Circuit design jobs

My almost-finished ATMS board in Altium Designer still has its 5 V rail and ground net incompletely routed. I need a fellow Altium specialist to open the existing project, tidy up those power connections, run the usual design-rule and connectivity checks, and return the updated Altium files. No other parts of the circuit require attention, and I don’t need change logs or screenshots—just a clean, error-free design file that passes the basic rule checks. Deliverable • The original project folder updated with correctly routed 5 V and GND nets and no DRC errors related to those nets.

...electrical installation design in PowerCAD-5 for a small residential property (2-bedroom house/apartment in Victoria). Scope of Work: Build the complete electrical installation in PowerCAD-5 (.QPJ file) Create load schedule following AS/NZS 3000 Table C1 Calculate Maximum Demand Size main supply cable and main protection device Design and verify all sub-circuits (lighting, power points, oven, hot water, A/C, etc.) Cable sizing & voltage drop verification per AS/NZS 3008.1 Select appropriate protection devices (NHP/Schneider or equivalent) Protection coordination check in PowerCAD-5 Earthing conductor sizing (main earth + circuit earths) Clean Single Line Diagram Deliverables: Final native PowerCAD-5 (.QPJ) file Exported PDF of the Single Line Diagram Brief ...

The concept is already mapped out on paper; now it needs to become a functional mixed prototype that blends physical components with companion software. I will share diagrams and use-case notes that spell out the user journey, required interactions, and performance targets. Hardware scope – Translate my schematics into a breadboard or printed-circuit proof-of-concept. – Select and integrate the most appropriate sensors, microcontrollers, and actuators (open to your recommendations on exact parts). – Provide wiring diagrams and a concise bill of materials so the build can be reproduced. Software scope – Create the firmware or embedded code needed to run the hardware. – Build a lightweight application layer—this may cover data proces...

I'm looking for a 2D animator to animate my logo for my website. The animation should have a tech, futurepunk style. Duration of animation 1-3 seconds and then go into a loop Key Requirements: - 2D Animation: The final product ...Duration of animation 1-3 seconds and then go into a loop Key Requirements: - 2D Animation: The final product should be in 2D animation. - Tech Style: The animation should have a tech, futurepunk aesthetic. - Animation Effects: Incorporate elements like glitches, distortions, and digital circuit patterns. The overall look should be minimalistic and blend seamlessly with my current logo style. Ideal Skills and Experience: - Proficiency in 2D animation software. - Experience with tech-style and futurepunk design. - Ability to create seamless, m...

Our infrastructure is ready for a major uplift: I am replacing a flat WatchGuard/Ubiquiti environment with a full Cisco Meraki hub-and-spoke SD-WAN. The topology is straightforward—one headquarters that will act as the primary hub, a DR site that will serve as a secondary hub, and four branch offices that will connect as spokes. Here is what I need from you: • Design a Meraki architecture that introduces proper VLAN segmentation, Auto-VPN, traffic shaping, and advanced security while mapping cleanly to the existing IP ranges. • Produce a configuration set for MX security appliances, MS access/distribution switches, and any required SFP or PoE considerations so the cut-over is as close to “plug and play” as possible. • Create and document a ...

...Temperature-dependent material properties Validation of ampacity limits5. Weld Zone Simulation Purpose: Evaluate joining quality Thermal profile during laser welding Heat-affected zone (HAZ) estimation Residual stress after welding Weld penetration depth analysis Important for single-side welding validation 6. Thermal Runaway / Fault Condition Simulation Purpose: Safety assessment High-current short-circuit simulation Fuse behavior of narrow clad sections Peak temperature prediction Time-to-failure analysis...

