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I need a compact laser-based perimeter protection system for a commercial site that immediately calls a predefined phone number whenever the beam is interrupted. The solution must combine reliable laser detection hardware with a GSM module (SIM800, SIM900 or similar) and the embedded code to place that outbound call within seconds of a breach. The finished unit should be self-contained, run from standard low-voltage DC, and include clear wiring diagrams and firmware source so I can duplicate or service it later. If you can integrate basic tamper detection, weather-proof housings, or an optional battery backup, mention that in your proposal—those extras would be a plus but are not mandatory. To accept the work I will power up the prototype on-site, break the beam and confirm that my...

Embedded SNMPv3 Developer Required – STM32H723 + lwIP I am looking for an experienced embedded developer who has previously implemented SNMPv3 on STM32 or similar microcontrollers using lwIP. I already have basic SNMPv1 GET and TRAP functionality working on an STM32H723-based board. The middleware, BSP, FreeRTOS tasks, and UDP stack are already in place. The task is to extend the existing SNMP agent to support secure SNMPv3 communication. Project Requirements Phase 1: SNMPv3 Communication Implement SNMPv3 GET and TRAP functionality. Enable SHA authentication and AES-128 privacy/encryption using USM. Respond to authenticated and encrypted GET requests. Support GETNEXT, if feasible. Send authenticated and encrypted traps to Bitcom NMS. Ensure a valid, unique SNMP engine ID for the d...

I need an experienced PCB designer to take an existing board and re-engineer it so it can do more without complicating assembly. My main goal is increased functionality, but I still want the layout to rely on through-hole components because that matches our current production line and simplifies repair work later. The board will live in a strictly indoor setting, so ruggedization for weather is not a concern. You will start from my current schematic and Gerber set (I’ll share them once we agree to proceed) and add the new features we discuss while keeping trace integrity, clearance rules, and component spacing in check. Please feel free to suggest additional input/output ports, wireless modules, or smarter power-management sections if you see clear opportunities; I’m open to i...

We are looking for an experienced PCB designer to help with PCB schematic design, PCB layout, component selection, routing, and preparation of manufacturing-ready files.

I am looking for an experienced electronics/IoT developer to build a **working prototype of a 4G SIM-based security camera and a simple mobile app**. The camera should work without Wi-Fi and connect to the internet using a SIM/4G network. ### Prototype Requirements * Camera with live video * 4G/SIM connectivity * Microphone + speaker for two-way communication * Battery powered * USB-C/external power or power bank support * Remote viewing from a mobile app * Basic camera controls * Simple backend/cloud connection * Prototype should support the concept of having multiple cameras at one location For the first stage, I am **not looking for a production-ready/custom-manufactured camera**. Commercially available development boards/modules can be used. The goal is to build **one complete wor...

I need a complete set of KiCad schematics drawn from scratch for a fairly large, multi-board concept. The job is limited to the schematic stage—no PCB layout—yet the design is dense, with a high component count, multiple power rails, and several digital-analog interfaces that must be kept well organised through hierarchical sheets. I will supply a first batch of parts: CPUs, power converters, key connectors and a few specialised ICs, each with its electrical characteristics and a preferred footprint. The remaining devices—discrete passives, protection components, odds-and-ends ICs—still need library symbols created or matched to existing KiCad libraries, along with suitable footprints. Whenever information is missing, I will point you to the relevant datasheets; yo...

I’m building a compact entertainment gadget dedicated to high-quality audio playback and I need a complete PCB designed from scratch. The board must meet all the usual consumer-electronics constraints—low noise, minimal power draw, reliable mass-production tolerances—and fit inside a small enclosure that I will share once we start. Here’s what I expect from you: • Schematic capture based on my block diagram and component preferences • Optimised multilayer board layout with proper ground-plane management for clean audio paths • Gerber, drill and pick-and-place files ready for fabrication • A clearly organised BOM with current, purchasable parts and viable alternates • Brief design notes explaining critical decisions (impedance contro...

