Design de Circuito Jobs

We are looking for an experienced hardware/PCB design engineer to create a customized board based on the Rockchip RV1126 processor, similar to the attached reference image. Project Requirements: • Must deliver the final source files natively in KiCad format. • Preference will be given to freelancers who already have a proven, working, or open-source RV1126 schematic/layout baseline to speed up development. • The task involves taking a base design and making specific hardware modifications (peripheral changes, connector modifications like J1-J5 interfaces, and form-factor adjustments). Application Criteria: In your proposal, please provide: 1. Proof of previous experience with high-speed PCB layouts or Rockchip processors (RV1126, RV1109, etc.). 2. A screenshot or confirmatio...

I have an echo-sounding instrument whose current PCB shows unreliable behaviour in the field. I need a skilled hardware engineer to review the existing schematic, pinpoint the root causes of the faults, and create a revised board that is production-ready. You will receive: • The original KiCad project (schematic, PCB, libraries) • Test logs and scope captures highlighting the failures • Electrical and mechanical constraints for the housing What I expect back: • A concise design-review report explaining each issue you find . A power indicator LED. • Updated schematic, PCB layout, and clean net-checking with all errors resolved • New BOM with readily available parts and suggested alternates • Fabrication files (Gerber/ODB++, drill, pick-and-p...

I'm looking for an experienced PCB designer to turn a provided schematic into a PCB layout. The design must prioritize optimizing signal integrity and is intended for an industrial environment. I will require all the files necessary for pcb assembly (Gerber, BOM, etc,.) Key Requirements: - Use of surface-mount components (SMD) - Industrial-grade robustness and reliability - Experience in designing PCBs with a focus on signal integrity Ideal Skills and Experience: - Proficiency in PCB design software (e.g., Altium, KiCAD) - Strong understanding of signal integrity principles - Experience with SMD layout and industrial applications

​PROJECT DESCRIPTION: We are looking for an experienced PCB hardware designer to develop a production-ready schematic and 2-layer PCB layout for a custom battery-powered LoRa node. TOTAL PROJECT DEADLINE: 5 to 7 days from project kickoff. ​CIRCUIT ARCHITECTURE & KEY COMPONENTS: ​ / RF: Ai-Thinker RA-09H LoRa module. 2 .​Power Supply: ​ * HT7333A low-quiescent LDO (3.3V rail to the RA-09H). * ​SX1308 step-up boost converter (Battery to 12V). * ​MOSFET switch to turn the 12V rail completely on/off via MCU to save battery. ​ 3 .Actuator Driver: RZ7899 H-bridge motor/actuator driver (12V). ​ 4 .Battery Monitoring: Resistor voltage divider linked to RA-09H ADC. ​ 5 .Connectors: Battery input, motor output, programming header, basic protection. 6 .Testing: Dedicated test points and exp...

I'm looking for a reliable DC power supply for my coil tattoo machine equipment. It needs to include a rechargeable lithium ion battery that will last running at 12 volts for a minimum of 13 hours. A 1/4” jack, a voltometer, an on off button, and a panel mounted voltometer at minimum. It needs to be as small as possible for ease of travel and obviously cordless unless charging. Thank you Requirements: - Type: DC power supply - Voltage: 12V - Current: 1A, 5A, or 10A (I'm unsure about the exact requirement) Ideal Skills and Experience: - Experience with power supply design and specifications - Knowledge of DC power supply units - Ability to provide recommendations for optimal current output Please provide a detailed proposal including your approach and any relevant experi...

Tôi cần xây dựng một hệ thống giám sát dựa trên Arduino để theo dõi nhiệt độ, độ ẩm, cường độ ánh sáng và trạng thái mất điện. Khi bất kỳ thông số nào vượt ngưỡng hoặc khi mất nguồn, hệ thống phải gửi cảnh báo theo thời gian thực qua SMS; nếu anh/chị có thể bổ sung thêm thông báo trên ứng dụng di động thì càng tốt. Yêu cầu chính • Mạch Arduino hoàn chỉnh kèm sơ đồ nối dây, danh sách linh kiện và mã nguồn. • Cấu hình ngưỡng linh hoạt cho từng cảm biến, lưu trong mã hoặc qua giao diện cấu hình đơn giản. • Gửi SMS tự động (ưu tiên dùng SIM800L/SIM900 hoặ...