Summit Adventures Style: Geometric / Outdoor Visuals...lavender background. Golden Roast Coffee Roasters Style: Badge / Vintage Visuals: A circular gold/brown stamp badge with "EST. 2024" on a warm cream background. Bloom Organics Style: Nature / Organic Visuals: Overlapping green heart and leaf shapes forming a plant on a pale green background. Nexus Technology Style: Tech / Dark Mode Visuals: A purple hexagon containing a bar chart, styled with circuit nodes on a dark navy background. Lumière Jewellery Style: Luxury / Elegant Visuals: A gold diamond shape with a minimalist cross section on a dark charcoal background. Isolated Bottom Center Chat Hub Style: Playful / Bold (App / Communication Style) Visuals: An orange speech bubble containing three white dots o...

...project. The ideal candidate will have a strong portfolio demonstrating expertise in residential lighting design. Collaboration with our creative team is essential to ensure that the lighting enhances the space's overall aesthetic and functionality. If you have a passion for lighting design and are ready to bring your creative vision to life, we would love to hear from you! Required: Lighting design for a two-floor residential villa with a very small annex (total approx.: 660m2) + façades using DIALux evo, latest version. *Note : the ground floor lighting design is 70% complete You will be provided with : 1- Required Lux levels for spaces 2- List of fixtures to use in your design and their CAD symbols 3- CAD Drawing for the villa 4- St...

...criteria – PSIM model shows stable operation across the load range I will provide. – Proteus file compiles without errors on my end. – LabVIEW interface runs on version 2021 and logs data at 1 s intervals. 2. Mechanical, drafting, and promo material • Translate the final board outline into clean AutoCAD 2D drawings and a 3D layout so my fabricator can prepare the enclosure. • Design a single-page flyer that highlights the product’s technical advantages; print-ready at 300 dpi, A4 size, source file included. I will supply the functional block diagram, component list, and brand guidelines after kickoff. All source files—PSIM, Proteus, LabVIEW, DWG, and the flyer’s editable file—must be handed over so I c...

Design a early proof-of-concept compact wearable electronics system suitable for PCB manufacturing and assembly. I am developing an early-stage wearable prototype that detects and communicates nervous system activation and am looking for an experienced electronics engineer to design a compact wrist-wearable PCB prototype. This is a proof-of-concept prototype, not a regulated medical device. The device will: • collect physiological sensor data • detect stress-related changes • provide simple feedback to the wearer The prototype is currently based on an ESP32 platform, though alternative low-power microcontrollers may be suggested if appropriate. ________________________________________ Scope Design and prototype a compact wearable electronics system ...

I'm looking for a 2D animator to animate my logo for my website. The animation should have a tech, futurepunk style. Duration of animation 1-3 seconds and then go into a loop Key Requirements: - 2D Animation: The final product ...Duration of animation 1-3 seconds and then go into a loop Key Requirements: - 2D Animation: The final product should be in 2D animation. - Tech Style: The animation should have a tech, futurepunk aesthetic. - Animation Effects: Incorporate elements like glitches, distortions, and digital circuit patterns. The overall look should be minimalistic and blend seamlessly with my current logo style. Ideal Skills and Experience: - Proficiency in 2D animation software. - Experience with tech-style and futurepunk design. - Ability to create seamless, m...

...protection and control design for substations using the 1.5 circuit breaker (breaker-and-a-half) scheme, including breaker failure logic and current summation for line protection Strong background in US utility P&C standards (IEEE C37 series, NERC PRC standards, IEEE 1818, IEEE 484) Engagement: Approximately 10 to 15 hours per week Duration: 8 weeks Remote, with scheduled review sessions Scope of engagement: The role is advisory and reviewing, not full execution. Our team is producing the secondary design covering protection and control, AC/DC auxiliary systems, SCADA and communications. We need a PE to guide and review: Protection philosophy and relay scheme selection (line, bus, transformer, breaker failure) P&C panel layouts, schematics, and wiring diagra...

