Analog jobs

...now want to convert the existing prototype into a reliable, compact and industrial-grade controller PCB. Scope of Work * Review existing Arduino code and logic * Convert Arduino-based control logic to a suitable MCU platform such as STM32 * Design complete circuit schematic * Design industrial-grade PCB * 24 VDC industrial input/output * Isolated digital inputs and protected digital outputs * Analog inputs for welding voltage/current feedback * Welding voltage sensing with proper isolation * Encoder interface * DC motor / AVC motor control interface * Wire-feed motor control interface * Travel motor control * Relay/solenoid outputs * Welding ON/OFF control * Limit switch and fault inputs * RS485 / CAN communication * EMI/noise protection suitable for welding applications * Conn...

...3-axis accelerometer, optical heart-rate monitor, microphone, speaker and on-board flash. The board must seamlessly switch between battery operation and USB power, with integrated charging and safe power-path management so firmware updates and debugging over USB remain possible even while the battery tops up. Please handle the complete hardware flow: • Schematic capture • PCB layout with good analog isolation for the heart-rate front end • Clean breakout for the mic and speaker audio paths • EMI-conscious routing for the high-speed flash bus • Gerber files, drill data, pick-and-place and a curated BOM from mainstream suppliers I will review the design in KiCad or Altium, so provide source files in one of those environments plus PDFs for quick r...

...both cartridge and dock. Fully sourced BOM with exact supplier part numbers (LCSC / DigiKey / Mouser). Assembly and integration instructions. Application Requirement: Do NOT send generic copy-paste proposals. Briefly state in your first sentence: Which battery form factor you plan to use inside the 9×19 mm envelope. Whether you will use an ultra-low-power MCU or a pure analog/RC pulse-stretching circuit for trigger debouncing and laser duration....

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

...regulators (5V/10V rails) and low-noise LDOs (3.3V) for sensors. Sensors & Peripherals: Low-noise IMU (ICM-42688-P), BMP390 barometer, AT7456E analog OSD chip, USB-C, MicroSD slot, camera connector, GNSS, and telemetry ports. Bus Interfaces: SPI, UART, I2C, and CAN bus routing. Scope of Work & Deliverables: Board Outline & Stackup Definition: Define stackup (4 or 6 layers depending on routing density and ground plane requirements) and mechanical board dimensions/mounting holes. Component Placement & Routing: Strict ground plane separation (isolating noisy high-voltage switching power lines from sensitive IMU analog signals and high-speed SPI/MCU tracks). Thermal management and copper pours for power components. De...

...2x I2C LCD displays (16×2) · 2x water level sensor · 1x thermal printer · 1x 12V relay for motor – MCU‑controlled via transistor/MOSFET · 3‑pin power input: 5V, 12V, GND (supply already available) · 4‑pin programming port (ICSP: PGD, PGC, MCLR, GND) Deliverables 1. Schematic & PCB layout (Gerbers, BOM, Pick & Place) 2. Firmware (C for Microchip – MPLAB X) that: · Reads all sensors (I2C, analog, digital) · Reads flowmeter pulses via interrupt · Drives the 3 seven‑segment displays · Drives 2x I2C LCDs · Reads the 2x 5‑key touch keypad . Air pressure sensor · Controls 3 solenoid valves via GPIO → MOSFET · Controls the 12V relay for motor ...

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

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...--------------------------------------------- Complete Pipeline: ------------------------------- Trigger → Burst Generation → Transducer → Echo → Analog Front End → Gain/Filtering → ADC → DSP/Envelope Detection → Data Buffering → USB/Ethernet. Details: ------------- 1. Develop embedded firmware to control the acoustic transducer transmit/receive cycle. 2. Generate and precisely control the acoustic burst/pulse trigger, including frequency, pulse duration, number of cycles, and repetition rate. 3. Control the transition between transmit and receive modes with accurate timing. 4. Capture and process the received acoustic echo signal from the analog front end. 5. Implement appropriate digital signal processing, including filtering...