I need a layout in Microwind for a moderate complexity combinational logic boolean equation. The layout will primarily use AND, OR, and NOT gates, and will involve 5-10 gates. Ideal skills and experience: - Proficiency in Microwind - Strong understanding of combinational logic design - Experience with AND, OR, NOT gate layouts - Ability to work with moderate complexity boolean equations

I’m working on a new piece of industrial equipment and need a tightly-packed PCB dedicated to reliable power management. Space inside the enclosure is scarce, so the board must stay as compact as possible without sacrificing robustness or serviceability on the factory floor. Your job is to take my preliminary block diagram and turn it into a production-ready design: schematic capture, multilayer layout, and the full manufacturing package. I’m flexible on tools—Altium, KiCad, or Eagle are all fine—as long as the output meets standard IPC guidelines and can go straight to my fabricator. Deliverables I need from you • Editable schematic and PCB layout files • Clean Gerber/NC drill set plus IPC-356 netlist • BOM with manufacturer part numbers and cu...

I am looking for an expert Electronics Design Engineer to review, optimize, and finalize a draft KiCad schematic for a custom, battery-powered audio logging device. The core architecture relies on an ESP32-S3-WROOM-1-N16R8-1U module paired with a TDK T5838 digital microphone featuring Acoustic Activity Detection (AAD). The device operates primarily in an ultra-low power standby mode: the ESP32-S3 stays in deep sleep with Wi-Fi completely turned off, while the TDK T5838 remains always-on to monitor the acoustic environment. When a sound trigger occurs, the microphone must wake the ESP32-S3 using an AAD interrupt (via D1, D2, or Analog AAD mode) to record audio onto a microSD card. The ESP32-S3 will wake up its Wi-Fi radio only during a specific, firmware-defined time window to transmit the ...

I need a complete design package for an LLC resonant converter that can charge a light-load capacitor to 1 kV in no more than 200 µs while keeping the primary current below 5 A. The magnetic component is fixed (Coilcraft FL2810-1LD), and I have already decided on a half-bridge topology, though I am open to brief notes that compare it with a full bridge if this materially improves performance. The work must cover the entire path from theory to verified LTspice waveforms: • Detailed report with full calculations that prove the 200 µs charge time, including reflected-load analysis, magnetizing requirements, and loss estimates. • Feasibility study quantifying how the 5 A primary side limit is maintained across the 5 V – 28 V input range. • Selection and sizin...

Hi I will share the details with the shortlisted candidates. Thanks

I'm looking for an experienced electronics engineer to develop a balance charger and discharger specifically for RC drones. The charger should support LiPo and Li-ion batteries, with a maximum voltage of 16.8V. Key Requirements: - Balance charging and discharging functionality - Support for LiPo and Li-ion battery types - Maximum voltage support of 16.8V - Suitable for RC drones - The user should be able to select the battery type, battery cells(1s,2s,3s,4s), calibrate voltage, modes such as quick charging/balance charging/discharging/storage charging. - The user should also be able to select the current. Ideal Skills and Experience: - Expertise in battery management systems - Expert in RC battery such as LiPo and Li-ion battery - Knowledge in embedded systems - Knowledge designing ...

Instalador de alarmas comunitarias con 14 años de experiencia en Chile. Desarrollo una central de alarma comunitaria propia y busco ingeniero electrónico con experiencia en potencia y RF para validar el diseño antes de fabricar las placas armadas (PCBA) en China. EQUIPO: central en gabinete metálico sobre poste, a la intemperie. Se activa con control RF o llamada; hace sonar sirena, enciende baliza y envía SMS. Hasta 250 usuarios, 50 reciben SMS. Panel web para administrar usuarios. HARDWARE: - ESP32 - SIM7600 4G (llamadas y SMS) - Receptor E07-M1101D (CC1101) 433 MHz ASK/OOK, controles de código fijo EV1527/PT2262 - Driver discreto de sirena y 2 relés - Batería 12 V 7 Ah - Antenas fuera del gabinete con SMA pasa-muro REVISAR: 1. E...