...equipment for substations using the 1.5 circuit breaker (breaker-and-a-half) scheme Strong background in North American utility standards (ANSI/IEEE, NESC) Engagement: Approximately 10 to 15 hours per week Duration: 8 weeks Remote, with scheduled review sessions Scope of engagement: The role is advisory and reviewing, not full execution. Our team is producing the design in Primtech 3D, covering the full yard layout, primary equipment selection, bus work, equipment rating checks, grounding, cable routing, and clearances. We need a PE to: Guide key design decisions on primary equipment selection and arrangement Review deliverables (3D model, GA drawings, BOMs, single-lines, fabrication details, design report) against US utility expectations Validate that the ...

I'm looking for a 2D animator to animate my logo for my website. The animation should have a tech, futurepunk style. Duration of animation 1-3 seconds and then go into a loop Key Requirements: - 2D Animation: The final product ...Duration of animation 1-3 seconds and then go into a loop Key Requirements: - 2D Animation: The final product should be in 2D animation. - Tech Style: The animation should have a tech, futurepunk aesthetic. - Animation Effects: Incorporate elements like glitches, distortions, and digital circuit patterns. The overall look should be minimalistic and blend seamlessly with my current logo style. Ideal Skills and Experience: - Proficiency in 2D animation software. - Experience with tech-style and futurepunk design. - Ability to create seamless, m...

I need a 3D-printed sliding lid for our water delivery truck with a horizontal poly tank. The existing lid is 16 inches in diameter. The the purpose is to have an electric sliding door so we can fill the tank f...delivery truck with a horizontal poly tank. The existing lid is 16 inches in diameter. The the purpose is to have an electric sliding door so we can fill the tank from the top without climbing a ladder. It should be made of PETG and have the following features: - Weather resistant - Functional for constant use daily - Able to seal and prevent water leakage - Motorized movement on a 12 volt circuit Ideal skills and experience: - Proficiency in 3D modeling and printing with PETG - Experience in designing weather-resistant and water-tight mechanisms - Knowledge of electri...

...technical, correctly formatted, and free of plagiarism. Equations must be shown step-by-step, units kept consistent (SI), and uncertainties briefly addressed. A few neat, hand-style drawings or digital sketches (e.g., circuit diagram, graph axes with plotted points, and a schematic highlighting EMF and r) are required; they can be inserted as images or drawn in vector software—whichever is easiest as long as they look like genuine student work. Please structure the report in the familiar lab format: • Title page • Aim and hypothesis • Apparatus list and labelled circuit diagram • Method written in past tense, third person • Processed results with tables and a clearly labelled graph (V versus I) • Calculations showing gradient...

I need a compact plastic enclosure for a small printed-circuit board modelled so it can be over-moulded straight off an injection-mould tool. The design must arrive in a clean, watertight STEP file because that is the format my tooling house requests. Please keep standard wall-thickness, draft angles and snap-fit details in mind so we avoid costly rework once the mould is cut. Internal standoffs will have to match the PCB outline I will supply, and the external surface should be ready for a soft-touch TPE over-mould that wraps around the rigid ABS base. Deliverables I expect: • Finished enclosure in native CAD and exported STEP • Separate STEP files for each mold half • Any notes you feel a mould-maker would need before cutting steel ‑ gate location, pa...

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I need assistance repurposing a 3-phase #2 circuit from a roof package unit to a small 3-phase sub panel that will feed two smaller HVAC systems. Requirements: - Sub panel to be fed by existing 3-phase circuit - Must be configured in wye - Systems operate at 208V Deliverables: - Detailed line drawing for planning - Ensure compliance with electrical codes Ideal Skills & Experience: - Electrical engineering background - Experience with 3-phase systems - Proficiency in creating technical schematics

I run a local limousine company and I’m ready to step beyond the results I’ve had so far. I’ve already invested in online advertising, worked the networking-event circuit, and set up a referral program, yet I know we can capture a much larger share of our market. The primary focus is the immediate local area; I want more bookings from corporate clients, private-event organizers, and tourists who prefer a premium ride. If you have a proven way to turn those segments into steady, high-value accounts, let’s map out and launch it. Here’s what I’m expecting: • A clear, data-driven client-acquisition plan tailored to my city and these three segments. • Implementation or hands-on guidance for campaigns, partnerships, or outreach that ...