This project involves updates to signal processing, and possible EMI compliance updates on an existing board. The PCB has already passed Part 15 emissions, but there is reason to think it may not pass CE. The successful candidate will possess, at minimum, a BSEE and extensive experience with Altium. The specifics are adding a dual analog switch to low noise signals for a musical instrument. Some existing components may need to be moved. We are specifying US based freelancers only.

I need a custom mixed-signal circuit engineered from the ground up to drive an optical wireless communication link. The design must cleanly blend an accurate analog front-end—handling photodiode receive and LED/VCSEL drive stages—with the required digital processing blocks for modulation, clock recovery, and protocol framing. My priority is signal integrity across the entire chain: low-noise transimpedance amplification, precise ADC/DAC selection, and robust high-speed PCB layout that minimises jitter and EMI. Component choices should be commercially available and cost-effective for a small production run. Because the target is an optical wireless channel rather than Bluetooth, Wi-Fi, or Zigbee, you are free to choose or recommend the most suitable modulation scheme ...

I'm looking for an experienced KiCad engineer to develop a schematic and PCB layout from scratch. Key Requirements: - Schematic design and PCB layout in KiCad - Library management for custom components - Experience with analog, digital, and mixed-signal designs Ideal Skills: - Proficiency in KiCad - Strong understanding of electronic components and circuits - Attention to detail and accuracy - Good communication skills for project updates Please provide examples of previous work and relevant experience.

...linearity, noise, crosstalk, and transient response - Improve the design based on test results - Deliver schematics, BOM, drawings, raw test data, and editable design files Target characterization is approximately 10 Hz–250 kHz for the voltage/general-current paths and up to 500 kHz or higher for the high-frequency current path. Experience with Rogowski coils, capacitive voltage sensing, magnetics, analog electronics, signal integrity, power systems, and sensor prototype testing is preferred. Please share examples of similar sensor projects, the test equipment you can use, and confirm that you can meet the availability requirements above....

...Requirements The PCB will act as the main electronic controller for the RO plant and should be designed around an ESP32-based control system. The controller should support, as applicable: Digital Inputs * Float/level switches * Tank level inputs * Pressure switches * Plant fault inputs * Other ON/OFF field sensors Sensor Inputs * Flow sensors * TDS/EC or water-quality sensors where required * Other analog/digital sensors required by the final system Outputs The controller should be capable of controlling: * High-pressure pump * Raw-water/feed pump * Solenoid valves * Flush valves * Dosing systems where applicable * Other RO plant actuators The exact output architecture should be determined by the engineer based on the loads. Where pumps or high-power equipment cannot b...

...subscription Depending on their subscription level, I need the user to be able to access a limited number of features Payments must be processed through Stripe. Upon project completion, the Stripe account and databases must be linked to our accounts. Pricing and feature restrictions must be modifiable after development is complete. Actual State: Web application (SPA) for creating digital and analog signals. Stack: React 18 + TypeScript + Vite 6, styling with Tailwind CSS v4, Everything runs on the client side: no backend, persistence in localStorage, custom ES/EN i18n, and light/dark themes using CSS variables. No router, global state manager, tests, or linter configured. Website link (currently only contains placeholders for the required functions)

I’m sitting on a growing archive of live performances and studio sessions that need to be sculpted into short-form music reels for Instagram, TikTok, and YouTube Shorts. Each clip should feel like it was dug out of a 90s Hi-8 camcorder: warm color shifts, light film grain, soft flicker, occasional VHS glitches—anything t...compressed social-ready versions (H.264). Because there’s no hard deadline, you can pace the edits around other commitments—ideally delivering two to three reels per week once we find our rhythm. Consistency matters more than speed; I’d rather receive polished, on-brand pieces than rush the aesthetic. If you thrive on music video storytelling and have a toolbox full of retro plug-ins, LUTs, or analog overlays, let’s chat. I&...

