Microcontrollerlavori

Ciao Michele, per questioni di velocità avvio app (no piu' boot time) dovrei passare dalla piattaforma raspberry pi ad un microcontroller piu' veloce nelle fasi di avvio App. Dovrei far eseguire il miei script già in Python 3.7 in micropython . In Python 3.7 uso la semplice e ottima libreria minimalmodbus (semplice lettura e scrittura di registri). Se possibile vorrei eseguirlo in micropython su ESP32. Se ci sei ci possiamo sentire su skype, ti spiego meglio. grazie intanto. R

Ciao Asad257, prima di tutto ho messo un importo solo indicativo, anche se non ho un grosso budget. Senza perdere tempo ti dico subito di cosa ho bisogno; qualche mese fa ho fatto fare un PCB, sono passati molti mesi dall'arrivo di questo pcb per mie motivi, trasloco ecc ecc ho dovuto fermare il tutto, chi me lo aveva fatto è sparito quindi mi trovo con un pcb con microcontroller e non riesco a programmare. il PCB funziona con ST Nucleo STM32F446, racchiude vari sensori tra cui: nr 8 uscite relè nr 5 uscite sensori di prossimità nr 3 sonde temperature ntc nr 1 sonda temperatura sonda k nr 3 led nr 3 motori DC nr 1 lettura analogica consumo di un motore nr 1 letture di flusso acqua (legge gli impulsi di una turbina) nr 1 modulo per load cell nr 1 modulo cal...

Using VHDL to design a microcontroller peripheral in Quartus software, (Altera).

Altium PCB design and Microcontroller Altium PCB design and Microcontroller

...spans embedded firmware through to field wiring, so I need someone who is equally comfortable writing low-level code and crimping a terminal block. Scope of work The core task is to design and deploy a complete connected node (or nodes) that gathers data from the filtration skid, pushes those readings to a cloud or local dashboard, and executes real-time control logic. You’ll decide the microcontroller or SBC platform, pick the right sensors for viscosity, particulate count, pressure or any other parameter critical to oil quality, and integrate them cleanly into existing panels. A solid grasp of industrial protocols (Modbus, CAN, Ethernet/IP, etc.) will be helpful because the controller must talk to the plant’s PLC network. On-site involvement Lab prototyping ca...

...device. The device will be used in an industrial factory environment to monitor electrical parameters and send data to a server through IoT. Project Goal We want to develop a compact and reliable PCB for monitoring: Voltage Current Power consumption Energy consumption / kWh Power factor, if possible Basic electrical health/status data The device may use ESP32 or any suitable low-cost microcontroller, but the final solution must be practical, reliable, and cost-optimized. Main Requirement The most important requirement is low total product cost. The PCB design must be optimized so that: PCB manufacturing cost stays low Component cost stays low Assembly cost stays low The product can be produced in bulk later Components should be easily available from suppliers l...

I need production-ready firmware for an STM32F303 that turns the microcontroller into a front-end for high-speed digitisation of SDR signals. The chip’s ADCs must sample the incoming RF-baseband stream, move the data through DMA with minimal latency, and prepare it for onward transmission over a fast serial link (either SPI or UART—whichever achieves the cleanest, sustained throughput on this part). The core of the job is sensor-style data processing: capture, buffer, and pre-format the raw samples so that an external host can handle the heavier DSP. No motor-control, no classic temperature or pressure sensors—just clean, reliable handling of SDR-grade analogue input. Key expectations • Continuous, gap-free acquisition at the highest practical sampling rat...

I need production-ready firmware for an STM32F303 that turns the microcontroller into a front-end for high-speed digitisation of SDR signals. The chip’s ADCs must sample the incoming RF-baseband stream, move the data through DMA with minimal latency, and prepare it for onward transmission over a fast serial link (either SPI or UART—whichever achieves the cleanest, sustained throughput on this part). The core of the job is sensor-style data processing: capture, buffer, and pre-format the raw samples so that an external host can handle the heavier DSP. No motor-control, no classic temperature or pressure sensors—just clean, reliable handling of SDR-grade analogue input. Key expectations • Continuous, gap-free acquisition at the highest practical sampling rat...