I already have basic SNMP v1 “get” and “trap” working on an STM32H723-based board, but now the device must speak full SNMP v3 with security enabled. On the application layer I need you to add: • Authentication: SHA (usmHMACSHAAuthProtocol) • Privacy/Encryption: AES-128 (usmAesCfb128PrivProtocol) • Message handling: both Trap and Get operations exactly as they work today in v1, only now wrapped in v3 security headers The middleware, BSP, FreeRTOS tasks and UDP stack are in place; your task is to extend the existing agent code (currently using lwIP’s raw API) so that the MCU can: 1. Build and send authenticated, encrypted traps to our NMS. 2. Respond to encrypted, authenticated Get (and ideally GetNext) requests. 3. Expose a simpl...

hello, as part of our development process, we are experimenting with pcb design by Ai in kicad (mainly kimi k3 and konnect mcp). We can test ideas quickly but then design are less than optimal (to say the least) So, we would like to hire a person that is willing to review and fix the project to make it really fabrication ready. We would like to hire by the hour as we cannot know upfront what the effort is going to be for any given pcb, sometimes the project is not bad, sometimes it's terrible. So, if you are not familiar with freelancer. Com desktop app to track the hours, Pleaee do not bid. This is an ongoing project as we have several projects like this. Pleaee mention your experience and portfolio should back it up.

Custom Motherboard with Microchip 48‑pin MCU – 2x 3‑Digit & 1x 7‑Digit Seven‑Segment Displays, Oxygen Sensor, 3x 12V Solenoid Valves, Flowmeter, 2x 5‑Key Touch Keypad, 2x I2C LCDs,2x Water Level Sensor, Thermal Printer, 12V Relay for Motor, air pressure sensor Project Overview I need a custom motherboard (schematic, PCB layout, and firmware) based on a Microchip 48‑pin SMD MCU (TQFP‑48). The board must interface with: . 1x air pressure sensor · 2x 3‑digit seven‑segment displays for Qty · 1x 7‑digit seven‑segment display for amt · Oxygen sensor · 3x 12V solenoid valves – controlled via on‑board MOSFETs · 1x flowmeter – pulse output, interrupt input · 2x 5‑key touch keypad · 2x I2C LCD displays (16×2) · 2x...

I'm seeking an experienced developer to create the FaultLine Meter-Link, a compact industrial electrical measurement accessory. The device will act as a BLE measurement bridge between an existing multimeter and its standard 4 mm safety banana test leads. Key Requirements: - Handle real-time monitoring of voltage, current, and resistance. - Development of a companion app for iOS, Android, or Windows (platform to be confirmed). Ideal Skills and Experience: - Expertise in BLE technology and industrial measurement tools. - Proficiency in cross-platform app development. - Strong background in real-time data processing and display. Prior experience with industrial measurement devices and real-time monitoring applications is highly desirable. Please provide a portfolio showcasing relevant...

I have a hand-drawn circuit diagram that now needs the full KiCad treatment: a clean, conventional schematic, properly assigned footprints, a 3D board render, and final Gerber files ready for fabrication. The project is for my own personal use, so I’m happy to discuss component selection rather than lock you into any specific brands. Your background with KiCad should be evident in your reply—show me similar conversions or other boards you have taken from paper (or napkin!) through to production. Deliverables • KiCad schematic matching my sketch • Neatly laid-out PCB with footprints and design rules observed • 3D board view exported as STEP or screenshots • Verified Gerber set (RS-274X) and drill files I’ll supply the scanned sketch and...

I have an STM32F407VET board that will drive a completely stand-alone single-axis solar tracker. The controller must perform three key jobs: • Automatic sun tracking – use only a gyroscope/accelerometer (no light or temperature sensors) to predict the sun vector and move two actuators so the panel stays aligned all day. • Manual control override – via push buttons or simple UART commands I can pause the algorithm and jog each axis, then resume tracking instantly. • Data logging and monitoring – record attitude, motor commands, and health metrics to a micro-SD card while simultaneously streaming the same data over UART for live viewing. I expect clean, non-blocking C firmware that compiles in STM32CubeIDE for the F407VET. HAL drivers are fine; FreeRTOS...