...(DevKit) - Shared SPI bus: TFT screen + SD card (dedicated CS lines) - Capacitive touch TFT screen (ST7796S controller + FT6336U touch) - 2 separate I2C buses (Wire / Wire1) carrying: DS1307 RTC + EEPROM, dedicated settings EEPROM, MCP23017 (48V/24V rail relays), PCA9685 (motor PWM + backlight + enclosure fan/heater), 2x AS5600 angle sensor (azimuth/tilt), 3x ADS1115 analog-to-digital converter (4x LDR, battery voltage, anemometer, analog fallbacks), MPU6050 gyroscope, PN532 NFC module - 2 DC motors driven via BTS7960 drivers (enable signals on native GPIOs) - 48V and 24V power rail management (relay switching) - DS18B20 temperature probe (OneWire) - Rotary encoder (menu navigation) EXPECTED SCOPE OF WORK - Review/validation of the electronic schematic based on the provid...

...real-time relay threads on shared unisolated CPU cores will cause trip latency budget failures. 7. Automated COMTRADE PyTest Harness and FAT Plan Test Automation: Develop a Python PyTest suite to parse IEEE C37.111 COMTRADE files and run automated fault injection sweeps. Provide a Factory Acceptance Test (FAT) procedure matrix. Educational Focus: Explain how binary COMTRADE files store sampled analog data, how to verify trip timing programmatically, and why relying exclusively on manual button-push testing is inadequate for complex digital substations. Acceptance Criteria (Definition of Done) Criterion 1 (Universal Playbook Usability): The documentation must successfully serve as a generalized, step-by-step instruction manual that allows a student to create a brand-new protect...

...Management Systems like Anker 737 & thermal control hardware. I’m looking someone with a hands-on specialist who can own the phase, turning those drawings into a working assembly that can survive abuse testing and provide clean, reliable data. Your day-to-day focus will be: • Circuit design for the BMS daughter-boards, including cell-balancing, current-sense, protection FETs and all supporting analog/digital interfaces. • Thermal analysis of the pack and its integrated cold-plate, using your calculations to specify sensors, heaters, interface materials and control loops before committing them to hardware. Once the schematics and thermal stack-up are frozen, you’ll drive the board spins, source parts, assemble the prototypes and bring them up in the la...

...real-time relay threads on shared unisolated CPU cores will cause trip latency budget failures. 7. Automated COMTRADE PyTest Harness and FAT Plan Test Automation: Develop a Python PyTest suite to parse IEEE C37.111 COMTRADE files and run automated fault injection sweeps. Provide a Factory Acceptance Test (FAT) procedure matrix. Educational Focus: Explain how binary COMTRADE files store sampled analog data, how to verify trip timing programmatically, and why relying exclusively on manual button-push testing is inadequate for complex digital substations. Acceptance Criteria (Definition of Done) Criterion 1 (Universal Playbook Usability): The documentation must successfully serve as a generalized, step-by-step instruction manual that allows a student to create a brand-new protect...

...before/after Unrealistic fades Artificial-looking backgrounds Excessive AI smoothing Image Quality Final images should be: High resolution Sharp Professional Suitable for social media Suitable for advertising Suitable for website use Suitable for print marketing Expanded Layout Category Matrix: Aesthetic Categories Split & Editorial Polaroid & Scrapbook Salon & Barbershop Modern Tech UI Film & Analog Minimalist & Luxury Cyberpunk & Neon Social Media Stories Geometric & Architectural Vintage & Retro...

...real-time relay threads on shared unisolated CPU cores will cause trip latency budget failures. 7. Automated COMTRADE PyTest Harness and FAT Plan Test Automation: Develop a Python PyTest suite to parse IEEE C37.111 COMTRADE files and run automated fault injection sweeps. Provide a Factory Acceptance Test (FAT) procedure matrix. Educational Focus: Explain how binary COMTRADE files store sampled analog data, how to verify trip timing programmatically, and why relying exclusively on manual button-push testing is inadequate for complex digital substations. Acceptance Criteria (Definition of Done) Criterion 1 (Universal Playbook Usability): The documentation must successfully serve as a generalized, step-by-step instruction manual that allows a student to create a brand-new protect...