I need an experienced embedded systems and PCB design engineer to design a compact NFC Reader module based on the ESP32 microcontroller and NFC transceiver. The board should read NFC tags and toggle a relay output to control external devices such as door locks, motors, or other automation equipment. Key Functional Requirements: - ESP32 as the main microcontroller (Wi-Fi & Bluetooth capable) - NFC transceiver - Relay output toggled by ESP32 GPIO when a valid NFC tag is detected - Wide input voltage range: 10–24V DC - Multi-rail power supply: - LED indicator header pins for visual feedback Firmware Requirements: - Read UID from NFC tags - Toggle relay on valid tag detection - Sleep mode support for low power consumption Deliverables: - Complete schematic desi...

I’m looking for a skilled hardware-and-firmware engineer to create a SMART Power Distribution Unit that I can move quickly into production. The unit must include: • Remote monitoring of every outlet • Per-outlet and aggregate energy metering • Built-in surge protection that meets standard safety ratings I’d like the communication layer to run over SNMP, so please plan your microcontroller, Ethernet stack, and MIB files around that protocol. If you normally add Modbus or HTTP support, feel free to flag that as an optional extra, but SNMP is essential. 1 inlet 220V 20A, 8 outlet 220V 5A. It case refer 1U measure. Mechanical parts are manufactured by ourside. Core deliverables I expect: 1. Complete electrical schematic and PCB layout (Altium, KiCa...

...Smart Lock (Custom Design) Project Description: I am looking for an experienced Electronics/Hardware Engineer to develop a functional prototype of a custom GSM-based smart lock designed for farmhouse and agricultural security. Unlike standard "plug-and-play" kits, this is a custom-built system designed for high durability and specialized mechanical features. Key Technical Requirements: Microcontroller: Arduino Nano or ESP32 preferred for the initial prototype. GSM Module: Must use SIM800L or a 4G-compatible module (e.g., SIM7600) for remote operation via SMS and Call. Actuation: High-torque 12V DC motor control (Actuator or High-Torque Metal Gear Servo). Custom "Wiggle/Multi-Fire" Logic: The system must be programmed to attempt the locking/unlocking acti...

...developing. The job covers the full path from concept to production-ready files: translating high-level functional requirements into a detailed schematic, validating the design through simulation, and handing over neat, fabrication-ready PCB layouts with an up-to-date bill of materials. The circuit blends low-noise analog front-end blocks with a modest-speed digital section driven by a microcontroller, so proven experience balancing analog performance against digital switching noise is essential. I expect all design work to be done in a mainstream tool such as Altium Designer, KiCad, or Cadence OrCAD/Allegro—whichever you are fastest with—while simulations can run in LTspice, PSpice, or an equivalent platform. Deliverables • Annotated schematic (PDF + sou...

...firmware must: • Drive general heating and cooling cycles, making periodic adjustments to maintain the setpoint (stability-focused, not ultra-tight precision) • Continuously monitor sensors and trigger safety alarms when temperatures exceed safe limits or faults are detected • Handle an on-device user interface for clinicians (set temperature, monitor status, acknowledge alarms) **Platform:** Microcontroller family is flexible (Cortex-M / PIC / equivalent), but the design must align with IEC 60601 expectations for safety and reliability. **Deliverables:** 1. Clean, well-structured, compilable C/C++ firmware (RTOS experience preferred) 2. Build instructions and project setup 3. Configuration tables for temperature ranges and alarm thresholds (modifiable without ...

...survive arctic freezes or tropical monsoons. A compact, low-power design is preferred, and I’m open to ultrasonic, IR, capacitive, load-cell, or any other sensor technology you feel is best suited to the job, provided it stays reliable outdoors. What I need from you: • A complete hardware design: schematics, PCB files (if applicable), and a clearly identified bill of materials. • Firmware or microcontroller code that flags “object present” / “object absent” events for each shelf and can push that data over a simple interface (UART, I²C, MQTT—your recommendation). • A brief test protocol showing how you validated detection accuracy with different item shapes and materials. • Installation guidelines so a non-engine...

...handled separately. I need someone to design and deliver the working electrical and electronic system. --- Scope of Work 1. Timekeeping & Motor Control** - Accurate clock circuit (RTC module preferred, e.g. DS3231) to drive the rotation at the correct speed - Stepper or gear motor selection and driving circuit for smooth, precise rotation (1 full rotation = 12 hours) - Motor driver circuit/microcontroller programming (Arduino, ESP32, or similar) 2. Power Delivery to the Rotating Arm - Design a reliable method to power the LED on the rotating arm without wires twisting — options include: - Slip ring (preferred for simplicity) - Inductive/wireless power transfer coil - Specify components and provide wiring schematics 3. LED Circuit - Select an appropriate low-vol...