I’m opening up a Score 7T (Keefe Group) tablet built on the MediaTek MT8168, board id tb8168p1_bsp, and I need to force it into BROM mode by shorting the correct test points on the motherboard. I’ve done a few hardware-point jobs before, so I understand basic safety and ESD practice, but I want to follow an exact, proven sequence this time. What I expect from you • A clear, step-by-step set of written instructions—my preferred format—covering disassembly, test-point identification (CLK/DAT0 or any pad combination that actually works on this board), timing of the short, and verification with mtkclient. • High-resolution reference photos or annotated diagrams of the Score 7T PCB highlighting the precise spots to short. • Any firmware-side preparati...

Necesito un esquema y PCB completos en EasyEDA que integren los siguientes módulos y funciones: • Slot compatible para los módulos Lilygo SIM7000G y A7670SA. • Dos INA219 independientes: uno para medir la batería y otro para el panel solar. • Regulador de carga solar MPPT CN3791 para paneles de 6 V (entrada dedicada). • Sensor ToF VL53L1X integrado en la placa más un conector para una versión externa. • Cargador de batería basado en TP4056 con sus protecciones. • Conector para batería 18650 y, adicionalmente, para batería Fanso. • Encendido controlado mediante reed switch y MOSFET. • Elevador MT3608 fijado a 5 V. Dimensiones deseadas de la tarjeta: 110,54 mm × 32,89 mm (pue...

I want to make a dissertation project on EV charger with some topology and control scheme with adaptive current control

I'm seeking an experienced developer to create a wearable LED suit for professional stage performances. The suit should be controlled by ESP32 controllers and feature WS2812B addressable LED strips and side-glow fiber optics. Objective : Building LED-embedded costumes synced to music beats using Raspberry Pi and XLights. Each costume will have one Raspberry Pi 4 (slave), connected to 4 or more customized relay/driver boards—each controlling a specific body zone (head, arms, chest, legs). We need help configuring GPIO outputs via FPP and customizing the relay/driver boards to handle high-power LED/fiber optics/LED cloth sheet outputs, with independent control of lighting patterns for each zone. The setup must respond to a central master Pi broadcasting music-synced commands wir...

Seeking KiCad PCB Project Archives for AI Training Dataset We are looking for PCB designers, engineering teams, freelancers, and PCB design companies who have existing archives of KiCad PCB projects that they own and may be interested in licensing for AI training and research purposes. We are not looking for new PCB designs or any additional engineering work. We are specifically interested in old, completed, inactive, or archived KiCad projects that are already available. #Requirements - Minimum preferred volume: 100+ KiCad projects - Projects must be created in KiCad only - Editable source files are required - Schematic and PCB layout files should be included - Projects must be your own original work, or you must have the legal right to provide/license them - Projects must not be take...

I'm looking for an experienced power electronics engineer to design, build and test a single-phase synchronous buck power stage using GaN FETs. This is a test vehicle, not a product. The purpose is to measure switching behaviour, losses and temperature at high switching frequency. The scope is deliberately short and well defined. The work Single-phase synchronous buck, up to 40 A, outputs at 12 V and 48 V from an 80–120 V bus Power devices: EPC2305, two in parallel per position Gate driver: onsemi NCP51820 The design must be based on EPC's EPC90143 development board, extending its schematic and layout to the paralleled devices. EPC publishes the schematic, BOM and Gerber files Four-layer PCB, with the power loop returned on the first inner layer per EPC's layout guida...

My current audio board is built around a single amplifier stage and, while it works, the mid-range comes out sounding strained and unnatural. I want to retrofit an Automatic Gain Control IC that includes or works alongside an A/D converter so the signal path is cleaner, background noise is lower, and those mids finally feel organic. Here’s what I need from you: • Select an appropriate AGC-equipped converter (or discrete AGC + standalone ADC) that plays nicely with the existing amplifier stage and overall supply rails. • Provide a concise schematic showing how the new IC drops into the signal chain, including any necessary attack/release timing components, input protection, and level-shifting. • Supply a brief BOM with part numbers that are in stock from at least ...