Analog Electronics Consultant — Remote Guidance for a Sensor Prototype We are building an analog sensing circuit and need an experienced engineer to guide us through it remotely. We do the bench work; you tell us what to do, what to measure, and how to interpret what we find. What you would actually do: Review our existing schematic and flag anything wrong or fragile Give us clear, specific instructions we can follow at the bench Tell us what to measure at each step and what reading indicates success When something does not work, help us isolate the cause rather than guess Improve our approach where you see a better way Must have: Good knowledge of Analog Circuit Design and real hands-on analog circuit experience Strong grasp of AC behaviour: resonanc...

I need a compact 2-layer board, no larger than 10 cm × 10 cm, that handles both analog and digital sections for a personal hobby project I’m putting together in my garage. I will give you the hand-drawn schematic and the key component datasheets; your job is to turn that into a clean, production-ready layout. The board should separate the noisy digital lines from the sensitive analog area, follow good ground-plane practice, and keep routing clear enough for a low-cost manufacturer to handle. Please work in the CAD tool you are most comfortable with—KiCad or Altium Designer are both fine—and make sure design rules reflect a standard FR-4 stack-up and minimum 6/6 mil traces. Deliverables: • Editable schematic and PCB files • Gerber, drill, ...

I need a fast-turnaround promo that merges crisp digital footage with punchy 3D animation to introduce our newest night-vision product. Your camera work must include authentic analog nightvision shots—no digital nightvision or simulated filters. "exploded view" animation of components will comprise the 3D animation portion. The master cut runs 30 seconds; a separate 15-second version should hit the same beats even harder. The story revolves around product features—product innovation, durability, and low-light clarity—delivered in an exciting, high-energy video strinking military, law-enforcement & hobbyist tones, suitable for the larger 2A community. Think dynamic pacing, aggressive sound design, and text callouts that pop without overshadowing the i...

...signal integrity, power stability, and component lifecycle (active MPNs only on DigiKey/Mouser/LCSC; no NRND/EOL). • Power Architecture: Optimize power sequencing across e-Fuse, dual buck converters (12V to 5V & 3.3V), and LDOs to eliminate ESP32 back-powering. 2. Peripheral & Circuit Integration: • Audio Subsystem: Integrate WM8960 audio codec (2x Class-D BTL speaker outputs + 2x differential analog MIC connectors). Resolve ESP32-S3 GPIO mapping conflicts with bootstrapping/flash pins. • Protected JST Connectors: - 1x Illuminated ON/OFF Switch (N-Channel low-side MOSFET + RC debounce + TVS). - 4x Dry-Contact Sensor ports (2-Pin JST with 10k/100nF RC debounce + bidirectional TVS). - 2x Active Sensor ports (3-Pin JST with PTC Polyfuse + 100nF decoupling + TV...

...Post-Processing: Apply a heavy CRT filter, VHS tracking lines that randomly appear at the bottom of the screen, and chromatic aberration (color fringing on the edges of the screen). Audio Design No HUD, No Menus: Everything is physical. The player reads text messages on a 3D phone model held in Miles's hand. The inventory is Miles looking down at his pockets. The Master Hiss: Put a low-level analog tape hiss on the master audio mixer. It should never be perfectly quiet. Voice Acting Direction: The actor playing Miles must NOT sound polished. Tell them to stutter, cut themselves off, take sharp breaths, and sound like they are on the verge of a panic attack. When he talks to himself, it’s a coping mechanism. The Landlord's Voice: Do not use monster growls. Pitc...