I have a fresh project that calls for complete load-distribution schematics as well as the matching general-arrangement drawings. Nothing exists yet, so the task begins at ground zero: interpreting my notes and single-line diagrams, then producing full multi-sheet construction drawings in AutoCAD. Key points you’ll need to accommodate: • The drawings must show every circuit breaker position and rating, with clear tagging that aligns to my panel schedules. • The system ties into an Eltek industrial battery-charger suite, so you will also draft charger and battery-string schematics that respect Eltek’s latest wiring conventions and terminal layouts. • All documents must be coordinated—panel GA, wiring, and charger sheets must cross-reference con...

...fundamental "Lock-Claim-Refund" PoW state machine. The Challenge: Deliver functional Mock Tokens and a verified HTLC within 48 hours. Audit: Provide a Refund Transaction Hash (Lock -> Timeout -> Refund) proven on-chain. Verification: All contracts verified (Green Checkmark) on explorer.bitnetmoney.com. PHASE 2: ZK-Circuit & Verifier Integration ($150) Goal: Integrate the zero-knowledge privacy layer (inspired by Polygon's recursion/verification logic). Deliverables: .circom circuit + BN254 Solidity Verifier. Logic: Prove knowledge of secret without revealing preimage. Implement Nullifiers. Setup: Conduct Phase 2 Trusted Setup contribution for .zkey parameters. PHASE 3: Sovereign React DApp & Publication ($200) Goal: Validate proof gen...

...am looking for a professional review to suggest and implement improvements for robustness, EMI reduction, and overall reliability. Hardware Specifications: -MCU: Socket headers for ESP32 DevKit V1 (30-pin). -Motor Driver: Integrated L298N logic (or equivalent H-Bridge) to drive two DC Motors. -Power Supply: Input from 2x 18650 batteries (~8.4V). -DC/DC step down (3A): Integrated Buck Converter circuit (use LM2596 module or better) to provide a stable 5V rail. Connector Requirements: -Servos (2x): 3-pin male headers (2.54mm pitch) for SG90 connection (Signal, VCC, GND). -TFT Display (2.4" SPI): 8-pin JST-XH connector. -DC Motors (2x): 2-pin screw terminals (Bornes) for each motor output. -Battery Input: 1x 2-pin screw terminal (Borne). Technical Requirements & Delivera...

I need a compact custom PCB designed for an embedded UAV safety subsystem. The board should integrate sensing, control, power management, battery charging, status indication, buzzer alert, and PWM-based servo actuation into a single 2-layer PCB. The design should be based on an ESP32-WROOM module, not an ESP32 development board. The onboard sensor should be the MPU6050 IMU, as the existing firmware and ML model are built around this sensor. The board should also include a servo output for parachute deployment, a loud buzzer, a main power switch, battery input, onboard single-cell Li-ion/LiPo charging and protection, USB Type-C programming/debugging, and required LEDs. Maximum board size: 80 mm × 80 mm. The board should be kept as compact as realistically possible while prese...

Project Title: Logo Design for EdTech Brand – KodeYoda About the brand: KodeYoda is an edtech platform for children focused on coding, logical thinking, and brain development through tools like Scratch and Micro:bit. The brand should feel smart, premium, fun, and trustworthy for parents, while still exciting for kids. Logo concept: I want a small samurai mascot/icon integrated into the logo. Important style direction: Cute and intelligent (not aggressive) Minimal and modern Premium feel Friendly for kids (ages ~6–14) Could include subtle coding/tech elements (pixel, circuit lines, code brackets, digital eyes, etc.) Samurai should symbolize discipline, wisdom, and mastery Must be original (not similar to Yoda, Star Wars, anime, or existing characters) A tiny samur...

