PCB Layout Jobs

Ich habe bereits einen funktions­tüchtigen Prototypen auf Basis eines ESP32-WROOM-32 aufgebaut, stoße jedoch bei der Fein- und Serien­entwicklung an meine Grenzen. Ich suche deshalb Unterstützung, die Hard- und Software gleichermaßen abdeckt, um das Gerät für Trainings­puppen von Einsatzkräften zur Marktreife zu bringen. Was das System künftig zuverlässig leisten soll: • Audio ausgabe – wahlweise vorab gespeicherte oder per Funk übertragene Signale • Wärme­abstrahlung, damit eine Wärmebild­kamera die „Person“ erkennt • Bewegungs- und Geräusch­erkennung zur Interaktion mit Rettungs­kräften • Akkubetrieb mit intelligenter Energie­verwaltung (min...

FM-transmitter for 433 MHz (BFR93W transistor, electret mic front end, bias and tank network). What I need now is a compact, production-ready layout inside a 13.5 mm circular, 2-layer board that I can share with a PCB house without further edits. Everything will be done inside an EasyEDA Shared Workspace; once you send me your EasyEDA username I’ll make you an editor so you can work directly on the live project. The priority is to minimise interference while respecting the strict size limitation, critical component placement around the RF path, and tight signal-routing clearances. If you’re used to controlled-impedance traces, short RF loops, and grounding tricks on tiny boards, you’ll feel right at home. Deliverables I expect at hand-off: • Finalised EasyEDA desig...

I have an air-quality monitor prototype on breadboard and now need a production-ready PCB. The core of the board will be an Arduino Nano, linked to Wi-Fi for cloud logging and OTA updates. Only a particulate-matter sensor has to be integrated at this stage, but I’d like the layout to leave space and headers so a future gas sensor can be dropped in without a full redesign. What I expect from you: • Complete schematic, PCB layout and clean routing for the Nano, Wi-Fi module, particulate sensor, regulated power path (USB-5 V input and Li-ion option), plus an on-board antenna or footprint. • Clearly labelled break-outs for I²C, UART and an SPI port, and pads for an optional 0.96" OLED or similar display. • All design files (KiCad or Altium), Gerbers, dr...

I’m putting together a compact desk ornament that spins on command, and I need a complete PCB solution to drive the rotation reliably. The ornament will only move when a small switch is flipped—no sensors, no remotes, just simple manual control feeding a quiet motor. Main Features: • main power source is 5V from USB to DC power jack connected to board via JST-PH cable 2pin socket. • 3.7V 800mAH Lithium chargeable battery as backup power source, connected via JST-XH cable. • 3-way SPDT switch(on, off, timer) connected to the PCB via a JST-XH cable. • 3V DC motor with peak current around 3A, connected to board via JST-PH(2pin) • 2 mounting points (M3 size to allow M2.5 bolts) Here’s what I’m after: • Schematic and PCB layout for a ...

Hello , I need a complete design for a compact consumer-electronics board that revolves around a PIC microcontroller. The scope spans three tightly-linked parts: • PCB hardware – Produce the schematic and multilayer layout in Altium Designer, include all libraries you create, and deliver the full manufacturing package (Gerbers, drill files, pick-and-place, and a PDF schematic). • MCU firmware – Write well-commented code in MikroBasic (or another PIC-friendly tool if you justify the switch). The firmware must read multiple sensors, exchange data through an efficient serial protocol, and use smart power-saving modes to stretch battery life. Please supply project files, compiled HEX, and a short flashing guide. • PC interface – Build a Windows utility in VB....

I need a complete design for a compact consumer-electronics board that revolves around a PIC microcontroller. The scope spans three tightly-linked parts: • PCB hardware – Produce the schematic and multilayer layout in Altium Designer, include all libraries you create, and deliver the full manufacturing package (Gerbers, drill files, pick-and-place, and a PDF schematic). • MCU firmware – Write well-commented code in MikroBasic (or another PIC-friendly tool if you justify the switch). The firmware must read multiple sensors, exchange data through an efficient serial protocol, and use smart power-saving modes to stretch battery life. Please supply project files, compiled HEX, and a short flashing guide. • PC interface – Build a Windows utility in VB.NET ...

I'm looking for an experienced professional to create electrical single line diagrams. The diagrams must adhere to international standards. Requirements: - Expertise in drafting single line diagrams - Knowledge of international electrical standards - Proven experience in similar projects Ideal Skills: - Proficiency in electrical design software - Attention to detail and accuracy - Strong background in electrical engineering Please include relevant experience in your application.

