Circuit Design Jobs

I'm looking for an experienced freelancer to help design a system that allows a stepper motor to be controlled by a synth sequencer through an Arduino or similar microcontroller. The primary goal is to achieve speed variation of the stepper motor, controlled using Control Voltage (CV) signals from the synth sequencer. Key Requirements: - Select appropriate components for interfacing a stepper motor with a microcontroller. - Ensure the system can interpret CV signals around 0-5V range to control motor speed. - Develop a circuit and code that allows seamless communication between the synth sequencer and the stepper motor. - Provide guidance on assembling the system and troubleshooting potential issues. Ideal Skills and Experience: - Strong knowledge of microcontrollers, particularly A...

I'm seeking an electronics engineer for a quick reverse engineering task. You will need to: - Acquire a small handheld radio device (cost will be covered) - Test the device - Carefully disassemble it - Capture clear, high-resolution photos of the internal PCB (both sides) - Reverse engineer the circuit into a clean schematic diagram Requirements: - Basic tools: multimeter, camera - Experience with disassembling gadgets and tracing circuits - 1-3 day turnaround Budget includes device cost—let’s discuss.

I’m looking for an electronics engineer to buy a stun gun or Taser (I’ll cover the cost), test it, carefully open it, take clear high-res photos of the PCB (both sides), and reverse engineer the circuit into a clean schematic diagram. This is a quick job with a 1–3 day turnaround. You’ll need basic tools like a multimeter and camera, and experience with disassembling gadgets and tracing circuits. Bonus if you’ve worked with high-voltage devices. Budget includes the device cost—let’s discuss.

I'm seeking an electronics engineer for a quick reverse engineering task. You will need to: - Acquire a small handheld radio device (cost will be covered) - Test the device - Carefully disassemble it - Capture clear, high-resolution photos of the internal PCB (both sides) - Reverse engineer the circuit into a clean schematic diagram Requirements: - Basic tools: multimeter, camera - Experience with disassembling gadgets and tracing circuits - 1-3 day turnaround Budget includes device cost—let’s discuss.

Project Description: I am seeking an audio electronics builder/designer to build a sample fully discrete, dual-mono, balanced line-level preamplifier, using AMB β22 ready made PCBs sourced from AMB, as well as all other components required. All components and information required for the build is available on their website below: Different alternatives are offered to complement this amplification PCB. We require the highestend alternative suggestions available on the website. Stage 1: Compilation of required components and cost including a brief description of the main constituents as well block diagram. All electronic components must be sourced from reputable distributors such as Mouser, Digikey, RS, Partsconnexion and/or part distributors designated manufacturers to avoid counterfe...

I'm seeking an experienced hardware developer to design a custom handheld gaming device. The primary function of this device will be to play custom games. The device must have physical buttons for controls. Key Requirements: - Development of a custom handheld gaming device. - Device should support custom games. - Physical buttons as the main control interface. Ideal Skills and Experience: - Experience in hardware design and development - Knowledge of gaming systems and custom game integration - Proficiency in creating ergonomic and user-friendly physical button layouts Please provide examples of relevant work and a brief proposal on how you would approach this project.

I'm looking for an experienced PCB designer to create and build a custom PCB for a radio prototype. The PCB will need to be between 5 cm x 5 cm and 10 cm x 10 cm, and must include the following features: - Wireless connectivity - Power management - Sensor integration Ideal Skills and Experience: - Proficiency in PCB design software - Experience with prototyping - Knowledge in wireless communication, power management circuits, and sensor integration Please provide your past work and relevant experience.

I need an electronic engineer to design a system using a digital camera to capture information from a small screen divided into four sections displaying codes of changing numbers and words in a sequence. This information needs to be processed in real-time and outputted in binary code. the numbers and words on the screen are captured by the camera and put into a electronic system then routed to a basic electronic system. a separate basic electronic system has a matching code and will match with the first electronic system from the camera. if this matches then the system will initiate a signal. more work similarly will be added to this . it is a simple project . I build electronics. I dont have capabilities to make a camera system that copies information from a phone screen. will fund in thr...