...fundamental "Lock-Claim-Refund" PoW state machine. The Challenge: Deliver functional Mock Tokens and a verified HTLC within 48 hours. Audit: Provide a Refund Transaction Hash (Lock -> Timeout -> Refund) proven on-chain. Verification: All contracts verified (Green Checkmark) on explorer.bitnetmoney.com. PHASE 2: ZK-Circuit & Verifier Integration ($150) Goal: Integrate the zero-knowledge privacy layer (inspired by Polygon's recursion/verification logic). Deliverables: .circom circuit + BN254 Solidity Verifier. Logic: Prove knowledge of secret without revealing preimage. Implement Nullifiers. Setup: Conduct Phase 2 Trusted Setup contribution for .zkey parameters. PHASE 3: Sovereign React DApp & Publication ($200) Goal: Validate proof gen...

...plumbing pipelines. PCB Requirements: - Compact rectangular PCB - Target size: 40mm x 40mm - Compact SMD design preferred - Suitable for portable enclosure integration Main Features Required: 1. Rechargeable Battery System - Support rechargeable lithium battery pack - Charging input circuit included 2. LED Indicators - Low battery indicator LED - Charging indicator LED - Full battery indicator LED 3. Power / Pulse Status LED - Second LED for ON/OFF indication - LED should blink during pulse operation 4. Pulse Modes - 3 selectable pulse modes: - Low - Standard - Fast 5. Solenoid Valve Control - 12V DC solenoid valve output - Stable pulse generation - Suitable driver circuit for inductive load 6. Future Expansion Capability Please include standby pads/he...

...systems engineer to design, simulate, and build a working prototype of a Permanent Magnet DC (PMDC) motor driver circuit. The driver must allow precise control over the number of motor rotations using real-time feedback from a proximity sensor. This is a two-phase project: (1) schematic and PCB design, and (2) hardware prototype build and validation. Both phases are in scope. TECHNICAL REQUIREMENTS Motor Driver: - H-bridge or equivalent topology to drive a PMDC motor - Bidirectional rotation support - PWM-based speed control - Adjustable current limiting - Protection against over-current and back-EMF Proximity Sensor Feedback: - Interface with an inductive or optical proximity sensor to count motor shaft rotations - Debounce logic required - Sensor signal condit...

...work • Finalise the overall AutoCAD floor plan, tidying line weights, annotations, doors, windows, and furniture blocks so everything plots cleanly at 1 : 50. • Produce a reflected ceiling plan that shows lighting fixtures, HVAC grilles (if required), ceiling heights, and key notes. • Draft dedicated sheets for sanitation / plumbing and for electrical, each on its own layer set with legends, circuit runs, pipe diameters, and fitting tags. • Generate two building sections (positions will be marked in the base file) with floor-to-ceiling dimensions, structural members, finishes, and elevation call-outs. File organisation must remain layer-based and metric; model space only—no paperspace sheets are necessary. Please keep all new elements parametric o...

...showing the SR04 connection, and a short description of how the obstacle flag is used elsewhere in the program. Apart from adding the SR04 driver (timer-based pulse width measurement, timeout handling, and simple moving-average smoothing is fine), the only logic change I am after is the distance-based threshold test—no machine learning or pattern recognition. For any hardware interface part new circuit you can give me schematic and i can do same on general PCB for testing. Beside this i want to allow support of RFID reader on Serial port or on TCP-IP as current flow only support wigand interface. Deliverables • Updated, well-commented source files • Compiled HEX ready to flash • Brief report outlining the new functions, registers or timers you touc...