Abstract: Manufacturing-Ready 130nm CMOS Inverter Design The objective of this project is to design, verify, and prepare a standard CMOS inverter for fabrication using the SkyWater 130nm Open-Source PDK. Unlike theoretical projects, this work follows a complete "Silicon-to-GDS" flow. The process begins with Schematic Capture and Pre-Layout Simulation to establish electrical baselines. This is followed by Physical Layout, where the geometric structures of the NMOS and PMOS transistors are manually drawn according to strict foundry Design Rule Checks (DRC). The design is then validated through Layout vs. Schematic (LVS) to ensure physical-electrical equivalence. Finally, Parasitic Extraction (PEX) is performed for Post-Layout Simulation to account for real-world wire resistance and...

igid-Flex PCB Design for Smart Ring Wearable I’m developing a compact smart ring device and need an experienced PCB engineer to design a rigid-flex PCB. The design includes: A flex PCB section (polyimide) that wraps around the inner circumference of a ring Two gold-finished contact pads on the flex section that interface with the user’s finger A rigid PCB section that connects to the flex and hosts electronics Scope of work: Design a single-piece rigid-flex PCB Flex section with exposed ENIG pads (dimensions and spacing will be provided) Proper coverlay usage and manufacturable rigid-flex stack-up Clean routing of high-impedance analog signals from flex to rigid section Mechanical alignment features and reliable rigid-flex transition Requirements: Proven experience...

I need a control system for an RO (Reverse Osmosis) water filtration setup. The system should manage a water pump, measure the depth of water in a tank, and integrate inline TDS meters (total dissolved solids) before and after the membrane filtration. Key Requirements: - Control water pump: automate and manually switch on/off - Measure and display water depth, TDS levels, and pump status on a color screen - Auto and manual override settings - Combination of touchscreen and physical buttons for interface - Enclosed in a protective box Ideal Skills & Experience: - Experience in designing control systems - Proficient with electronic interfaces (touchscreen and buttons) - Knowledge in water filtration systems and TDS meters - Ability to create user-friendly display layouts Looking forwa...

I’m building a small sports POV camera system (VisionCam V1) using a Raspberry Pi Zero 2 W + Raspberry Pi Camera Module 3 Wide (IMX708). I need (A) a simple power/charging board design and (B) a reliable recording service/software for the Pi. Important: My total budget is $600 max for the full scope. Please do not apply if your quote will exceed $600. ⸻ A) Power / Charging Board (Pi Zero 2 W) Goal: Stable power + safe charging for a LiPo, designed for a compact wearable camera. Requirements: • LiPo charging via pogo-pin contacts (no open USB charging port preferred) • Power-path / load sharing so the device can stay on while docked/charging (no reboot) • Stable 5V output to Pi Zero 2 W (with enough current margin) • Battery protection features (basic prote...

I need an experienced electronics/PCB engineer to design a reliable, 24/7-operating traffic light controller PCB. This is a safety-critical system (not a hobby project). SYSTEM: • MCU: ESP32 • Load: 220VAC traffic light LED modules • Outputs: ~19 relay-controlled channels • Operation: Continuous (24/7) RELAY CONTROL: • Relay outputs driven via 74HC595 shift registers (SPI-style) • 3 × 74HC595 chained • OE pin must have hardware pull-up (outputs OFF at boot) • ESP32 enables outputs only after startup • Relay drivers with proper flyback protection FAILSAFE / SAFETY: • Master relay/contactor that cuts power to ALL lamp outputs • Must drop on: - ESP32 crash - Watchdog timeout - Power instability • Safe power-up and fail...

I’m building a CM5-based camera system and need an experienced hardware engineer to design a custom CM5 carrier board that supports an M.2 2230 A+E (PCIe) AI accelerator module (Hailo-class). This is for post-session AI processing (clip suggestions/tagging), not live gameplay. Scope / Requirements: • Design CM5 carrier board (schematic + PCB layout) • Route PCIe from CM5 to M.2 2230 A+E Key socket • Power design (stable rails for CM5 + M.2 module) + ESD/protection • Include required connectors for camera workflow (details will be shared after hire) • Provide mechanical notes for extra retention of M.2 module (screw/clamp/support pad) • Support bring-up/testing guidance Deliverables (Non-negotiable): • Full schematics + PCB source files (KiC...