Hello Everyone, I’m looking for an experienced electronics engineer to design a custom ESP32-based mainboard for a time tracking terminal. This request is for PCB design only – I do not need prototyping or assembly at this stage. The final deliverables should be complete design files ready for manufacturing and future CE/EMC certification. Project Scope – PCB Design Only Design a complete, production-ready PCB with the following features: Core Hardware Features: • 5” Nextion display connector (NX8048P050-011C), top-mounted on the Board • PN532 NFC module, antenna placed on the bottom side of the PCB (under Display) • ESP32-WROOM-32 or ESP32-WROVER (with PSRAM) • 2× 16MB Flash memory (1× firmware, 1× OTA) • Wi-Fi ...

I need detailed schematics for both water and electrical systems for a small RV park. Water Distribution Schematic should include: - Pipe routes and connections - Water source and supply - Valves and shut-offs Electrical System Schematic should include: - Circuit diagrams and connections - Power source and distribution - Control panels and switches Ideal Skills and Experience: - Experience in creating utility schematics - Knowledge of water distribution systems - Expertise in electrical system design and diagrams - Attention to detail and accuracy

I need a PCB circuit designer to create a power management PCB for a consumer electronics home appliance, specifically led drivers Requirements: - Design a PCB for power management - Must be suitable for home appliance use - Experience with consumer electronics PCB design is preferred Ideal skills and experience: - Proficiency in PCB design software - Background in power management systems - Experience designing PCBs for home appliances

Revision 1 PT 100 Wireless Data Logger/Node for transmission on Wifi Halow The purpose of this project is to develop the following, and then we can mass produce for our own use in the future once we have the prototypes working. To develop a design of a wireless Node that can be deploy in real world, with a max case scenario of 60 nodes, and transmit a distance of max 300m without LOS to receiving end. Node to collect resistance from PT100 RTD, transmit resistance back to receiving end, and laptop(software) to convert resistance to temperature(°C) and show real time. Things to be provided 1) Customized PCB Design • Complete schematic and PCB layout, ready for fabrication. • Include footprint libraries and design files (Gerber, BOM, Pick & Place, Assembly drawings)...

I'm looking for an experienced electronics designer to create a versatile multi-microcontroller breakout board. The board should support the Heltec Wireless Stick V2 & V3, Adafruit Feather ESP32-S3 TFT, and LilyGO T-Display S3 OLED, while maintaining consistent pinouts for external peripherals. I want someone who can collaborate with me to work out the best option. I am an experienced PCB designer but don't have the free time to do this myself. Key Requirements: - Design a breakout board compatible with multiple microcontrollers OR multiple footprint identical breakout boards that accept the different microcontrollers. - Ensure consistent pinouts for easy peripheral integration. - Support for a variety of sensors: temperature, motion, light, rotary encoders, I2C, SPI devic...

I am seeking a skilled freelancer to help translate my Arduino-based breadboard project into a production-ready Kicad PCB design. The project involves using an Arduino micro board, bare components, integrated circuits, and accessory boards, all currently assembled on a breadboard. The goal is to create a professional, multi-layer PCB that is flexible in size, adapting to the component layout. Key Requirements: - Convert the existing breadboard setup into a Kicad PCB design - Ensure the design is suitable for production with a multi-layer layout - Optimize the PCB dimensions based on the component layout - Maintain functionality and integrity of the original breadboard project Ideal Skills and Experience: - Proficiency in Kicad for PCB design - Experience with Arduino and electronic circu...

I'm seeking an experienced firmware developer to convert an existing Raspberry Pi and ESP32 time-lapse controller into a dedicated embedded system. The new system should include: Essential Functionalities: - Time-lapse control - Remote monitoring - Data storage Required Communication: - Interface with a camera module and temperature sensor Connectivity: - Wi-Fi and Ethernet Ideal Skills and Experience: - Strong background in embedded systems and firmware development - Proficiency with Raspberry Pi, ESP32, and associated peripherals - Experience with Wi-Fi and Ethernet communication protocols - Knowledge in remote data monitoring and storage solutions - Ability to integrate multiple sensors and manage real-time data Please provide references of similar projects you have completed.