I need my existing logo manually recreated as a true vector. This file will be used by a commercial printer to create a Spot UV mask, so absolute mathematical precision is required. Strict Technical Requirements: No Auto-Trace: Replicate the icon (hex nut and circuit nodes) manually using the pen tool. Typography: Do NOT hand-trace the text. Please recreate the typography using a matching heavy geometric font (e.g., Chakra Petch, Michroma, or similar) and convert the final text to outlines/curves. Clean Geometry: Because this is for Spot UV, all vector shapes must be flat, merged, and non-overlapping. No clipping masks, hidden layers, or raster effects. Colors: Preserve the exact Hex color values visible in the source artwork, set against a transparent backgroun...

I need someone familiar with the Accomack County, Virginia Clerk of Circuit Court land-records system to track down the foundational paperwork for one subdivision’s homeowners association. My board must cite the original Declarant, list the exact recording reference for the HOA Declaration, and attach a legible copy when we file our annual state report, but that information is missing from our files. Here’s what the job involves: • Search the county grantor/grantee index (and, if necessary, the plat cabinet or deed books) until you locate the recorded Declaration that created the HOA. • Confirm and transcribe the name of the Declarant exactly as it appears on the instrument. • Note the complete recording reference—book and page or instrument num...

...hardware circuit design and the Arduino firmware, from prototype to a working demo unit. Core deliverables Working hardware prototype using Arduino (Uno/Mega/Nano) with CT sensor or ACS712 current sensor and ZMPT101B voltage sensor Firmware that measures voltage (V), current (A), real power (W), and energy consumed (kWh) at defined intervals Wireless data transmission via ESP8266 / ESP32 WiFi module to a REST API endpoint (JSON payload over HTTPS) Full schematic / circuit diagram and commented source code (C/C++ Arduino IDE) submitted with the build Brief technical documentation covering calibration steps, known limitations, and expansion notes Skills required Arduino (C/C++) Electrical circuit design ESP8266 / ESP32 WiFi IoT sensor integration REST ...

...Configure and modify open-source freETarget software Design hardware wiring and sensor connections Perform calibration and accuracy testing Create a user-friendly interface/dashboard Troubleshoot hardware and software issues Assist in prototype development and deployment Required Skills Experience with Arduino or ESP32 development Knowledge of embedded systems and electronics Understanding of sensors and signal processing C/C++, Python, or embedded programming knowledge Basic PCB/circuit understanding Experience with GitHub/open-source projects Problem-solving and debugging skills Preferred Skills Experience in IoT projects Knowledge of shooting sports/electronic scoring systems Mobile app or web dashboard development CAD/3D design experience PCB design knowl...

...fully automated water-pumping system and need both an analog control circuit and a PLC program that work seamlessly together. Scope • Sensing: the design must integrate pressure sensors and level sensors for real-time feedback. • Control targets: the core logic will start/stop pumps and trigger alarms; any additional loads you think would improve reliability can be suggested but are not mandatory. • PLC logic style: I want the software written in a Function Block Diagram format so that future maintenance is straightforward. • Analog backup: alongside the PLC, provide a discrete analog circuit that can keep the pumps running safely if the controller is offline. Deliverables 1. Annotated schematic of the analog circuit, includi...

The indo...need a technician who can: • Mount the indoor unit securely on the existing bracket and seal around the pre-cut hole • Position and anchor the outdoor condenser, observing manufacturer-specified clearances • Run refrigerant lines, drain hose, and power cabling through the prepared passage, then pressure-test, vacuum, and charge the system correctly • Connect to the dedicated electrical circuit, verify proper grounding, and tidy up any conduit or trunking • Power up, test all modes, and walk me through basic operation Please bring the gauges, vacuum pump, flare tools, torque wrenches, and any consumables (insulation, tape, brackets) needed to finish in one visit. The job is complete when the unit cools efficiently, shows no leaks, and the...