Project Title: Electrical Engineer – Design of Universal Duplex Pump Control Panel Project Overview: We are developing a standardized duplex pump control panel to be sold as a commercial product worldwide. The goal is to finalize professional electrical engineering drawings, schematics, and a build-ready package for a compact control panel that operates two 3-phase pumps up to 25HP. The panel must be designed as a universal platform that can operate at 208/230V or 460V using simple component changes (conversion kits), without redesigning the control system. This is a product-development project, not a one-time building job. ⸻ Scope of Work The electrical engineer will be responsible for producing a complete construction-ready design package based on provided specifications, inc...

I need an engineer to take my concept for a high-voltage DC-DC converter and translate it into a complete, build-ready design that slots straight into a renewable-energy storage setup. The converter will accept 24 V DC at the input and deliver a regulated 165 V DC output. Efficiency, thermal management, and long-term reliability matter far more to me than squeezing every last cent out of the BOM, so component quality and sound topology choices come first. You will own the full electrical design flow—topology selection, key-component sizing, magnetics specification, control strategy, and all supporting calculations. I expect LTspice or an equivalent simulation environment to demonstrate stability, transient response, and efficiency before we move on to hardware. Once the numbers look...

Je souhaite développer un système embarqué destiné à l’automatisation domestique. L’objectif est de concevoir une carte compacte capable de dialoguer, via des modules de communication sans fil, avec divers capteurs et actionneurs déjà présents dans la maison ou ajoutés ultérieurement. Le travail inclut la phase matérielle (schéma et PCB), le développement du firmware et les tests de communication. Les protocoles sans fil à privilégier (Wi-Fi, Bluetooth Low Energy, Zigbee, etc.) pourront être définis selon la portée, la consommation et l’interopérabilité requises. Livrables attendus : • Schéma électronique complet e...

I’m putting together a dedicated, distraction-free reading device and need a hardware specialist who can take it from concept to working prototype. The display has to be an AMOLED panel of at least 11 inches—no compromises on that vibrant contrast. This will be a reading-only tablet, so efficiency, eye comfort, and battery life have priority over raw processing power. Wireless connectivity is essential for loading books and updates; Wi-Fi is mandatory, Bluetooth is optional. In addition, I want physical page-turn buttons on the bezel so users can flip pages without touching the screen. Touch input itself is welcome but not a requirement. Here’s what I’m expecting from you: • Source and validate the 11″+ AMOLED display and its driver board • Desi...

Necesito integrar cancelación de ruido activa (ANC) en mis protectores auditivos 3M PELTOR X2, pensados para un entorno industrial. El objetivo es que el nivel de ANC pueda regularse mediante un control manual fácilmente accesible en el propio casco y que todo el sistema funcione con baterías recargables para evitar el uso de pilas desechables. Busco a alguien con sólida experiencia en electrónica de audio que pueda: • Diseñar el esquema electrónico y la PCB necesaria para añadir micrófonos, etapa de procesamiento y amplificación. • Incorporar un potenciómetro o selector físico que permita subir o bajar la intensidad de cancelación. • Prototipar y probar el sistema directamente so...

Description: We need an experienced mechanical/product design engineer to design a manufacturing-ready (DFMA) IP67 enclosure and rugged external harness for a compact electronic device operating in dusty/humid environments, 0–50°C, and handled ruggedly. 1. Enclosure: - Target IP67 - Approx internal usable size: 70 x 40 mm - Power LED visible from outside (sealed lens/light pipe/window) - External ON/OFF switch while maintaining IP67 - Robust internal retention for PCB + battery 2. Harness: - 8 wires, approx 4 cm - One side to PCB inside enclosure; other side external with: USB-C charger, DC male power plug, 2 LEDs - Must withstand 10–20 connect/disconnect cycles per day - Provide rugged PCB connector + strain relief + IP67 cable entry (gland/grommet/ov...

Ho bisogno di una scheda elettronica su misura che gestisca esclusivamente sensori di movimento installati all’interno di un espositore. L’applicazione è quindi indoor: vorrei un circuito compatto, a basso consumo e in grado di dialogare in modo stabile con i sensori IR/PIR (o tecnologia analoga, se più indicata). Oltre al dimensionamento elettrico, mi interessa che vengano previsti i connettori giusti per un cablaggio rapido dentro la struttura espositiva e che l’alimentazione sia compatibile con i 5-12 V già presenti nello stand. Non ho vincoli sul microcontrollore: va bene qualsiasi soluzione diffusa e facilmente reperibile, purché la programmazione sia semplice da aggiornare in caso di future modifiche logiche. Deliverable richiesti &bu...