...Management Systems like Anker 737 & thermal control hardware. I’m looking someone with a hands-on specialist who can own the phase, turning those drawings into a working assembly that can survive abuse testing and provide clean, reliable data. Your day-to-day focus will be: • Circuit design for the BMS daughter-boards, including cell-balancing, current-sense, protection FETs and all supporting analog/digital interfaces. • Thermal analysis of the pack and its integrated cold-plate, using your calculations to specify sensors, heaters, interface materials and control loops before committing them to hardware. Once the schematics and thermal stack-up are frozen, you’ll drive the board spins, source parts, assemble the prototypes and bring them up in the ...

I need assistance connecting my Yeastar TA810 SIP adapter to UNIFI Talk via my Dream Machine Pro. This will enable me to make and receive calls using my analog POTS phone lines. Requirements: - Configure Yeastar TA810 with UNIFI Talk - Integrate with Dream Machine Pro - Ensure functionality for incoming and outgoing calls Ideal Skills and Experience: - Experience with Yeastar and UNIFI Talk - Strong knowledge of network configurations with Dream Machine Pro - Familiarity with POTS and SIP integration Please ensure all connections are secure and provide a brief setup guide.

...MOSFETs total - 10 A target continuous current per motor after thermal validation - 20 A for up to 1 second and 30 A start/stall peak for up to 100 ms - Independent 20 kHz PWM, forward, reverse, coast, and active brake - Independent bidirectional current measurement and fast hardware overcurrent shutdown - CAN FD with Classic CAN compatibility and LIN 2.x - USB-C service interface - Three protected analog inputs for buttons connected to GND - Two optional Hall-sensor inputs with protected 5 V supply - Battery-voltage measurement and two power-stage temperature sensors - Reverse-battery and automotive transient protection - Low-power sleep and wake hardware FIXED MAIN COMPONENTS - STM32G0B1CBT6 MCU - Infineon TLE9562-3QXJ automotive motor SBC - 8 x IAUC120N04S6N013 automotive MOS...

...protected 0-10 V analog inputs - CAN/TWAI communications - Electronically controlled 120-ohm CAN termination - USB-C service/programming interface - Support for up to 4 identical TRB-4CH-W modules on the CAN network, providing 4, 8, 12 or 16 relay channels ELECTRICAL DESIGN REQUIREMENTS The engineer will be responsible for designing and selecting the appropriate components for: - ESP32-S3-WROOM-1U integration - 12 VDC input power circuitry - Voltage regulation for the ESP32-S3 and low-voltage electronics - Reverse-polarity protection - Input overcurrent protection - Appropriate transient/surge protection - Appropriate ESD protection - Power filtering and decoupling - 4 relay driver circuits - Relay coil suppression - 4 protected 12 VDC digital input circuits - 2 protected 0-10...

...signal integrity, power stability, and component lifecycle (active MPNs only on DigiKey/Mouser/LCSC; no NRND/EOL). • Power Architecture: Optimize power sequencing across e-Fuse, dual buck converters (12V to 5V & 3.3V), and LDOs to eliminate ESP32 back-powering. 2. Peripheral & Circuit Integration: • Audio Subsystem: Integrate WM8960 audio codec (2x Class-D BTL speaker outputs + 2x differential analog MIC connectors). Resolve ESP32-S3 GPIO mapping conflicts with bootstrapping/flash pins. • Protected JST Connectors: - 1x Illuminated ON/OFF Switch (N-Channel low-side MOSFET + RC debounce + TVS). - 4x Dry-Contact Sensor ports (2-Pin JST with 10k/100nF RC debounce + bidirectional TVS). - 2x Active Sensor ports (3-Pin JST with PTC Polyfuse + 100nF decoupling + TV...

...web/app interface, regardless of sensor state Remote configuration, monitoring, and operation of all connected devices through a secure cloud/server platform Sensor and communication interfaces: Modbus RTU/RS485 input ports for field sensors — pressure sensors, level transmitters, flow meters, temperature sensors Modbus output interface for integration with BMS/SCADA systems At least one 4–20 mA analog input channel for industrial-grade sensors/transmitters LoRa wireless receiver module (865–868 MHz band) for long-range, low-power communication with wireless sensors Built-in IoT SIM-based GSM/4G module for cloud connectivity, real-time data transmission, remote diagnostics, firmware updates, and alarm notifications Relay/output requirements: Multiple relay outpu...

