the weighted mixed-sensitivity formulation, and tune the H∞ controller so it meets industry-standard robustness and performance margins. Please implement and simulate everything in MATLAB/Simulink, documenting the exact toolbox functions and scripts you use so I can reproduce every step. When the design is closed, deliver: • Clean, well-commented MATLAB/Simulink files for the plant model, weighting functions, synthesis, and time-/frequency-domain analyses ...

I need the internal circuitry of the KK-82MS scientific calculator documented so I can design a drop-in replacement PCB. Your job is to open the unit, trace every relevant signal, and give me a clear map of what connects where. The focus is on both LCD behaviour and the button-scanning scheme, so I expect you to show how each LCD segment is driven, which pins act as commons, how the microcontroller multiplexes them, and the exact keyboard matrix rows and columns the processor polls. Feel free to combine a logic analyser, multimeter, oscilloscope, or any other bench tool you trust; choice of instrumentation is up to you as long as the final data are unambiguous. Deliverables • High-resolution photos of the calculator fully disassembled, including close-ups of the flex cables and IC m...

I have a stable FreeRTOS-based firmware that currently compiles only under my portable Arduino IDE 1.8.13 setup for the SAMD51 MCU. I now want the project to build and run cleanly in the latest Arduino IDE without carrying along any of those version-specific hacks, board package pin-tweaks, or legacy library work-arounds. Once the codebase is modernised, the next step is to extend it with new sensors. You will receive the present firmware, board-support files, and the partial sensor drivers at project start.

Hello, **We only consider the QC from China only** I have a consignment of electric Product - Mosquito Diffuser that will be ready to leave the factory in Chengdu, Sichuan, and I need an experienced quality inspector on-site before it ships out. The task is strictly a pre-shipment check focused on two areas: visual inspection of workmanship and packaging, and functionality testing of the finished units. You will visit the factory on the agreed date, work alongside the production team without disrupting their flow, and provide an independent report that lets me decide whether to release the balance payment to the supplier. Scope of work • Visual inspection – confirm cosmetic finish, labeling, accessories, and carton integrity meet the approved golden sample. • Functio...

I am looking for an experienced RF/antenna engineer to help optimise the performance of my dual-band antenna design integrated with a frequency selective surface (FSS). The antenna structure has already been designed and simulated. However, further optimisation is required to improve key performance parameters such as gain, bandwidth, return loss (S11), radiation characteristics, and polarisation performance at both operating frequencies. Scope of Work The selected expert will be expected to: 1. Analyse the existing dual-band antenna design 2. Optimize the Frequency Selective Surface (FSS) structure 3. Improve gain and bandwidth performance 4. Optimize S11 (return loss) and impedance matching 5. Achieve a broadside radiation pattern (0° direction) at both operating frequencies 6...

Looking for an Engineer with strong experience in industrial automation, control systems, and OT infrastructure. Freelancers should be proficient in following: ----->>> Configuration, maintenance and troubleshooting of HMI (C300, C300PM, UOC, HBM) ----->>> Support and troubleshooting of PLC systems and SCADA integration ----->>> Expertise in Control loop tuning and basic advanced control (PID) I am looking for experts from Pakistan only.

Hi, I'm looking for an experienced PCB designer to create a custom carrier/breakout PCB for a compact handheld device. No firmware or software needed — design only. Core Module: LILYGO TTGO T-Call V1.3 (ESP32 + SIM800L GSM) — mounted on the PCB via pin headers Components to integrate on PCB: OLED Display (SSD1306 128x64, I2C, 4-pin): Mounted above the PCB using standoff spacers — 4 mounting holes required Height will be adjusted with standoffs 4-wire cable from display soldered directly to PCB pads Buttons: 1x membrane switch connector (2-pin) for main button 2x additional button footprints connected to spare GPIO pins (for future use) Buzzer: Passive buzzer mounted directly on PCB Connected to designated GPIO via NPN transistor + flyback diode driver circuit ...

My Denon AVR drives a home theater system, and the moment the amplifier powers up the speakers erupt with a rolling, thunder-like rumble. The noise stops only when the unit is switched off. All speaker wires, RCA leads, HDMI runs, and power connections have been double-checked and seated firmly, so loose cabling does not appear to be the culprit. I’m looking for an experienced audio-electronics technician who can come on-site, trace the fault, and advise on the fix—whether that turns out to be a failing power-supply capacitor, a grounding issue, or something deeper on the amplifier’s main board. If parts need ordering, I’m happy to approve them once the underlying cause is confirmed. Please let me know: • Your house-call availability in the next week or ...

I need an engineer or team to create a working design for a parcel dimensioner that rivals the accuracy and reliability of a Cubiscan 325. The unit will live in a busy warehouse environment, so durability and quick “drop-and-scan” operation matter as much as precision. It doesn't have to be a similar design, but a similar function and success rate at measuring small irregular objects to the same size capability. Scope of measurement • Mixed-material parcels (paper, cardboard, plastic—anything that routinely moves through a fulfillment line) • Dimensions captured: length, width, height only—weight integration is not required at this stage Core expectations I’m looking for a complete, production-ready package: mechanical layout, electronic...

I need a wearable solution to block radio frequencies (RF). This should be a full-body suit to shield me completely. Requirements: - Design and create RF-blocking full-body suit - Comfortable and breathable for daily wear - Secure and adjustable fit - Lightweight materials preferred - Ideally, prior experience with RF-shielding materials and clothing design Ideal Skills and Experience: - Expertise in RF shielding - Knowledge of suitable materials - Experience in clothing design and manufacturing - Ability to create custom-fit solutions Please share relevant portfolios and experience.

Title: Mechanical & Electrical Engineers Needed for Bionic Arm Project (CAD + PCB Design) Description: I am developing a bionic prosthetic arm project and I’m looking for engineers to help with both the mechanical design and electronics/PCB design. Roles Needed: 1. Mechanical Engineer - Experience with CAD software (Fusion 360 preferred but not required) - Design and improve a 3D-printable prosthetic hand/arm - Work with servo-driven mechanisms for finger movement - Ensure parts are strong, lightweight, and easy to assemble - Help optimize the design for 3D printing 2. Electrical Engineer - Experience with PCB design (KiCad, Altium, EasyEDA, or similar) - Design a custom PCB to control and integrate: - 11 servo motors - 5 EMG muscle sensors - 2 oximeter sensors to m...

Who Should Apply Please apply only if you have direct experience in electrical symbol creation, library development, or related automation systems. This project requires more than general coding ability. Preference will be given to freelancers who can demonstrate a clear understanding of the requirement and prior implementation experience in this area. Project Overview I am looking for an experienced freelancer to develop an AI-assisted electrical schematic symbol automation tool with a strong focus on accuracy, structured symbol generation, editing flexibility, and multi-EDA export support. Core Concept The main concept of this project is as follows: A user will open a component datasheet from a website, PDF, browser, or any other source. The user should be able to capture the pin d...

I need a complete engineering package for a compact, stainless-steel (SS316) system that transfers two high-pressure gases—oxygen and a second gas—from 4 L, 1 800-2 000 psi supply cylinders into a 5 L storage tank. The small tank will serve purely for storage. Filling must occur in a defined sequence: first oxygen to a set intermediate pressure, then the second gas until the vessel reaches roughly 1 000 psi total. Gas purging is the preferred method for every line before and after each fill so that no pressure or cross-contamination remains prior to disconnecting the storage tank. The layout has to stay very tight—short runs only—and all wetted parts are to be SS316. Control and safety monitoring will be handled through a PLC with an HMI. Plan on integrating: &b...