I'm seeking an experienced IoT developer who can create a hardware device with a digital display. The device should operate offline, providing straight output based on programmed inputs. Key Requirements: - Hardware: - Digital display output - Programmed to do calculation. - App: - Display input data and calculations from the hardware - User-friendly interface Ideal Skills: - Experience in IoT hardware development - Proficiency in app development - Strong programming skills - Ability to create offline operating systems Please provide examples of previous work and a brief outline of your approach.

HARITRON – B2B Business Development / Lead Generation HARITRON is an engineering services company specializing in Embedded Systems, Firmware Development, Electronics Engineering, PCB/Hardware Development, IoT and Product Development. We are looking for an experienced B2B Business Development professional — NOT a digital marketer — who can identify potential clients, reach decision-makers and generate genuine business opportunities. Target industries: • Embedded & electronics companies • IoT & hardware startups • Industrial automation • Medical devices • EV & automotive • Robotics • Semiconductor/electronics • Industrial product companies Target decision-makers: Founder, CTO, VP Engineering, Head of R&D, Engineeri...

I’m putting together a small-run prototype board focused on digital signal processing that also needs onboard wireless connectivity. The goal right now is to capture a clean, production-ready schematic that I can pass straight into layout once the parts are locked in. Here’s what you’ll be working with: • 100 % digital component set—no analog front ends this time. • Core functions revolve around real-time signal manipulation plus low-power wireless links (think BLE, Wi-Fi or similar; I’m open to whichever stack fits best). • It’s strictly a development board, so easy probing, test headers and clear silkscreen labels are important. What I need from you: 1. Complete schematic in KiCad, Altium, Eagle or another well-known CAD tool. 2....

Un workspace de crates Rust sin lógica de negocio — entrega eventos ("tecla pulsada en el puerto 2", "tarjeta leída", "orden BLE recibida") y operaciones ("abre el relé 1", "responde por BLE") — que un binario de aplicación enlazará después: Esqueleto de ejecución: binario estático, tokio, fichero de configuración único, logs a journald, integración con systemd (sd_notify, watchdog), usuario sin privilegios. Capa de abstracción de placa con perfiles declarativos para Radxa ROCK Pi S0 (Rockchip RK3308, Armbian) y Raspberry Pi Zero 2 W (Raspbian), y guía para incorporar placas futuras. Identidad estable del equipo. Driver UART de nuestra pl...

I need a concise Arduino Uno sketch that drives my Nema 34 stepper through its existing driver in a continuous loop with the following timing: • From home, turn 60° clockwise and hold that position for one second. • Return to the home position and pause one second. • Turn 60° anticlockwise, pause one second, then repeat the entire sequence indefinitely. Please base the calculations on a typical 200-step Nema 34 (1.8° per step) unless I can later change a constant for different micro-stepping settings. No sensors or limit switches are required; it is pure open-loop control. Alongside the .ino file, include a clear wiring diagram that shows the connections between the Arduino Uno, my stepper driver, power supply, and any needed resistors or opto-isolators so...

Procuro apoio especializado em tecnologia robótica para criar um robô de serviço focado em interação com usuários. A meta é desenvolver um protótipo capaz de: • Reconhecer presença e comandos de voz ou toque. • Exibir respostas por áudio, texto ou gestos simples, mantendo conversas naturais em português. • Integrar-se com APIs externas (por exemplo, agendas, sistemas de chamada ou FAQ) para oferecer assistência contextualizada. Precisarei de orientação sobre hardware indicado (sensores, atuadores, placa-controladora) e do software que viabilize controle de movimento, processamento de linguagem natural e interface de usuário. Caso já tenha frameworks ou bibliot...

TITLE: PCB testing and firmware development for acoustic transducer ---------------------------------------------------------------------------------------------------------------- THIS PROJECT HAS TWO PARTS *. Existing PCB Verification, Testing & Validation *. Developing firmware (for STM32) for the burst generation & echo processing Existing PCB Verification, Testing & Validation -------------------------------------------------------------------------- There is a PCB which is already designed & developed, to drive the "underwater ultrasonic transducer". We have the PCB. This PCB needs verification, testing, and validation in all aspects, such as voltage, current, any defects, leaks etc.. The goal is to confirm the manufactured board meets its design specifica...