I’m modeling a VLSI circuit’s behaviour entirely through simulation and want to drive the process with an XGBoost Multi-Output Regressor. The goal is to replace portions of a traditional SPICE run with a machine-learning proxy that can predict multiple analog metrics at once (delay, power, noise, etc.) from layout-level or netlist-level features. Key details • Scope: pure simulation workflow; no verification or post-layout optimisation tasks are needed. • Model choice: XGBoost Multi-Output Regressor is fixed. • Critical tweak: I need a custom number of estimators rather than the default setting; help me decide and implement the optimal value through systematic tuning. What I expect from you 1. Clean, reproducible Python (preferably a Jupyter No...

...signal integrity, power stability, and component lifecycle (active MPNs only on DigiKey/Mouser/LCSC; no NRND/EOL). • Power Architecture: Optimize power sequencing across e-Fuse, dual buck converters (12V to 5V & 3.3V), and LDOs to eliminate ESP32 back-powering. 2. Peripheral & Circuit Integration: • Audio Subsystem: Integrate WM8960 audio codec (2x Class-D BTL speaker outputs + 2x differential analog MIC connectors). Resolve ESP32-S3 GPIO mapping conflicts with bootstrapping/flash pins. • Protected JST Connectors: - 1x Illuminated ON/OFF Switch (N-Channel low-side MOSFET + RC debounce + TVS). - 4x Dry-Contact Sensor ports (2-Pin JST with 10k/100nF RC debounce + bidirectional TVS). - 2x Active Sensor ports (3-Pin JST with PTC Polyfuse...

...signal integrity, power stability, and component lifecycle (active MPNs only on DigiKey/Mouser/LCSC; no NRND/EOL). • Power Architecture: Optimize power sequencing across e-Fuse, dual buck converters (12V to 5V & 3.3V), and LDOs to eliminate ESP32 back-powering. 2. Peripheral & Circuit Integration: • Audio Subsystem: Integrate WM8960 audio codec (2x Class-D BTL speaker outputs + 2x differential analog MIC connectors). Resolve ESP32-S3 GPIO mapping conflicts with bootstrapping/flash pins. • Protected JST Connectors: - 1x Illuminated ON/OFF Switch (N-Channel low-side MOSFET + RC debounce + TVS). - 4x Dry-Contact Sensor ports (2-Pin JST with 10k/100nF RC debounce + bidirectional TVS). - 2x Active Sensor ports (3-Pin JST with PTC Polyfuse + 100nF decoupling + TV...

...superheterodyne; * low-IF; * direct conversion; * RF transceiver configured for receive operation; * equivalent solution. The selected solution shall prioritize: * sensitivity; * selectivity; * frequency stability; * component availability; * manufacturing repeatability; * long-term availability. The receiver should preferably provide **RSSI (Received Signal Strength Indicator)** through an analog or digital interface. --- ## 4. BASEBAND REQUIREMENTS The NFM demodulated output shall preserve the AFSK frequencies used by SAME: **MARK: 2083.3 Hz** **SPACE: 1562.5 Hz** **Nominal data rate: 520.83 bit/s** The baseband signal shall not be excessively modified by audio processing, filtering, deemphasis, AGC, or other functions that could affect reliable data recovery. A test p...

I need a fresh, contemporary watch created from the ground up that will look just as good on a man’s wrist as it does on a woman’s. I’m open on movement and display style—analog, digital, or a clever hybrid—so long as the final concept feels balanced, stylish, and genuinely unisex. Time is critical; I’d like to move immediately from briefing to first concepts, with a complete package ready for hand-off as quickly as we can manage without cutting corners on quality. To keep things clear, here’s exactly what I’ll need from you: • 2–3 concept directions with mood boards or sketches • A finalized design in high-resolution renders (front, side, back, and on-wrist views) • Production-ready CAD files and dimensiona...