...of the board’s DXF profile.) • The sensor output must be connected to the microcontroller’s interrupt-enabled GPIO pin. • Since the system can measure up to 150,000 RPM, interrupt-based reading will be used. • Additionally, for the external Hall sensor connection: o The circuit will be pre-configured on the board o The sensor will not be present on the board o A 3-wire connection (VCC / GND / Signal) will be provided. 6. Thermocouple Temperature Measurement • The board must include an embedded thermocouple reading circuit. • The measurement range must be suitable for temperatures from room temperature up to approximately 1500°C. • A digital thermocouple reader or a suitable analog solution may be used. • The thermocouple ...

Engineer for IoT Sensor PCB Design, DFM Review and Production Support. We are looking for an experienced electronics engineer / PCB designer to work with us on the development and production readiness of a small family of IoT sensor boards. The project is not just a one-off PCB task. We are looking for someone who can collaborate closely with our internal team, review existing board designs, improve them where needed, prepare them for manufacturing, and support the transition from prototype to small-batch production. The first task will be to review and refine an existing compact environmental sensor PCB. After that, we expect to work on approximately 4 to 5 additional sensor boards with similar requirements. The boards are small, low-voltage, sensor-oriented PCBs for IoT applica...

I have a Snap-On MT-1665 oscilloscope that the keypad is not working. I found a Company that can make one but I need an exact high tolerance file made. I need to have the physical one I have created into a file for membrane keypad will serve as the main control panel on an industrial m...part and requirements from the manufacturer. Here is what I’m expecting from you: • A schematic and PCB (or flexible-PCB) layout ready for fabrication, created in KiCad, Altium, Eagle or a comparable CAD tool. • Pin-out and connector recommendations so my in-house team can cable it straight to our control PCB. Once I receive the manufacturing files and documentation, I’ll run a quick design review. If everything matches the requirements above and passes DRC, the proj...

...support our ongoing hardware development projects. The ideal candidate should have strong expertise in schematic design, PCB layout, component selection, and manufacturing-ready file generation. ### Requirements: * Experience in multi-layer PCB design * Strong knowledge of analog and digital circuit design * Ability to create schematics, PCB layouts, and Gerber files * Experience with high-speed signals, power management, and EMI/EMC considerations * Knowledge of BOM preparation and component sourcing support * Familiarity with PCB design tools such as Altium Designer, KiCad, Eagle, or OrCAD * Ability to coordinate with PCB manufacturers and assembly vendors * Understanding of DFM (Design for Manufacturing) guidelines ### Deliverables: * Sch...

...preferably through USB if practical - Audio output should go to headphone wires using solder pads or through-holes - No headphone jack required - LED output/control for LED headphones - Bluetooth playback from phone is optional if it can be included without making the design too expensive or too large The PCB should include: - Music player/audio decoder chip or module - 1GB onboard memory/storage, such as SPI NAND, eMMC, SD NAND, flash, or other low-cost option - 3.7V Li-ion/LiPo battery input - Battery charging and protection circuit - 5V DC output using boost converter if needed - Audio output solder pads or through-holes for headphone wires - LED output pads for headphone LEDs - Optional Bluetooth audio module/chip - Optional accelerometer if practical - One physical ...

I need a physical model demonstrating an electrical circuit for a university science project. The model should include a battery, conductors, and insulators. Requirements: - Constructed from plastic, wood, and metal - A video showcasing the model in operation from multiple angles Ideal Skills and Experience: - Experience with model building - Understanding of electrical circuits - Proficient in video recording and editing

...├── Oil-Filled Transformer ←（建议补充） │ ├── Switchgear │ ├── LV Switchgear │ ├── MV Switchgear │ ├── Ring Main Unit (RMU) ←（建议补充） │ ├── Energy Storage (BESS) │ ├── Battery Cabinet │ ├── PCS (Power Conversion System) │ ├── Containerized BESS │ ├── Solar │ ├── Solar Modules (Panels) │ ├── Solar Inverters │ ├── Mounting & Racking ←（强烈建议补充） │ ├── Electrical Components │ ├── Bushing │ ├── Relay │ ├── Circuit Breaker │ ├── CT / PT ←（建议补充） │ ├── Protection Devices ←（建议补充） Also add: Solutions ├── Solar + Storage Kits ├── Data Center Power ├── Microgrid Systems 1. HERO Power Infrastructure Equipment + System Solutions Platform 2. PRODUCT CATEGORIES Transformers | Switchgear | Energy Storage | Solar 3. SOLUTIONS (HIGH PRIORITY) Solar + Storage Kits Data Cente...