I already built the user interface in SquareLine Studio for an Elecrow 7" CrowPanel (ESP32-S3). The layout consists of four full-screen background images with four transparent touch buttons placed on top. Pressing a button should simply toggle a corresponding light by driving one of the three external relays wired to the CrowPanel’s GPIOs; touching it again turns the same light back off. What I still need is the firmware that ties everything together: • Import the SquareLine-generated LVGL project, read the touch events, and link each of the four on-screen buttons to its relay output. • Drive the relays through ESP32 GPIOs with proper debouncing and visual feedback on the button (e.g. highlighted state while the light is ON). • Provide a clean PlatformIO o...

I’m looking to turn our scattered know-how—hundreds of PDFs, policies, detailed reports, emails, meeting minutes, and assorted documentation—into a single Retrieval-Augmented Generation assistant that answers questions instantly and finds the exact source passage behind every reply. What I already have in mind • Ingestion pipeline that automatically pulls new or updated PDFs, email archives, and other internal files, cleans the text, and embeds it in a vector store (FAISS, Pinecone, or a similar tool). • A lightweight search layer so staff can type a query and receive both a concise answer and the ranked source documents. • Chat-style interface (web or Slack/Teams bot) backed by an LLM with citations, guardrails, and role-based access. • Modular...

I already have a custom carrier board laid out, but the power section needs a quick revision—the existing regulator must be swapped for a different power regulator before we move to assembly. The current design is finalized, but one power IC is out of stock and needs to be replaced with an available alternative. I’ll provide the current schematic, layout files (Altium/KiCad), and the BOM; your task is to integrate the new regulator, verify all power-integrity considerations, update the PCB documents, and get the board ready for manufacturing again. Once the hardware files are final, I’ll need help bringing the board up in software. Specifically, I’m looking for boot-ready firmware plus the low-level drivers required for the OS I’ll be installing in-house. The...

我想用 Factory I/O 和 博徒软件做一次基础级别的 PLC 仿真示例。目标很明确：帮我搭建一个能运行的场景，并交付对应的 PLC 程序和仿真模型。最终文件只需覆盖核心逻辑和画面，不用做到完整生产线；后续如果表现理想，我们可以再扩展到设备控制、生产线模拟或故障诊断等进阶功能。 交付要点 • 使用 Factory I/O 与 博徒软件双平台协同 • 提供完整的可编译 PLC 程序（含注释） • 提供与程序匹配的 3D 场景 / 模型文件 • 简单说明文档，说明如何加载与运行 我已经选定“基础”详细程度，因此请把重点放在实现最小可运行版本：基本信号交互、关键设备动作即可。期待与你讨论实现思路与时间表。

R7FS5D37A3A01CFP See my side hardware ready Actually my project . Collect data from plc and push into cloud server The plc have rs232 port some plc ds485 port Protocol may be modbus or some plc own . We give all format and structure Total 10 type of plc See . The collected data from plc push i into 4 sec interval to 3 location Ip address At the same time 1. TCP Ip format 2 location 104 format Maximum tags 100 from plc From that 100 tags 15 tags only we push 104 format See the main key point on ur code the ec200 module always connect with network more details will be shared with potential freelancer

R7FS5D37A3A01CFP See my side hardware ready Actually my project . Collect data from plc and push into cloud server The plc have rs232 port some plc ds485 port Protocol may be modbus or some plc own . We give all format and structure Total 10 type of plc See . The collected data from plc push i into 4 sec interval to 3 location Ip address At the same time 1. TCP Ip format 2 location 104 format Maximum tags 100 from plc From that 100 tags 15 tags only we push 104 format See the main key point on ur code the ec200 module always connect with network more details will be shared with potential freelancer

I need a compact controller board built around the STM32F103CBT6 in the 48-pin LQFP package (or a pin-compatible alternative with the same Cortex-M3 core). The board must expose three independent serial channels: • RS-485 • RS-232 • A UART linked to an on-board serial-to-TCP module that speaks plain TCP/IP Reliability is critical. Please integrate proven over-voltage, short-circuit and over-current protection on all power inputs as well as the three interface blocks. If you are more comfortable substituting a different F1-series part with identical footprints, that’s fine as long as the firmware and pinout remain drop-in compatible. Deliverables • Complete schematic (Altium, KiCad or EasyEDA) • Four/two -layer PCB layout with proper isolation be...