...mouthpiece (25mm OD, 15mm airflow bore) • M2 stainless fasteners, alignment pins, threaded rear cap • Internal airflow channel 12–15mm diameter, sensor chamber at proximal end Electronics & PCB: • Custom 5-layer PCB (40mm × 25mm — fabricate via JLCPCB or PCBWay using our schematic) • Differential pressure sensor (Honeywell HSCDANN005PG2A3) • Auxiliary flow sensor • STM32 or ESP32-S3 microcontroller with BLE • 30×12mm OLED display (SSD1306, I2C) • 18650 Li-Ion 3.7V battery + USB-C charging circuit (TP4056 IC) • Tactile button, capacitors, resistors, connectors per BOM Important — Firmware Flashing: Finalized firmware will be provided along with step-by-step flashing instructions written by o...

...by up to 30% through smart scheduling * Integrated mobile alerts for real-time monitoring * Tested system on small-scale # Full Description: The Smart Irrigation System is an automated solution designed to optimize water usage in agriculture. It uses soil moisture sensors to monitor the condition of the soil and determines when irrigation is necessary. The system is powered by an Arduino microcontroller, which processes sensor data and activates the water pump accordingly. This reduces unnecessary watering and conserves water resources. Additionally, the system can send mobile notifications to users, allowing them to monitor and control irrigation remotely. The project was tested on a small-scale farm setup and demonstrated a significant reduction in water consumption while ma...

...by up to 30% through smart scheduling * Integrated mobile alerts for real-time monitoring * Tested system on small-scale # Full Description: The Smart Irrigation System is an automated solution designed to optimize water usage in agriculture. It uses soil moisture sensors to monitor the condition of the soil and determines when irrigation is necessary. The system is powered by an Arduino microcontroller, which processes sensor data and activates the water pump accordingly. This reduces unnecessary watering and conserves water resources. Additionally, the system can send mobile notifications to users, allowing them to monitor and control irrigation remotely. The project was tested on a small-scale farm setup and demonstrated a significant reduction in water consumption while ma...

...that relies on a disposable filter, and I need an embedded electronics design that reliably tells users when that filter has reached the end of its life. The core requirement is clear: once the filter’s usable period or flow-rate threshold is met, the system must alert the user that a replacement is due. Here is what I’m expecting from you: • Hardware design: a compact, low-cost circuit (microcontroller-based or otherwise) able to sense filter usage and I don’t want a beep sound in the hardware, I only need LED indication with red and green lights. • Firmware: well-documented code that tracks usage time/flow and triggers the end-of-life signal with accuracy and repeatability. • Prototype files: schematic, PCB layout, BOM, and compiled firmw...

I have an existing board that only needs a light touch, but it has to be done fast. THE CIRCUIT CURRENTLY FUNCTIONS AS INTENDED. DO NOT CHANGE ANY CONNECTIONS INSIDE THE CIRCUIT, JUST WHERE THE EXTERNAL WIRES CONNECT!!! I need the microcontroller (Xiao nrf52840) centered on the board (it's currently slightly off center). I need the JSTs that are currently on the sides to simply trade "E+" for "A+" so that the two JST pairings are then (E-, A+) and (E+, A-). You are swapping the actual traces that connect as well as the print on the PCB. Swap the actual JST fittings for 90 degree JSTs but keep the same size. Swap the battery JST (B+, GND) for a 2mm 90 degree JST facing the right side of the board.

...Systems & IoT Firmware Engineer Executive Summary: Highly skilled Embedded Systems Engineer with extensive experience in the full product development lifecycle, from PCB design to RTOS-based firmware implementation. Proven track record of developing robust IoT solutions across diverse architectures including ARM Cortex-M, ESP32, and legacy microcontrollers. Technical Core Competencies: * Microcontroller Expertise: Expert-level development on ARM Cortex-M (M0/M4/M7), ESP32 (Xtensa/RISC-V), Nuvoton, PIC, and Atmel (AVR/SAM) platforms. * RTOS & Firmware: Advanced proficiency in FreeRTOS (specifically for ESP32/ESP-IDF), multitasking, and low-latency system architecture. * Development Environments: Power user of industry-standard IDEs including Keil MDK, IAR Embedded Workben...

I would like to explain my project . The project is about designing a temperature sensing circuit using an operational amplifier (Op-Amp) without using any microcontroller. The main idea of the project is to measure the surrounding temperature using a temperature sensor and compare it with a reference temperature that can be adjusted manually using a potentiometer. If the measured temperature exceeds the reference value, the circuit will activate an output, which is an LED indicator. Otherwise, the LED will remain off. This system is useful in applications such as factories, where it is important to monitor temperature to prevent damage to stored goods. In the project, I will: • Design and simulate the circuit using Multisim. • Set the reference temperature (around 24...