...experience in the technical electronic domain. You’ll work alongside me on everything from early-stage circuit design to basic firmware tweaks, refining the lock’s functionality, helping validate the hardware on the bench, and documenting each step so the work can be replicated later. You do not need years of background—just a solid grasp of electronics fundamentals, the curiosity to learn fast, and the confidence to ask questions. Familiarity with simple microcontrollers, C/C++ or Arduino-style tooling, and any PCB design package will make the ramp-up smoother, but I’m happy to mentor you through unfamiliar areas. Deliverables I expect as we progress: • Updated schematics for each design revision • Clean, well-commente...

I am looking for a freelancer to create a professional, visually-driven technical presentation based on a single research paper (will be provided). Read and fully understand the research paper ,Convert the entire paper into a structured presentation format. professional, visually-driven technical presentation that prioritizes high-end graphics. Use custom-designed circuit diagrams and system architectures instead of bullet points, and employ clear flowcharts to break down complex processes step-by-step. All numerical data and complex tables must be converted into vibrant, modern charts that highlight key trends and statistical markers. The presentation must follow a logical sequence from the technical problem to the methodology, results, and a sophisticated critical evaluati...

I'm seeking an experienced PCB designer to create a single-layer circuit board for a radio prototype. The PCB will include sensors, power management units, and LEDs. Ideal skills and experience: - Proficiency in PCB design software - Experience with single-layer PCB layouts - Knowledge of integrating sensors and power management units - Familiarity with LED circuit design

I have a circuit idea that now needs to move from the sketchpad to a real-world prototype. The end goal is a fully built, ready-to-power-up PCB that I can use purely for test and evaluation. It is a basic esp32 temperature humidity detector with OLED. This is only to make a working prototype to test. I’m flexible on the technical route you take. Whether the design ends up single-, double- or multi-layer is entirely your call once you’ve balanced trace density, signal integrity and overall cost. The same freedom applies to board size, component selection and any IPC standards you feel are appropriate. What matters most is that the finished board functions reliably for bench testing and arrives with all the data. The project should be created with EasyEDA Delive...

...accurate 2D CAD drawings. The job is straightforward: turn my sketches into a finished floor plan, then layer in basic electrical and plumbing layouts so the set is ready for permit discussion and contractor pricing. The space is compact but it still needs to show a living area, sleeping zone, kitchen, and bathroom. Because this is for residential use, code-compliant fixture spacing and logical circuit runs are important, yet I am not after a full MEP engineering package—just a clear, well-labeled schematic that a builder and an electrician/plumber can follow. Please work in AutoCAD, Revit, or a comparable drafting tool and deliver: • Floor plan (scaled, dimensioned, room labels) • Electrical plan (outlets, switches, lights, breaker panel) • Plumbing p...

...the performance targets I’ll spell out for each task. Most assignments revolve around algorithmic problem solving—think classic contest-style challenges or tighter, system-level routines that have to run quickly and use memory efficiently. Because these projects sit inside my broader electrical-engineering coursework, I’ll occasionally ask for help translating equations into code, checking a circuit calculation, or making a quick tweak to an existing AutoCAD drawing. When the workload peaks, I may also hand over some structured data entry or light technical-support questions (typically Windows or EDA tool hiccups). If any unfamiliar topic comes up, I value a fast learner who can dive into datasheets or docs without constant nudging. What you deliver: • Mo...