Project Overview: Design and prototype a 446 MHz wireless audio broadcast system for indoor mosque sound in India (using the license-free PMR446 band). 1. Mosque Transmitter Unit: - Audio line-in from Mosque PA amplifier (Ahuja). - MAX9814 AGC leveler/compressor to prevent voice clipping or distortion. - Auto-VOX sound trigger to start transmitting automatically when the Muazzin speaks (zero manual buttons). - SA818S-U UHF module (1W Tx mode) tuned to 446.0562 MHz with 67.0 Hz CTCSS tone. - 50-ohm SMA connector connecting to outdoor Diamond X-50 minaret antenna via 15m RG-213 cable. - 5V DC power supply with surge protection. 2. Home Receiver Speaker Box: - SA818S-U module (Rx mode) tuned to the same 446.0562 MHz + 67.0 Hz CTCSS code. - Hardware squelch/mute control: MUST be 100% dead si...

I’m building a high-speed communication interface on an STM32-based board and need production-ready firmware written in C/C++. The microcontroller is an ARM Cortex-M series device, and the single most important goal is to move packets through the interface as quickly and reliably as possible—latency can be modest as long as overall data throughput remains very high. You will design and code the full communication stack, configure the peripheral clocks, DMA, interrupts, and buffering strategy, then expose a clean API that my application layer can call from RTOS or bare-metal. Low-level register work is fine, but you’re equally welcome to leverage STM32 HAL/LL or CubeMX if that accelerates development; the final code must compile under STM32CubeIDE or GCC-based Makefiles...

We are looking for a skilled and reliable KiCad developer/user for a potential long-term partnership. At the beginning, you will work in a trial/test period. We will give you a small KiCad task to evaluate your skills, work quality, communication, and reliability. Trial task: Use our Rounder for Tracks v3.2 KiCad plugin. Test it on a PCB with angled tracks. Check whether the tracks are rounded correctly. Try different plugin settings. Send screenshots after testing. Provide clear feedback about the results and any issues you find. If we are satisfied with your work, we will hire you for a long-term partnership and provide you with more KiCad-related tasks and projects on an ongoing basis. We are looking for someone who is interested in long-term cooperation, not just a one-time projec...

We are building a fuel tanker trailer monitoring system (pilot project) for petrol-PMS/diesel (AGO) distribution clients in our region. We have a detailed technical blueprint and now need: 1. Organizations/suppliers who can provide industry‑rated, ATEX‑compliant hardware (fuel level probes, smart GPS locks, telematics gateways, etc.) at prototype‑friendly pricing, ideally with OEM/white‑label options. 2. Embedded/firmware engineers and backend/API developers to integrate this hardware with our web/mobile platform via Modbus RS485, MQTT, and REST APIs. Note: This is a pilot project phase with ability to scale the concept to a wider client base after the tests. What We Already Have Complete system architecture and hardware list but need to know if we can get manufacturers with industry rat...

I need a complete IoT gateway hub that brings LTE (4G), Wi-Fi, Bluetooth, Zigbee and sub-GHz RF into a single, reliable unit for remote monitoring and alerting of smart-home devices. The goal is straightforward: gather data from a variety of in-home sensors and actuators, push it to the cloud over cellular when Wi-Fi is unavailable, and relay actionable alerts back to the user in real time. Here is what I expect: • Hardware design that accommodates the five radios with proper coexistence planning, power management and antenna layout. • Embedded firmware that can automatically select the best back-haul (LTE or Wi-Fi), maintain secure connections and expose a clean API or MQTT/HTTP interface for the smart-home layer. Also with bluetooth, zigbee and rf. • Delive...