Project Proposal: Design and Development of a 12V, 30A Smart Lead-Acid Battery Charger Project Objective: The primary goal of this project is to design, develop, and manufacture a robust and intelligent battery charger for 12V lead-acid batteries. The charger must be capable of delivering up to 30 Amperes and should be compatible with a wide range of battery capacities (50Ah to 210Ah). The final product should be safe, efficient, and fully automatic. ________________________________________ Key Features and Functional Requirements: 1. Smart Charging (Multi-Stage Charging): The charger must not be a simple power supply. It should implement an intelligent multi-stage charging algorithm to ensure battery health and longevity. o Stage 1: Bulk Charge: Charges the battery at a constant maximum c...

I need an RF engineer to improve an existing 7 Tesla MRI coil. The primary goal is to reduce coupling and interference. Key Requirements: - Expertise in RF engineering and MRI technology - Experience with high-field (7T) MRI systems - Ability to analyze and modify coil design to minimize coupling and interference - CST Simulation with Schematic circuit assembly knowledge Ideal Skills: - Strong background in electromagnetic theory - Proficiency in simulation tools for RF coil design - Hands-on experience with MRI system components and troubleshooting Looking for a detailed proposal with a timeline and technical approach.

I need an electrical load letter for a residential building in New York City. This is required due to the installation of an additional AC unit. The letter must include load calculations. Ideal skills and experience: - Familiarity with NYC electrical codes and requirements - Experience with residential electrical load calculations - Ability to provide official load letters

Design of Voltage‑controlled oscillator based analog‑to‑digital converter using Requirements: - Develop a schematic capture and simulation - Provide simulation snapshots and videos for functional, timing, and noise analysis. -2nd milestone - Conduct a detailed noise analysis and performance evaluation and Deliver all design files, simulation results, and documentation. - 3rd Milestone

Project description – PCB design only (no manufacturing): Form factor: 2‑layer board, approx. 30 × 20 mm Sensors & interfaces: Gyroscope/IMU (ICM‑20948 or similar) – I²C bus TFS20‑L LiDAR – UART port (3.3 V logic) Data aggregation & USB: Microcontroller (e.g. ESP32‑S2 mini, RP2040 or STM32 with native USB) to read I²C & UART, package stream, and talk to USB UART→USB bridge can be internal to MCU (ESP32‑S2, RP2040) or discrete (CH340B / CP2102) Connector: USB‑C male (direct plug into Android phone) with proper CC resistors & ESD protection Power: Bus‑powered from phone if USB‑OTG supports it; otherwise include optional external 5 V rechargeable battery On‑board 3.3 V regulator (LDO or buck) and decoupling caps for sensors & MCU...

I need a simple PCB designed with the following components: - Fixed interval timer - Push-button switch - Battery - DC micro motor Ideal skills and experience: - Proficiency in PCB design software - Knowledge of timer circuits - Experience with motor integration

design a 12-bit Successive Approximation Register (SAR) Analog-to-Digital Converter (ADC) using 90 nm CMOS technology Key Requirements: - Develop a schematic capture of the 12-bit SAR ADC. - 1st Milestone - Provide simulation snapshots and videos for functional, timing, and noise analysis. -2nd milestone - Conduct a detailed noise analysis and performance evaluation. - 3rd Milestone - Deliver all design files, simulation results, and documentation. - 4th Milestone

I'm looking for a cost-effective and robust device to monitor the current draw of six 12V DC actuators used in a caravan roof lifting system. The device should trigger an audible alarm if a fault is detected, specifically when there is a ±20% current deviation between paired actuators. Alternatively, a memory-based system could be implemented to save each motor's current draw and trigger the alarm if the actual current deviates from the set threshold. The motors are 12V and the monitoring device must also be powered by 12V. An actuator failure would mean the fibreglass roof will break. The buzzer must be loud enough for the operator to hear it immediately so that they can visibly inspect the motor movement and stop actuator movement if required. Key Requirements: - Inst...