I need a clear and professionally drafted electrical single-line diagram based on the electrical load list along with safety features that shows how power will be distributed throughout a small-scale gas plant facility. The drawing must follow the NEC (National Electrical Code) so that it can be submitted directly to our local authority for review and later handed to the construction team without additional rework. Scope of work – Capture the complete power distribution path from the utility tie-in through to all downstream loads, including metering points and breaker information. – Use standard electrical symbology and layer naming so I can easily integrate the file into our master AutoCAD set. A clean PDF export is also required for circulation.

For my current university project I have to build a compact PCB whose only job is to collect data from several temperature sensors and route those readings to the rest of my prototype through simple wired connectors. Everything must be laid out and modelled inside Fusion 360, right down to the housing that will protect the board once it is fabricated. Here is what I need from you: • Create the full schematic and board layout in Fusion 360’s electronics workspace, optimised for straightforward sensor-integration and robust wired headers. • Export clean Gerber/Drill files plus the native Fusion 360 design so I can iterate later. • Model a 3-D printable enclosure in the same project file, dimensioned precisely to the finished PCB, with openings for the temperature-...

Necesito ayuda puntual para afinar un proyecto existente sobre ARM STM32. El hardware ya cuenta con: • Protocolo de comunicación binario implementado • Dos tiras WS2812 de 60 LEDs cada una, controladas de forma independiente • Módulo RFID PN532 • Conjunto de switches de entrada Mi prioridad ahora es la integración del RFID y los switches; los obstáculos que enfrento son Problemas de software. Quiero que ambos elementos se lean de forma fiable y se enlacen correctamente con el resto de la lógica ya programada. Busco a alguien con demostrable Experiencia en: – Desarrollo sobre microcontroladores STM32 (bare-metal o HAL). – Manejo de periféricos I²C/SPI, interrupciones y temporización precisa. ...

I need a professional to provide a fire alarm system plan for a commercial building. The plan must be stamped and certified by a PE or Electrical Engineer. Key requirements: - Design a fire alarm system plan. - PE/Electrical Engineer stamp and certification. Ideal skills and experience: - Licensed PE or Electrical Engineer. - Experience with commercial fire alarm systems. - Knowledge of safety regulations and standards.

I have a complete machine manual for industrial equipment written in English and supplied as a Word document. I need that entire text rendered accurately and naturally into Polish while preserving the existing structure, headings and page layout of the file. Your focus is purely on linguistic precision and correct technical terminology for industrial machinery (think operating procedures, safety instructions, maintenance schedules, specifications). No figure/ drawing / schematic translation. Please work directly in Word, keeping original styles intact and replacing English with Polish line-for-line so my engineering team can cross-reference sections easily. A good grasp of industry-standard terms is essential; if you normally rely on CAT tools such as Trados or MemoQ, feel free to do ...

I'd like to create a schematic and PCB layout that I can use to print from a photo I have. The layout is based on an ATmega and an ESP32, along with a servo connected to the ATmega. I'd like a guide on how to create a schematic file that I can modify and use in the future, not just the photos I have.

I’m putting together a small interface that lets a 5 V logic line drive a 12 V DC mechanical relay while keeping the control electronics completely isolated from the field wiring. My plan is to repurpose an off-the-shelf two-channel relay module for the load side and pair it with a standard optocoupler breakout on the control side; you can choose whichever optocoupler best meets the brief as long as it fits the isolation goal. What I need from you is a concise, ready-to-build circuit design: • A clear schematic showing the 5 V input network, the optocoupler stage, any necessary current-limiting or pull-down components, fly-back diode protection for the 12 V coil, and the wiring to the relay board. • A bill of materials with exact part numbers so I can order everything imm...

I need a compact, production-ready PCB that reliably converts an EDP 1.2 video stream into a MIPI CSI-2 output so I can interface an existing embedded panel with a camera-centric SoC. The job is purely about signal conversion; no additional processing or scaling is required. The core of the work is selecting a proven EDP-to-CSI bridge IC, building a clean high-speed schematic around it, and laying out a board that respects all impedance and length-matching rules for both the EDP and CSI-2 differential pairs. Please keep the stack-up simple enough for standard 4-layer manufacturing while still meeting the 100 Ω/90 Ω requirements. To speed integration on my side I also need the power-tree designed, the necessary reference clocks routed, and all test points clearly labelled fo...