PROJECT TITLE: WEAR IT V1 – Compact Wearable PCB & Schematic Design PROJECT OVERVIEW: We are developing WEAR IT, a compact screen-free wearable health and fitness band. The functional proof-of-concept (POC) is already working. We now need an experienced PCB and electronics engineer to convert the existing engineering architecture into a professional, manufacturing-ready custom PCB. This is NOT a concept-stage project. The electronics architecture and major components have already been selected. The engineer's responsibility is to create the professional schematic, PCB layout, routing, libraries, verification and complete manufacturing documentation. MECHANICAL TARGET: Maximum PCB size: 33.5 mm × 23.0 mm Maximum complete wearable device envelope: 34.7 mm × 24...

We are a medical device manufacturer developing the next-generation electronic control box for an existing product. We have received a Statement of Work from an Indian engineering services firm covering PCBA design, firmware development and Engineering Verification Testing, and we want an independent expert opinion on it before we sign. This is a review engagement only — no design work. The device (in summary): mains-connected Class II active medical device. Single integrated 6-layer PCBA with a universal-input mains stage using a certified medical AC/DC module, four isolated AC relay channels, dual isolated 4-wire PT1000 sensing, coolant flow and CT current monitoring, an STM32H7-class MCU with external SDRAM, a 5–7" IPS capacitive touch display running LVGL, an LTE Cat...

I’m looking for an embedded-systems engineer who can take ArduPilot’s AP_Periph codebase and turn it into a robust CAN-bus battery monitor. The unit will sit on a DroneCAN network and stream full MAVLink telemetry, so it can slot straight into my existing ground-station setup without any extra protocol bridges. Integration with other telemetry options such as or SmartPort isn’t needed right now. Key functions I must see on the bus: • High-accuracy individual cell voltage for every cell in the pack (not just pack voltage) • Hall-effect current sensing that stays linear and low-loss all the way to 400 A • Standard AP_Periph health, identification and parameter handling so the flight controller recognises the device instantly Deliverables 1. Schemat...

Our sports venue runs on an ageing electronic scoreboard built around seven-segment LED and P10 LED panels. It still works, but erratically, and it can only be operated from the hard-wired control box bolted under the grandstand. I need the whole system modernised so I can walk onto the field with a phone or tablet and run the show from there. Scope of work • Inspect every board, power rail and driver on the existing hardware, replace any damaged or obsolete parts, and leave the display fully refurbished. • Design and build a new controller unit that adds rock-solid wireless connectivity plus a battery-backup circuit so a brief power loss never blanks the screen. • Write clean firmware for that controller, making sure it can address both the seven-segment digits and t...

I need production-ready firmware for a Renesas MCU that will exchange data through a Quectel EC200 cellular module using both IEC 60870-5-104 and plain TCP/IP protocols. The code must handle complete data transmission, reception, and on-board processing so the MCU can act as an intelligent field unit that talks reliably to a SCADA master as well as to standard IP services. Scope • Build or integrate a lightweight IEC104 stack alongside a TCP socket layer that can coexist without blocking. • Manage all EC200 interactions (AT commands, connection setup, keep-alive, error recovery) over UART/SPI as appropriate. • Implement configurable buffers, parsing, and frame validation so that raw sensor payloads can be wrapped/unwrapped for each protocol. • Provide hooks whe...

I already have the full mechanical side of a new, cost-effective outdoor vending machine—frame, actuators, motors, sensors, the lot. What’s missing is the electronic heart: a sleek touchscreen interface, a reliable controller, and rock-solid QR-code payment processing. Here’s what I need built and integrated: • A capacitive touchscreen (preferred size 7-10 in) that looks premium outdoors, survives glare and light rain, and gives a smooth, intuitive flow from product selection to checkout. • A central controller (Raspberry Pi, STM32, or a similarly capable board—open to your recommendation) that drives the existing motors and sensors, handles temperature monitoring, door locks, and any future add-ons. • QR-code payment only: the screen should dis...

