Diseño de circuitos Jobs

I need a complete KiCad design that reproduces the functionality of the Radiomaster XR1 transmitter. Exact mechanical dimensions are not critical (although size should be minimal), but every feature the original offers must be present and proven to work over ELRS eg dual 2.4GHz / 868-915Mhz. Firmware and pinout could be compatible with the Radiomaster firmware for simplicity. The job covers the full hardware cycle: schematic capture, PCB layout,manufacturing files, and a JLCPCB-ready BOM that relies solely on in-stock parts. With the exception of the required ESP devices, all active and passive components must be Western-sourced equivalents that JLCPCB can place. To confirm your suitability, please show photographs and a short write-up of at least one, preferably more previous Exp...

The primary challenge in MEMS readout design is capturing microscopic, sub-femtofarad variations in sensor capacitance without the signal being overwhelmed by parasitic noise or electrical interference. While a front-end switched-capacitor (SC) network is highly effective for this capacitance to voltage conversion, its resolution is heavily limited by the non idealities of the internal amplifier. Dynamic amplifiers offer an excellent solution for low-power operation, but they suffer from severe gain variations and performance degradation when moving from theoretical models to practical hardware realization. Key Objectives of this Work: 1. SC Circuit Optimization: Design a switched-capacitor network capable of detecting sub-femtofarad changes while minimizing background noise. 2. Amplifier ...

I need a compact, low-noise analog front end for a multi-lead ECG built around the Texas Instruments ADS1298. The goal is a fully validated schematic and PCB layout that can capture clean ECG signals, digitise them through the ADS1298, and present the data via an SPI interface for a downstream MCU. Key points of the job • Core converter: ADS1298 integrated correctly with its internal PGAs, reference, and bias generation. • Signal chain: front-end instrumentation amplifiers, right-leg drive, antialias and mains-rejection filtering sized to meet IEC 60601 ECG bandwidth/noise limits. • Power: dual-supply or single-supply rail architecture with proper isolation and low-drop regulators. • Safety & compliance: pay attention to patient-isolation clearances and leaka...

I need detailed review/design work for the electrical system of a waste paper recycling production line to the Australian Standard. It has been designed in China and the system has been tested. This includes reviewing/rectifying the design of control panels and integrating the system with the BMSB, MCC and field equipment. Key Requirements: - Proficiency in Australian electrical design - Detailed engineering design expertise - Focus on electrical systems - Experience with control panel design ________________________________________ 2.1 Electrical Services Design & Documentation Scope of Services 1. Maximum Demand calculation and SLD draft 2. Main power distribution design from BMSB-1 and BMSB-2 to all MCCs to the equipment 3. MCC power and control system design review and rectify...

More details: Which software tool should be used to recreate the schematic? Altium What information should successful freelancers include in their application? Experience Do you have any specific requirements or standards that the schematic must adhere to? Industry standards

I need a precise, low-resistance solder joint made on the battery leads of my drone. The task is straightforward: take the existing electrical wire coming from the battery pack and solder it securely to the designated battery connection pads/connector on the airframe. A clean, shiny joint with proper strain relief is crucial so the connection can handle both current spikes and the vibrations that come with flight. Bring whatever tools you feel most confident with—a temperature-controlled iron, fine rosin flux, decent solder (60/40 or lead-free is fine if you’re comfortable), and heat-shrink tubing for insulation. Once the joint is complete, I’ll do a quick continuity and voltage drop test; as long as it passes and looks solid, the job is done. If this is something you c...

I need a senior-level electrical engineer who can split time between working remotely and being on site in Orange County, CA. The project centers on motor-control electronics, so every board you design must reliably drive, sense, and protect a variety of motors under real-world loads. Here’s the flow I expect: • Draw the schematic and capture the BOM for a new motor-control PCB, selecting components that meet cost, thermal, and EMI constraints. • Lay out the board for manufacturability, noise immunity, and serviceability, then generate all fabrication and assembly files. • Oversee prototype builds, bring the hardware up in the lab, and run functional, thermal, and load tests with my existing motor rigs. • When issues surface, dive into trace analysis, osci...

I need a compact, kitchen-chimney-friendly PCB that drives an ultrasonic transducer in the 40 kHz – 60 kHz band from an AC-mains supply. The goal is a reliable, low-cost circuit that keeps insects away without adding bulk or noise to the appliance. Here is the scope I have in mind: • Circuit conception and PCB layout, mindful of minimal component count and low BOM cost • Full documentation package—schematic, PCB design files, Gerbers, pick-and-place data, and detailed BOM with part numbers and estimated pricing • Advice on a suitable microcontroller or discrete-logic approach; I’m open to Arduino, ESP8266, PIC or any alternative that meets cost and space targets • Consideration for safe mains rectification, filtering and isolation so the board ...