I need a seasoned power-electronics engineer to take my concept for a small, isolated flyback switching power supply and turn it into a production-ready design for a consumer-electronics product. The supply must accept 230 V AC nominal but remain stable across the full universal range of 85–265 V AC. On the secondary side I want three rails—12 V, 5 V, and 3.3 V DC—sharing roughly 3–4 W total. Exact current splits can wait until you help me finalise the power budget. Compact size is the top priority, so I expect smart component selection, tight transformer design, and a PCB layout that keeps both footprint and height to an absolute minimum while still meeting creepage, clearance, and EMI/EMC requirements. Although efficiency and low standby losses matter (this will ...

I have a batch of 51-100 boards that need careful through-hole soldering, plus a small run of matching wire harnesses and a few damaged PCBs that require touch-up repair. All components are already sourced and labelled; I simply need steady-handed assembly and inspection so everything leaves my shop fully functional. You’ll be working with both through-hole parts and SMD repairs down to 0603 size, so solid joint quality, clean lead trimming, and consistent flux cleanup are vital. After soldering, each board must pass a quick continuity and visual check before you move on to the next. The wire harnesses are straightforward crimp-and-solder leads that plug directly into these boards, and I’ll provide the pin-out diagrams. Deliverables: • 51-100 fully soldered, tested throu...

Hi I will share the details with the shortlisted candidates. Thanks

I'm looking for a skilled electronics designer to create two custom circuit boards for a car. Requirements: 1. Steering Wheel Control Board: - Manage cruise control and 20+ reprogrammable gameplay buttons. - Must be reliable and responsive. 2. Shifter Position & Power Functions Board: - Handle shifter position data. - Control power functions to manage other circuit boards. Ideal Skills: - Experience with automotive electronics. - Proficient in circuit design and PCB layout. - Familiarity with microcontrollers and input/output handling. Please provide samples of previous work and a brief outline of your approach. Must be in a small form that does not exceed the size larger than 8 inches ( Similar layout to a 2018 Chevrolet Silverado LT steering system + shifter la...

I'm seeking a skilled PCB designer to create a compact PCB for digital inductive proximity sensors. The design must prioritize noise reduction and temperature stability. Key requirements: - Small form factor - High noise reduction - Excellent temperature stability Ideal skills and experience: - Expertise in PCB design for digital sensors - Experience with noise reduction techniques - Knowledge of temperature stability in PCB designs - Proficiency in relevant design software (e.g., Altium, Eagle) Please provide examples of similar work and a brief plan for this project.

I need a skilled electrical engineer who can produce clear, code-compliant circuit schematics and detailed layouts for both residential and commercial projects. All drawings must be created in AutoCAD Electrical and Cadmatic, keeping the two files fully aligned so that edits in one platform are reflected in the other. Scope of work • Create single-line and full schematic diagrams. • Develop plan-view layouts for lighting, power distribution, and security systems. • Annotate every drawing with wire sizes, breaker ratings, load schedules, and panel references. • Deliver native DWG and Cadmatic files plus PDF issue sets. What I’m looking for • Proven experience with AutoCAD Electrical and Cadmatic on residential and commercial jobs. • Familiarity ...

1. Project Overview & Architecture The goal of this project is to design a set of modular, decentralized expansion PCB boards for grow tent automation. Instead of a rigid central mainboard, each expansion board functions as an independent node powered by a localized ESP32-C3 Supermini module, communicating via Wi-Fi/MQTT through ESPHome into Home Assistant. To reduce clutter and eliminate the need for multiple external power supplies, all boards will share a common power distribution concept: 12V DC Input (via standard 5.5x2.5mm barrel jacks or terminal blocks) with onboard step-down regulation (e.g., Buck converters) to supply 5V and 3.3V where needed, allowing a single 12V barrel power supply to be daisy-chained across boards. 2. General Requirements for All Boards Microcontroller: ...