I need a circuit board designed for prototyping purposes. The board is intended to support analog components and will be used to connect 8 momentary switches that provide a shared ground. Requirements: - Design a circuit board for 8 momentary switches - Support for analog components - Prototyping purpose Ideal skills: - Experience in designing circuit boards, particularly for analog applications - Familiarity with momentary switch integration - Prototyping and testing skills

I need a band-pass filter designed for instrumentation purposes, specifically for handling analog signals within the 50-200 kHz frequency range. Requirements: - Design a band-pass filter - Frequency range: 50-200 kHz - Application: instrumentation - Signal type: analog Ideal Skills and Experience: - Expertise in analog filter design - Experience with band-pass filters - Knowledge of instrumentation signal requirements - Proficiency in circuit simulation and analysis tools

I need a band-pass LRC frequency filter to reduce current flow around 100 kHz, addressing overheating MOSFETs in my half-bridge amplifier system. Key Requirements: - Operate in 1-500 kHz frequency range. - Decrease current flow around 100 kHz (50-200 kHz) - Design using discrete components. - Open to component brands and specifications. Ideal Skills and Experience: - Expertise in LRC filter design. - Experience with high voltage systems. - Proficiency in working with discrete electronic components. Please provide a detailed approach and relevant experience.

I'm seeking assistance with debugging the Ethernet transmission logic on my TANG nano 20K FPGA board, which is connected to a Hanrun HR961160C module featuring the WIZnet W5500 chip. I am attempting to send an ARP request to my laptop via an Ethernet cable, but I am not receiving any packets. I have the code available and need a detailed code review and correction. Key Requirements: - Review and correct the Ethernet transmission logic in the provided code. - Ensure proper configuration and operation of the W5500 chip. - Identify and resolve any issues preventing successful ARP request transmission. Ideal Skills and Experience: - Strong understanding of FPGA programming and Ethernet protocols. - Experience with the WIZnet W5500 Ethernet chip. - Proficiency in debugging and correcting...

We are seeking an experienced electronics engineer to design an auxiliary power supply module that converts a high-voltage DC input of 2500V to a stable 24V DC output with a maximum power of 5W. The design must adhere to specific requirements and constraints (Refer attachment) to minimize high dv/dt and ensure a non-dissipative approach. This project requires expertise in high-voltage power electronics, switched capacitor converters (or alternative non-dissipative techniques), schematic design, PCB layout, and simulation.

We are looking to develop a custom 3D printer control board based on the STM32F401CCU6 MCU, designed for low-cost yet feature-rich applications. The board should support up to 4 stepper drivers (DIP type, compatible with DRV/TMC series), a heated bed, hotend heater, thermistors, 12864 LCD or TFT, filament sensor, BLTouch/Z-probe, and microSD card. All through-hole components are preferred where possible to simplify assembly. The goal is to enable basic Marlin or Klipper compatibility without overcomplicating the design. You can reuse or adapt open-source designs like Morpheus, SKR DIP, or similar STM-based boards, but the layout must be updated to match F401 pinout and capabilities. Key requirements include over-voltage and over-current protection, use of fuses or TVS diodes, and well-iso...

Project Brief: Stealth-Modified Automatic Parking Disc (Certified for Public Road Use in Germany) Project Goal: I want to technically modify a certified electronic parking disc approved for use in Germany (must have an official certification number and ECE approval), so that it continues to automatically update the displayed parking time even after the vehicle has been parked. This modification must be invisible and undetectable from the outside, meaning the device must look and behave like the original product to any observer or parking enforcement officer. Background: Standard electronic parking discs are designed to detect when a vehicle is turned off and then freeze the display at the next permissible half-hour mark. This allows parking enforcement to determine how long the car has b...

I'm seeking an experienced PCB layout design engineer for a single-layer PCB. The application is for a waste controller system, and the design should be compact, fitting within a small size of less than 10cm x 10cm. Ideal skills and experience: - Expertise in single-layer PCB design - Proficiency with PCB layout software (e.g., EasyEDA) - Experience in designing PCBs for industrial equipment - Attention to detail and ability to meet size constraints Please provide examples of previous work and relevant experience.