I want a LabVIEW-based curve tracer that mirrors the behaviour of the Digilent WaveForms instrument but runs entirely inside LabVIEW while talking to my Analog Discovery 2. The program must sweep a user-defined voltage across a device, sample the resulting current and voltage, and plot the I-V curve in real time. Primary test focus is on resistors, yet it should also cope with simple LED measurements so the code isn’t locked to a single device type. Please make the sweep limits and step size configurable so I can adapt quickly to different resistor values or LED forward voltages. The interface needs to feel as quick and informative as WaveForms, with one extra twist: I need reliable data-export options (CSV at a minimum) straight from the GUI so I can toss results into E...

I'm seeking an experienced PCB designer to create a complex, multi-layer schematic for an industrial radio. The schematic will incorporate analog, digital, and mixed-signal components. Key requirements: - Design complex, multi-layer PCB schematics - Incorporate analog, digital, and mixed-signal components - Experience with industrial equipment is a plus - Proficiency in PCB design software (e.g., Altium, Eagle) Ideal candidates will have a strong background in electronics and a proven track record in similar projects. Please provide samples of previous work.

...containing: * Reference designator * Part number * Value * Package * Quantity * Recommended manufacturer ### 10. Optional PCB Design If you can also provide a PCB design, please mention this separately in your proposal. The PCB should be suitable for the actual components selected and the **9 V / 1.5 A** input path. ## Freelancer Requirements Please apply only if you have experience with: * Analog electronics * Voltage comparators * Hysteresis circuits * MOSFET power switching * Li-ion battery charging * DC power-path design * TP5100 or similar Li-ion charger ICs I am particularly interested in someone who can explain **why the circuit works**, rather than simply providing a schematic. ## Proposal Requirements Please include: 1. Your relevant electronics design experie...

I need a complete schematic for an analog circuit that will be used in a signal-processing application. My focus right now is solely on the schematic stage—no board layout or routing is required at this point. You will start from a functional description that I will provide (target bandwidth, expected input/output levels, and available supply rails) and turn it into a clean, well-documented schematic that can later be handed off for PCB layout. Proper component selection, clear annotation, and ready-to-simulate design files are essential. Please work in a mainstream CAD tool such as Altium Designer, KiCad, or OrCAD—let me know which one you prefer so I can confirm compatibility. The final hand-over should include: • The editable source file in the chosen CAD...

I need a seaso...materials, including alternative parts in case of supply issues. • Assembly and test procedures so I can replicate your bench results and move to pilot production. • Ongoing guidance while I build and debug the first hardware sample. If firmware or digital control is the best way to meet the spec, include concise, well-commented code and in-circuit programming instructions; otherwise a purely analog approach is fine. Safety standards for industrial environments—as well as sensible thermal management, short-circuit protection and over-voltage shutdown—must be baked in from the start. Please tell me about similar power-electronics projects you have completed and let me know which design tools you prefer. I’m ready to kick off as soon ...

...sensitive analog ADC bias circuit and RF lines. • Form Factor: [60X100mm or "As compact as reasonably possible"]. Deliverables Required: 1. Complete Schematic files. 2. Complete PCB Layout files. 3. Standard Gerber files (ready for fabrication at standard houses like JLCPCB or PCBWay). 4. Bill of Materials (BOM) with common, easy-to-source generic parts (preferably LCSC part numbers). 5. Pick & Place (CPL) files for PCBA. Ideal Freelancer Qualifications: • Proven experience designing custom PCBs for the ESP8266/ESP32 ecosystem. • Deep understanding of ESP8266 boot-strapping pins, auto-reset circuitry, and GPIO states. • Experience with Battery Management Systems (BMS) and seamless power path switching architectures. • Experience with RF layo...