I already have the full Bill of Materials and a set of clear reference photos; what I still need is a production-ready PCB layout that ties everything together. Your task is to handle both the component placement and the complete routing of a balanced audio driver board that runs from a single 5 V input and generates ±12 V rails internally. There are no fixed dimensions, so you can choose whatever outline best supports clean signal paths and sensible power-ground separation. The only mandatory hardware interface is XLR—please keep the footprint orientation practical for panel mounting. Preferred deliverables • Editable design files in KiCad, Altium,—or another mainstream tool that supports Gerber export • Gerber, drill, pick-and-place, and centroid files re...

We are developing an AI-based Automated PCB Inspection System and are currently working with a large set of assembled PCBs that are already fabricated and available at the QC-ready stage. We are looking for a seasoned PCB inspection and assembly expert to perform structured technical verification and visual quality assessment of these boards. The PCBs under review are high-reliability, multi-layer assemblies (4 to 28 layers) with dense routing and mixed component technologies (SMT + through-hole). Board sizes range from 50 × 50 mm up to 500 × 500 mm, across ~400 PCB variants. The main help required is two-fold: 1️⃣ Component Verification Against BOM Identify and verify every mounted component against the provided BOM Check part number, package, footprint, polarity, and ori...

I have an existing ATMS PCB design with current dimensions of 120 mm (L) × 55.55 mm (W). I am seeking an experienced PCB layout designer to reduce the overall board size by up to 20 mm in both length and width through layout optimization. Scope of Work / Requirements: * The schematic must remain unchanged. * No component replacement, modification, or value changes are allowed. * Only PCB layout optimization and placement/routing improvements are permitted. * Electrical functionality must remain 100% identical to the existing design.

I’m looking for an experienced PCB design engineer to create a compact PCB that integrates LTE and GPS functionalities in a single module. The design must include onboard antennas for both LTE and GPS, a charging circuit, and debugging options. All other design and component details will be discussed over chat. --- Functional Features (Antenna Design Requirements): The PCB should include onboard antennas for both LTE and GPS, similar to the integrated antenna design used in ESP32 modules. Antennas must be PCB-etched or chip-type, without external connectors. Proper RF impedance matching (50Ω) and matching networks should be implemented for both antennas. Ensure antenna isolation, ground clearance, and tuning for optimal LTE and GPS signal performance. Include antenna la...

A NRF52 based low power consumption BLE tag with 4G and GPS capabilities. Features: Microcontroller: NRF52, any GPS + 4G module operable in south america Power Supply: Lithium-ion Battery (600mAh+, auto-switching) Communication: Bluetooth + GPS + 4G Additional Components: RGB LED and Buzzer Reprogramming Method: SWD The board must consume the absolute minimum power (~10uA) until GPS + 4G is enabled via software.

I need a seasoned PCB designer located in Pakistan who can take a concept right through to production-ready files. The boards you create must interface reliably with Arduino, Raspberry Pi, and FPGA modules, so familiarity with their pinouts, signalling levels, and power budgets is essential. You’ll start by translating my functional requirements into clear schematics, then handle the full PCB layout, component selection, and DFM checks. I expect well-organised source files plus manufacturing outputs—Gerbers, drill files, pick-and-place, and an accurate BOM—with every revision traceable. If you prefer Altium, KiCad, Eagle, or OrCAD that’s fine; just let me know which environment you’ll use so I can open the files on my end. Because these boards may evolve...

45w Intelligent dual port charger

I need a miniature sine-wave transmitter board. I will supply the exact antenna footprint and the precise target frequency (it will be somewhere below 100hz, specified down to the decimal). Your task is to design a PCB smaller than 2 cm × 2 cm that generates a clean, low-distortion sine wave, feeds it to the antenna, and runs for at least one month on a single CR2032 coin cell. It has step sweep formula Long-term frequency stability, minimal harmonic content, and ultra-low power consumption are critical. Feel free to use discrete components, a low-power MCU with DAC, a numerically controlled oscillator, or any other architecture that can hit the spec while staying inside the tight footprint and power envelope. Deliverables • Complete schematic and PCB layout (KiCad, Altium...

I'm looking for a skilled electronics engineer to design a small circuit board for a home appliance. Requirements: - Use a 0.05 hp motor - 12V 600DC connector - Incorporate a push button switch - Add LED indicator - Include speed control functionality Ideal Skills and Experience: - Experience with circuit board design - Familiarity with motor control and home appliance electronics - Proficient in integrating LEDs and speed control mechanisms Please provide relevant experience and examples of similar work.