I need a complete electrical and mechanical design for a Framework Laptop expansion card built around the RP235xA microcontroller in the 30-GPIO QFN-60 package. My top priority is that everything fits perfectly inside the standard expansion-card envelope defined in Framework’s official repository (). Key requirements you must hit • Use the RP2350 and expose all USB-C power and signal constraints exactly as the Framework reference dictates. • Keep the card flush: no part of the PCB, component or connector may project past the official boundary. • Place two tactile switches (reset and boot) plus one RGB LED (I’m thinking WS2812 or equivalent) and one status LED on the underside so they are visible and accessible when the card is plugged into the laptop. ...

I need a set of clear, installation-ready Visio drawings for a BACnet-based Building Management System covering the HVAC network only. The finished file must show every thermostat, air-handling unit, and chiller in the project, wired and addressed exactly to the specifications I will provide—these include the exact brands and models that must appear on the legend. Here is how I picture the work flowing: • You receive my equipment schedule, network topology notes, and the mandatory device makes/models. • You create a layered .vsdx that cleanly separates power, communications (BACnet MS/TP and/or IP as noted), and control wiring, using standard BACnet symbols and stencils. • We do a quick review so I can mark up any tag changes or address corrections. • You ...

I need a compact, reliable AC solid-state relay designed specifically for driving pump loads. The control side will accept 3–32 V DC, while the load side must safely switch 24–380 V AC at a continuous 25 A. Core expectations • Status indication via a front-panel LED • Full opto-isolation between control and load • Zero-cross switching is preferred to minimise inrush, but I will consider a non-zero-cross solution if it offers clear advantages for motor-driven pumps. • The housing should be compatible with a standard heat-sink footprint, and I am open to either DIN-rail or panel mounting depending on what your thermal calculations show to be most practical. Deliverables 1. Full schematic with component values and reference designators 2. PCB ...

I have the full schematic for working legacy PCB. I need it redesigned and modernised into a new board using current components, while keeping the original board size, mounting holes and connector positions. The old design uses PIC18F8722, FT232RL, TDA7465, video switching and RCA outputs. The new design should replace those with STM32 native USB, modern audio DSP/codec, protected coin inputs, modern power regulation, and custom firmware support. This is not an exact clone. It is a modern drop-in replacement using the original schematics as a reference. Key things :- Keep: * Board size: 168mm × 206mm * 6 mounting holes * USB-B position * Existing amp connectors * Mic input * Coin mech interface * IR receiver/service button * J8 motherboard audio input Remove: * RCA sockets * Vi...

I have a small home-automation module that needs a reliable touch interface, so the task is to engineer a 5 V circuit around the TTP223 that cleanly switches between high and low digital levels whenever it is touched. Precision in sensitivity and long-term stability matter more to me than squeezing out the very last microamp, yet the design should still sit comfortably in standby without wasting power. Key expectations • The sensor must tolerate normal household electrical noise without false triggering. • Output logic levels must be directly MCU-friendly (TTL/CMOS, active-high preferred). • Component count should stay minimal; surface-mount parts are fine. • Any necessary debounce or filtering should happen in hardware rather than firmware. Deliverables 1. ...

I want to decide on the most appropriate semiconductor switch for a new switch-mode power supply design, with switching speed as the overriding priority. Although I initially considered a thyristor, I’m open to any device—MOSFET, IGBT, BJT or another alternative—that demonstrably outperforms the rest once the figures are on the table. Here’s what the work entails. First, analyse the SMPS topology and its expected operating conditions, then shortlist realistic candidates and justify the final choice in terms of rise/fall times, turn-on/turn-off losses, and any ancillary gate-drive or snubber requirements. Once the device is chosen, run a full simulation (LTspice, PSpice, SIMetrix, MATLAB Simulink or equivalent) that shows switching waveforms, efficiency trends over ...

Scope of Work & Deliverables 1. Circuit & Component Simulation Validate and simulate critical sub-circuits and component behaviors before moving to the layout stage (using LTspice, PSpice, or equivalent). Optimize the power delivery network (PDN), specifically the integration between the HLK Network module and the ESP32, ensuring proper noise filtering, decoupling, and voltage stability. 2. Schematic Review & Optimization Comprehensive audit of the existing schematic for signal integrity, protection circuits, and component ratings. Ensure proper implementation of hardware protection (e.g., TVS diodes, fuses, surge protection). 3. Thermal Simulation & Management (High Priority) Perform full Thermal Simulation (FEA/CFD) of the PCB and components under continuous 24/7 work...