...programming header 512 Mbit / 64 MB QSPI NOR flash for data logging SPI EEPROM for settings, serial number and calibration data Automotive 6-axis IMU Vehicle-voltage and MCU-temperature monitoring Inputs The board will include protected automotive inputs such as: 12 V ignition/wake input 12 V brake input Ground-switched handbrake input 0–5 V throttle input 0–5 V pressure or boost input Multipurpose analog input One or two multipurpose vehicle-speed inputs Hall, open-collector, VSS and suitable ABS-type sensor support Two spare 12 V-rated inputs Software-selectable pull-up and pull-down where practical Protected 5 V sensor supply and dedicated sensor ground Outputs At least six protected outputs are required, including: Protected 12 V high-side brake output Protect...

ECU Tester Dashboard Prototype (USD 500 / 40 Days): Develop a Qt6/QML+C++ dashboard for Raspberry Pi Zero 2 W and ESP32-S3 firmware with binary UART communication. Includes simulated dashboard, ESP32 integration, analog/digital signals (RPM, sensors, coils, injectors, waveforms), GPIO/ADC expansion, documentation, auto-start, testing, and full source code. 3 milestones: UI simulation, firmware integration, deployment. Excludes PCB design, CAN decoding, and new features.

Schematic Revision & PCB Design for Industrial Embedded Product (EasyEDA) I am looking for an experienced hardware design engineer with proven expertise in industrial electronics, particularly products involving mixed-signal design, digital and analog isolation, and isolated power supplies. This project is for an industrial product. The schematic has already been completed in EasyEDA. I require modifications to the existing design before proceeding to PCB layout. Phase 1 – Schematic Revision The selected person will: * Review the existing EasyEDA schematic. * Replace selected components with alternate components (including footprint changes). * Add a new LCD module with a 7-pin connector (SPI/I²C interface). * Update symbols, footprints, and libraries as required...

We are offering a short-term contract for a qualified Optics Engineer to assist us in the development of a new consumer-grade electro-optical device. The qualified candidate will have an advanced engineering background and at least 5 years of experience working with: Visible and IR spectrum lasers; Class 3R & 3B Advanced analog light transmission mechanics & materials Advanced optical lens assemblies A/D/A methodology in photo-optics SolidWorks or Similar Candidate must be up to date on the most advanced materials and methodologies in optics devices. Some experience with GaAs Photocathodes and GEN2+ Intensifier tubes is a plus. This will be a results-based, indefinite delivery contract with NDA, and the best candidate can expect compensation between $35,000 - $6...

Title: Book Marketing & Reviewer Outreach Assistant for Indie Horror Novel Description: I’m an independent author seeking a part-time marketing assistant for my recently released supernatural/analog-horror novel, Hollowmarch. The initial work will include: * Researching active horror reviewers, Bookstagram, BookTok, blogs, newsletters, and written-interview opportunities * Confirming that prospective contacts accept indie books * Checking public AI-content policies before outreach * Preparing personalized email pitches from an approved template * Maintaining a spreadsheet of contacts, responses, follow-ups, and review-copy requests * Identifying promotional opportunities that do not require live speaking or appearing on camera * Optionally scheduling approved Instagram...

...Design Rule Check (DRC) and Electrical Rule Check (ERC). Generate production-ready files, including: Gerber files *BOM (Bill of Materials) *Pick-and-Place files *Assembly drawings *Support prototype manufacturing and debugging. *Recommend improvements for cost, reliability, and manufacturability. Required Skills >Experience with KiCad, Altium Designer, or Autodesk Eagle. >Strong understanding of analog and digital circuit design. >Knowledge of power management, USB, Bluetooth/Wi-Fi modules (if applicable), and microcontrollers. >Experience designing PCBs for mass production. >Familiarity with EMI/EMC and signal integrity best practices. Preferred Experience Consumer electronics. IoT or smart devices. Battery-powered products. Previous products successfully ta...