Experienced KiCad Hardware Engineer – Schematic Capture, DFM-Optimized PCB Layout & Production Package (Turnkey JLCPCB Assembly) Job Description: Honeycomb LLP is seeking an experienced embedded hardware and PCB design engineer to take a product design from initial block diagram/specifications through complete schematic capture, PCB layout, and turnkey assembly package delivery. The board will host an embedded microcontroller ecosystem (e.g., ESP32 / RP2040 / STM32) interfacing with sensors and power management circuits. The final design must be fully optimized for cost-effective manufacturing and assembly via JLCPCB SMT services. Scope of Work & Responsibilities: 1) Schematic Capture: Design modular, production-ready schematics in KiCad (latest stable version) adhering...

Hi, We are seeking to acquire a substantial, production-grade automotive software codebase with legally transferable usage rights for further development. Our focus areas include: • ECU / Firmware development • AUTOSAR • CAN / CAN-FD communication • UDS diagnostics • ADAS (Advanced Driver Assistance Systems) • EV/BMS (Electric Vehicle/ Battery Management Systems) • Embedded Linux or RTOS Technology Stack: We are flexible regarding the technology stack, but prefer C/C++, Python, COBOL, AUTOSAR, embedded Linux, or other widely used automotive industry standards. Key Requirements: 1. Real, functional production-grade source code (not demos or prototypes). 2. High-quality code with clear structure and documentation. 3. Legally transferable licensing and u...

TI-84 PLUS + ESP32-S3 + OV5640 AI CALCULATOR BUILDER SPECIFICATION 1. PROJECT OVERVIEW Build a modified TI-84 Plus non-CE calculator with an internally installed Seeed Studio XIAO ESP32-S3 Sense, OV5640 5MP autofocus camera, Wi-Fi, OpenAI API connectivity, TI-84 to ESP32 communication, and a calculator-side AI interface. System architecture: OV5640 camera -> ESP32-S3 -> Wi-Fi -> OpenAI API -> ESP32-S3 -> TI-84 -> Display The ESP32-S3 handles camera control, image processing, networking, and AI communication. The TI-84 provides the keyboard, display, user interface, and commands. Use the existing TI84-AI GitHub project by ivan-grebe as the primary software and architecture reference: Do not simply adapt an ESP32-C3 tutorial. This build specifically uses an ESP32-...

I have a TI-OS graphing calculator on my desk, a bag of parts, and a YouTube tutorial that supposedly turns the device into a pocket-sized ChatGPT terminal. What I need now is an experienced hardware-meets-firmware problem-solver who can transform that theory into a working build. Here is what you will be working with • Device: Graphing calculator running TI-OS • Goal: Load and run ChatGPT locally (or via whatever clever connectivity you propose) • Desired integration level: “Camera” – I chose this because I want to push the project further than simple text replies; ideally the camera add-on will feed images straight to ChatGPT for on-device analysis. If you see a smarter route, feel free to outline it, but the camera element must remain central. Scop...

Technical Specification: Inkjet DC Servo Motor Emulation via NEMA Stepper Motor (Closed-Loop Conversion)1. Project ObjectiveTo design and implement an electronic intermediary system (signal translator) to replace the original DC carriage motor of an inkjet printer with a NEMA stepper motor. The system must guarantee ultra-smooth, resonance-free linear motion and high-fidelity real-time positioning feedback to prevent the printer's mainboard from triggering a Carriage Jam or Fatal Error state.2. Block Diagram and Signal Flow ┌──────────────────────────────────────────────────────────┐ │ INKJET PRINTER MAINBOARD │ └───────────────┬──────────────────────────▲───────────────┘ │ │ [Integrated H-Bri...