I'm seeking a skilled technician to assist with the repair of existing custom electronics, specifically DIY kits or prototypes. The task involves basic repair work, such as replacing components. Key Requirements: - Experience in repairing custom electronics - Ability to replace components accurately and efficiently - Familiarity with DIY kits and prototype electronics Ideal Skills and Experience: - Proficiency in electronics repair and maintenance - Attention to detail and precision in handling electronic components - Strong problem-solving skills for troubleshooting basic issues If you have the expertise to handle these repairs, I would love to hear from you! Only apply if you have experience and are in the USA

I'm seeking assistance to find the appropriate LED driver for my setup, which includes a Lutron Sunnata Pro LED+ dimmer and seven Cree 3-Up XP2G LEDs. I need a solution that allows me to input 120V AC to the dimmer, have the dimmer output go to the driver, and then power the LEDs, with dimming capability via the dimmer. Key Requirements: - Compatibility with Lutron Sunnata Pro LED+ dimmer - Suitable for seven Cree 3-Up XP2G LEDs with a current requirement of 350mA - Ability to balance energy efficiency and maximum brightness - Must be UL Listed for safety and reliability Ideal Skills and Experience: - Expertise in LED lighting and driver compatibility - Knowledge of electrical standards and certifications - Experience in selecting and sourcing LED drivers for specific setups - Abili...

I'm looking for a skilled developer to create an interactive electronic system designed for gamification purposes. The system should respond to two simultaneous stimuli: a physical impact and the presence of a laser beam. The operating logic requires both events to occur at the same time to trigger a visual reaction, specifically color-changing lights. Key Requirements: - Develop a system using impact sensors and light detection sensors (or a laser sensor). - Connect sensors to a microcontroller to manage signals and execute conditional logic. - Ensure precise and controlled responses for gamification applications. - Implement color-changing lights as the visual reaction to the stimuli. Ideal Skills and Experience: - Experience with microcontroller programming and sensor integration...

I need an experienced PCB designer to improve my existing electronic board. The original design is unprofessional and requires updates. Key Tasks: - Review requirements - Update entire design - Prepare fabrication-ready files - Create a new board version with additional mounting holes and a custom logo/label Ideal skills and experience: - Proficiency in PCB design software (Gerber, Eagle, or KiCad) - Strong attention to detail - Experience with electronic board design for production Please provide a comprehensive quote.

HIRING: Electrical Engineer to Help Build Ozone Water Treatment System We’re building a plug-and-play ozone water treatment system using PEM-based electrolytic ozone — no chemicals, no air pumps, just water and power. We need help designing and sourcing: AC to DC power setup Flow-based activation (flow switch) Timer to control runtime Clear wiring + parts layout Goal: System runs automatically when water flows — safe, simple, and lasts 7+ years. You’ll deliver: Wiring diagram Parts list (Amazon/DigiKey/etc.) Basic install/setup instructions

I'm seeking an experienced electronics engineer to assist in developing a prototype device designed for personal communication over WiFi. The device will allow users to call other duplicates of the device. The prototype will incorporate several electronic components to ensure functionality and ease of use. Key Requirements: - Develop a prototype using the following components: - ESP32 board for WiFi connectivity - Volume wheel potentiometer for audio adjustment - Microphone and speaker for voice communication - LiPo battery for power supply - USB C charger port for charging - Momentary button or switch for power on/off - E-ink display for low-power visual interface - Joystick module to navigate a simple menu, including contact list and call history - Implement voice c...

I need circuits designed for an RF transmitter and receiver. The system should activate blinking LEDs and a sounder. Requirements: - Cost-effective and compact - 1000 ft coverage - Battery-powered - LEDs should blink in a specific pattern Ideal skills: - Experience with RF circuit design - Knowledge of battery-powered systems - Familiarity with LED control and blinking patterns - Ability to create compact, cost-effective solutions Deliverables: 1 Working breadboard prototype PCB layout Parts List Please provide relevant experience in your bids.

Simulación y Ajuste de Circuito en Automation Studio – Entrega Rápida ⸻ Descripción del Proyecto: Buscamos un freelancer con experiencia en Automation Studio para realizar una tarea puntual con entrega urgente (máximo viernes 12 de julio). Objetivo: Verificar los cálculos de un sistema, simular el circuito en Automation Studio, comparar los resultados con el análisis teórico proporcionado y realizar los ajustes necesarios en el circuito. Archivos que se entregarán: • Guía de desarrollo con análisis teórico. • Archivo original del circuito para simular en Automation Studio. Entregables requeridos: 1. Archivo de Automation Studio ajustado, funcionando correctamente según los resul...