I'm looking for an expert to design a high-end home theater speaker system tailored for audiophiles. The system should include full-range drivers, ensuring the best sound quality. Key Requirements: - Design for audiophile-grade audio quality - Include full range drivers in the design - Provide detailed schematics and component specifications Ideal Skills & Experience: - Expertise in high-fidelity audio systems - Experience with speaker design, especially for home theaters - Strong understanding of full-range drivers and their integration - Ability to produce professional-grade design documents Looking forward to your innovative proposals!

I need a complete mixed-signal design for an eight-channel Bluetooth communication system: four inputs for data acquisition and four outputs for actuation or stimulation. The unit must span a wide frequency range—everything from standard audio bandwidth up into the low-MHz region—while keeping each output capped at 5 V, 5 mA so it remains safe for direct human-facing applications. Because the project will handle live data, the entire chain has to support real-time streaming over Bluetooth Classic; latency has to stay low enough that an audio-rate round-trip remains perceptually seamless. Inside the enclosure, you can split the path however you wish—purely analog front ends feeding ADCs, DSP blocks, then DACs and analog output buffers—so long as the final architec...

I already have a fully functioning ESP32-based sensor board in production, but the next revision needs to be tougher, safer and ready for the European market. Your task is to take my existing schematic and layout files, integrate solid over-voltage, ESD and short-circuit protection, and hand back a design that can pass CE. Beyond the circuitry changes, I also need a clear plan for functionality and environmental testing. Tell me how you’ll prove the new protections work, outline any test fixtures you expect to build, and call out components that may have long lead times or special sourcing considerations. To keep everything concrete, here’s what I expect to receive: • Updated schematic, PCB layout and Gerber/ODB++ files • Revised BOM highlighting any new protection...

I'm looking for a skilled hardware engineer with firmware experience to design a control system for a domestic heating product. Key Responsibilities: - Design microcontroller and power supply components - Develop basic control logic firmware Ideal Skills and Experience: - Expertise in microcontroller and power supply design - Firmware development proficiency, especially in basic control logic - Experience in temperature control systems is a plus

Necesito plasmar en una sola placa todo el sistema de control para seis tiras LED RGBW independientes basadas en el driver 2415F (protocolo de 2 hilos: Data + Clock). La idea es utilizar el módulo WT32-ETH01 —un ESP32 con Ethernet integrado— como cerebro de la solución, de modo que pueda gestionarse vía red local. Busco a alguien con experiencia intermedia demostrable en diseño electrónico y creación de PCBs que pueda: • Diseñar el esquema eléctrico incorporando el WT32-ETH01, las seis salidas de señal (Data y Clock por tira), la etapa de potencia necesaria para cada canal RGBW y la circuitería de protección. • Rutear la PCB procurando buena distribución de alimentación y se...

I need a 4-layer PCB layout that will drive a new consumer-electronics device. The board footprint is roughly 8 inches on its longest side and must sail through my manufacturer’s DFM/DFT checks without a single revision request. Core circuitry includes a microcontroller at the heart, a collection of digital and analog sensors, Wi-Fi & Bluetooth modules, a microphone, speaker, relay, display interface, GUI memory and associated logic. Please route with proper impedance control, isolation for the RF section, and attention to audio trace integrity so that EMI is kept to a minimum. Deliverables • Full Altium, KiCad or Eagle design files (your choice) • Gerber, drill, pick-and-place and BOM ready for turnkey assembly • Layer stack-up, controlled-impedance note...

I’m finishing a paper and need a neat, publication-ready analog circuit diagram drawn entirely in LaTeX. The schematic should rely exclusively on transistors FINFET or op-amps—so the layout stays focused on the active devices. Deliverables I’m expecting • A self-contained .tex file (circuitikz, TikZ or an equally portable package) that I can drop straight into my manuscript • A compiled PDF or PNG preview to confirm the output matches the source Clarity and compact, consistent sizing of the transistor symbols is important. Please comment the LaTeX so I can tweak labels or node names later. If you see a cleaner way to arrange the devices, feel free to propose it before finalizing.

I’m launching a new vending concept and need a specialist who can design, build, and integrate the complete technology stack that makes a modern machine tick. The work spans everything from the brain-level firmware to the customer-facing interface, so I’m keen to collaborate with someone who has both hardware know-how and solid software chops. Core objectives • End-to-end system architecture: controller board selection, wiring diagrams, and firmware that drives motors, sensors, and cashless peripherals. • Flexible payment acceptance: contactless cards, mobile wallets, or other proven modules—guide me on the best mix for reliability and PCI compliance. • Real-time data: cloud-based inventory and health monitoring that lets me see stock levels, sale...