Need small anf compact HDI multilayer pcb from systematic to pcba which can be connected with my existing smartphone pcb . Requirement in custom pcb are - 1) NFC + custom NFC antena 2) Secure element 3) secure MCU 4) type C USB for data 5) vibrator 6) touch buttons 7) pogo pins for charging BOM and all details of my main pcb will be discussed and provided to you

I already have a complete schematic and BOM for an embedded-system board and now need someone to turn it into a production-ready PCB in KiCad. You will receive the schematic, component list, and the exact board outline with mounting-hole locations so the size constraint is fixed from the start. Your task is to place all parts logically for signal integrity and serviceability, route power and ground planes cleanly, add connectors exactly where the enclosure dictates, and run full DRC to be certain the board will pass fabrication checks the first time. Please keep an eye on trace widths, clearances, and manufacturability rules that mainstream fabs expect. When finished, send me: • The complete KiCad project (schematic symbols, footprints, and PCB layout) • Gerber and drill fil...

I’m putting together a small robot that can be driven from a smartphone app so students can see core robotics concepts—actuators, basic kinematics, simple autonomy—in action. The emphasis is on clear demonstration rather than complex research, so I want a clean, reliable build that reacts instantly to on-screen controls. You’ll help me from design through to a working prototype. I’m open on the exact board and language (Arduino-Bluetooth, Raspberry Pi-Wi-Fi, ESP32, etc. all fine) as long as the final unit pairs quickly with an Android or iOS app and lets learners steer, change speed, and trigger at least one additional function (for example, a gripper or light). Because the real goal is teaching principles, I also need the code commented clearly and a short ...

I need a complete electronics solution that can replace the original EBB board on an Axidraw-style writing machine. The job covers both hardware and software. Hardware scope • Design a compact, two-axis motor-control PCB built around an ESP32. • Integrate two stepper-motor drivers capable of smooth, quiet motion at plotting speeds. • Provide a reliable USB interface for host control and firmware updates. • Include all required power-management, end-stop, and pen-lifter circuitry so the board can drop straight into an existing Axidraw frame. • Deliver production-ready assets: schematic (PDF & source), PCB layout, Gerber/Drill files, BOM with part numbers, and a brief assembly guide. Firmware scope • Develop firmware that exposes Axidraw-compat...

Çiftliğimdeki basınçlı yıkama sistemini tam otomatik hâle getirmek istiyorum. Donanımım STM32 tabanlı olacak; ön panelde bir TFT ekran ve sayısal tuş takımı bulunacak. Benden beklenen, hem bütün yıkama senaryolarını çalıştıracak sağlam bir gömülü yazılımın hem de gerekli şema ve dokümantasyonun eksiksiz teslimidir. Gereksinimler • STM32 mikrodenetleyici üzerinde C veya C++ ile yazılmış, CubeIDE-ye uyumlu kaynak kodu • TFT ekranda kolay anlaşılır menüler, geri bildirimler ve hata uyarıları • Tuş takımı ile program seçimi, başlat-durdur ve parametre ayarı • Pompa, vana ve sensör I/O’ları için non-blocking kontrol yapısı • EEPROM / Flash üzerinde parametr...

ESP32 Sonar Data Streaming to Android Phone – 300–400m Direct Wi-Fi Link, No Repeater I am looking for an experienced embedded/RF developer to build a reliable wireless communication system for a fishing boat sonar. CURRENT SETUP On the boat: - Sonar - Existing sonar driver - ESP32 On shore: - Android phone WHAT I NEED I want the following architecture: DRIVER → ESP32 → Wi-Fi AP + external antenna → 300–400m → Android phone → APK The Android phone must connect DIRECTLY to the boat. STRICT REQUIREMENTS - 350–450 meters real-world range - Direct boat → phone connection - NO repeater - NO router/access point on shore - NO additional radio receiver on shore - NO internet connection required - Android phone must receive the data di...

I'm seeking a skilled PCB designer to create a board for mass production that integrates an ESP32 C3 Supermini with an HLK-LD2410C for sensor integration, specifically a presence sensor. Key Requirements: - Design must facilitate sensor integration - Components: ESP32 C3 Supermini and HLK-LD2410C - Must be suitable for mass production Ideal Skills and Experience: - Proficiency in PCB design software - Experience with ESP32 and sensor integration - Background in designing PCBs for mass production