Simulación y Ajuste de Circuito en Automation Studio – Entrega Rápida ⸻ Descripción del Proyecto: Buscamos un freelancer con experiencia en Automation Studio para realizar una tarea puntual con entrega urgente (máximo viernes 12 de julio). Objetivo: Verificar los cálculos de un sistema, simular el circuito en Automation Studio, comparar los resultados con el análisis teórico proporcionado y realizar los ajustes necesarios en el circuito. Archivos que se entregarán: • Guía de desarrollo con análisis teórico. • Archivo original del circuito para simular en Automation Studio. Entregables requeridos: 1. Archivo de Automation Studio ajustado, funcionando correctamente según los resul...

Simulación y Ajuste de Circuito en Automation Studio – Entrega Rápida ⸻ Descripción del Proyecto: Buscamos un freelancer con experiencia en Automation Studio para realizar una tarea puntual con entrega urgente (máximo viernes 12 de julio). Objetivo: Verificar los cálculos de un sistema, simular el circuito en Automation Studio, comparar los resultados con el análisis teórico proporcionado y realizar los ajustes necesarios en el circuito. Archivos que se entregarán: • Guía de desarrollo con análisis teórico. • Archivo original del circuito para simular en Automation Studio. Entregables requeridos: 1. Archivo de Automation Studio ajustado, funcionando correctamente según los resul...

Simulación y Ajuste de Circuito en Automation Studio – Entrega Rápida ⸻ Descripción del Proyecto: Buscamos un freelancer con experiencia en Automation Studio para realizar una tarea puntual con entrega urgente (máximo viernes 12 de julio). Objetivo: Verificar los cálculos de un sistema, simular el circuito en Automation Studio, comparar los resultados con el análisis teórico proporcionado y realizar los ajustes necesarios en el circuito. Archivos que se entregarán: • Guía de desarrollo con análisis teórico. • Archivo original del circuito para simular en Automation Studio. Entregables requeridos: 1. Archivo de Automation Studio ajustado, funcionando correctamente según los resul...

Simulación y Ajuste de Circuito en Automation Studio – Entrega Rápida ⸻ Descripción del Proyecto: Buscamos un freelancer con experiencia en Automation Studio para realizar una tarea puntual con entrega urgente (máximo viernes 12 de julio). Objetivo: Verificar los cálculos de un sistema, simular el circuito en Automation Studio, comparar los resultados con el análisis teórico proporcionado y realizar los ajustes necesarios en el circuito. Archivos que se entregarán: • Guía de desarrollo con análisis teórico. • Archivo original del circuito para simular en Automation Studio. Entregables requeridos: 1. Archivo de Automation Studio ajustado, funcionando correctamente según los resul...

Simulación y Ajuste de Circuito en Automation Studio – Entrega Rápida ⸻ Descripción del Proyecto: Buscamos un freelancer con experiencia en Automation Studio para realizar una tarea puntual con entrega urgente (máximo viernes 12 de julio). Objetivo: Verificar los cálculos de un sistema, simular el circuito en Automation Studio, comparar los resultados con el análisis teórico proporcionado y realizar los ajustes necesarios en el circuito. Archivos que se entregarán: • Guía de desarrollo con análisis teórico. • Archivo original del circuito para simular en Automation Studio. Entregables requeridos: 1. Archivo de Automation Studio ajustado, funcionando correctamente según los resul...

Simulación y Ajuste de Circuito en Automation Studio – Entrega Rápida ⸻ Descripción del Proyecto: Buscamos un freelancer con experiencia en Automation Studio para realizar una tarea puntual con entrega urgente (máximo viernes 12 de julio). Objetivo: Verificar los cálculos de un sistema, simular el circuito en Automation Studio, comparar los resultados con el análisis teórico proporcionado y realizar los ajustes necesarios en el circuito. Archivos que se entregarán: • Guía de desarrollo con análisis teórico. • Archivo original del circuito para simular en Automation Studio. Entregables requeridos: 1. Archivo de Automation Studio ajustado, funcionando correctamente según los resul...