I have a new consumer-electronics concept that needs a clean, single-layer PCB focused on reliable power-management. I’ll supply the functional block diagram and key electrical parameters; you translate this into a production-ready board. You’ll take the idea from schematic capture through to fabrication files, optimising track width, component placement, and thermal relief so the power stage remains cool and efficient. Standard tools such as Altium, KiCad, or Eagle are all fine—use whichever lets you work fastest without compromising quality. Deliverables I need at hand-off: • Editable schematic file • PCB layout file • Gerber, drill, and pick-and-place files ready for manufacturing • Complete, manufacturer-verified BOM with part numbers and f...

I have a run of industrial-grade PCBs that must be populated with both SMD and through-hole DIP parts—well over 500 individual components in total. Reliability is critical because the boards will sit at the heart of industrial equipment, so every joint needs to be crisp, void-free, and compliant with standard workmanship guidelines (IPC-A-610 or equivalent). Here is what I need from you: • Pick-and-place or precise hand placement of all SMD parts followed by reflow or hot-air soldering as appropriate • Clean, consistent hand-soldering of the DIP components, trimming leads flush afterward • Visual inspection under magnification and basic electrical continuity checks to confirm there are no bridges or cold joints • Return of the fully assembled boards, safely...

SKILLS:PCB Layout, EasyEDA, Electronics, Electrical Engineering, Embedded Systems, Circuit Design, Schematic Review, DFM, Gerber, BOM, Mixed-Signal Design DESCRIPTION: We need an experienced electronics / embedded hardware PCB designer for a confidential controller PCB project. The work must be done in EasyEDA. Important: full schematics, EasyEDA files, component details, connector mapping, mechanical constraints and architecture will NOT be shared publicly. Files will be shared only after NDA and IP Agreement are accepted. Project scope: 1. Review the existing schematics before PCB layout. 2. Identify schematic issues, missing values, footprint risks, connector or pin-mapping risks, power or grounding risks and manufacturing risks. 3. Prepare a correction list before PCB design starts....

I already have the full system architecture and every component selection locked in; what I need now is a seasoned PCB designer to turn that documentation into production-ready data using KiCad. The board will carry up to 10 A, so copper weight must be 2 oz or 3 oz and all plating details must follow the requirements outlined in the “” file I’ve shared. Because I specify the manufacturers for each part, the BOM has to reflect those exact sources with no substitutions. Apart from that, the focus is purely on translating my technical brief into clean, fabrication-ready output. Deliverables • KiCad schematic and PCB layout files • Optimised Gerber set for 2 oz / 3 oz copper traces • Excellon drill files for all through-holes • BOM and CPL that l...

I already have the full system architecture and every component selection locked in; what I need now is a seasoned PCB designer to turn that documentation into production-ready data using KiCad. The board will carry up to 10 A, so copper weight must be 2 oz or 3 oz and all plating details must follow the requirements outlined in the “” file I’ve shared. Because I specify the manufacturers for each part, the BOM has to reflect those exact sources with no substitutions. Apart from that, the focus is purely on translating my technical brief into clean, fabrication-ready output. Deliverables • KiCad schematic and PCB layout files • Optimised Gerber set for 2 oz / 3 oz copper traces • Excellon drill files for all through-holes • BOM and CPL that l...

I’m looking for a qualified electrician who can step in and handle a range of possible tasks on-site. The exact scope is still flexible—I may need anything from fresh wiring and fixture installation to troubleshooting and repair, or even a full safety inspection and test—but the common thread is that everything must be completed to code, documented, and left fully operational. Here’s how I’d like to move forward: • We’ll start with a quick call or site visit so you can review the current setup, confirm the load requirements, and flag any compliance issues. • You’ll then outline the best-practice approach, materials you recommend, and an estimated timeline. • Once agreed, you carry out the work, provide a brief completion report...

Our development team in Ahmedabad is moving into the next round of builds and I need clean, reliable power supply systems engineered from the ground up. The work ranges from choosing the right topology for each application through to producing fully documented schematics and layout drawings. Intermediate-level Microsoft Visio skills are essential because every diagram, layer and cross-reference will be handed straight to production and compliance for approval. You will interpret our electrical requirements, size components, run efficiency calculations, and capture every decision inside Visio so nothing is lost between design and assembly. Expect to collaborate with our in-house engineers by video call and chat; strong, clear communication will keep iterations fast and productive. Deliver...