I need a compact two-layer PCB laid out in Altium Designer for an industrial-control product. The schematic is ready and centres on a microcontroller that must talk to the outside world through both RS485 and Modbus, so the board has to keep those differential pairs clean, properly terminated, and routed with industrial-grade robustness. The job covers: • Translating my finished schematic into a neat, manufacturable board outline that fits the mechanical envelope I will provide. • Placing the microcontroller, its support parts, and the required communication-interface circuitry while observing good separation between digital and noisy field lines. • Layer-stack definition, clear power/ground strategy, silkscreen clarity, and all the DRC housekeeping ex...

Project Overview The goal is to design and deliver a single-board motherboard (Gerber-ready) powered from a 22V battery source, integrating: * Multi-rail power management * Digital control system * High-voltage generation architecture (conceptual + control side) * Touchscreen UI interface * Precision timing and current control The system will be controlled via a microcontroller (ESP32 or equivalent) and connected to a Windows 11-based mini computer for UI processing. Core System Requirements (High-Level) 1. Power Management Subsystem * Input: 22V battery (approx. 2500 mAh) * Regulated outputs: * 3.3V (MCU & logic) * 5V (peripherals) * 12V (drivers) * 15V (analog/control stages) * Efficient DC-DC topology (buck/isolated as required) * Protection: OVP, OCP, ...

...The LEDs, their forward voltage, and every mechanical detail—including the exact inner and outer diameters—are already fixed in the drawing you will receive, along with the Digi-Key part number. All anodes share one rail, all cathodes share the opposite rail, and every LED must have its own calculated series resistor so the current stays within the limits stated in the datasheet. No logic, microcontroller, or programming is involved. The LEDs must sit side-by-side in their pairs so the light appears clustered, then those five pairs are spaced around the ring exactly as shown on the mechanical. Please keep the layout clean, manufacturable, and symmetric so each LED sees the same impedance path. Deliverables • Production-ready Gerber and drill files • Pi...

...architecture (conceptual + control side) * Touchscreen UI interface * Precision timing and current control For HV use different board DIODE & Capacitor multiplier until 100 KV stages The system will be controlled via a microcontroller (STM32H743VIT6 + ADC eksternal ADS127L11 / AD7768 / ADS131M08 or FPGA ARTIX 7, there is analog from Photo Multiplier Tube , amplified with low noise and then to noise pass filter then integer before to high speed adc minimum 16 bit ) and all graphic connected to a Windows 11-based mini computer for UI processing. Your task only give rawa output from microcontroller related voltage, current and exposure time precision. Otherwise windows software will be done from our side ⸻ Core System Requirements (High-Level) 1. Power Management Sub...

...two servomotor. The servomotors must be rigidly mounted so it can press two specific buttons on the blower. Scope • I'll give you a 3D-scan of the blower (.obj) • Design a two-part shell that can be 3D-printed (PLA/ABS), with screws/nuts (visible but just beneath the surface) for assembly. • Respect constraint indicated on documentation • Provide internal standoffs/brackets for: – One microcontroller/PCB (60 × 40 x 20 mm footprint) - place where you want – Two hobby-size servomotor (size provided on documentation) • Place 2 holes on the marked face for PG7 cable gland (see documentation) • Optionnaly (make it on another version), include cable channels Deliverables 1. Native CAD file (SolidWorks, STEP, Sketchup, ...) 2. ...

...Bluetooth Low Energy (BLE) to a mobile/web dashboard • Connects to a cloud AI inference API (AWS or GCP) for advanced analysis What I need you to do: • Review the full existing codebase written in Python/Cursor • Identify and fix any bugs, logic errors, or incomplete functions • Hardcode and secure all API keys and cloud endpoints • Adapt and compile the code to run on an ESP32-S3 or STM32 microcontroller • Ensure BLE communication is properly configured and functional • Ensure OLED display output is working correctly • Verify sensor data input pipeline is correctly reading and converting pressure to flow (L/s) using Bernoulli equation • Verify FEV1 is correctly calculated as integral of flow from t=0 to t=1 second • Ver...

Project Brief: Stealth-Mod...product. • The functionality must be fully automatic. No user interaction should be needed after parking. • No visible alterations (e.g., wires, unusual controls, abnormal movement patterns). • Power should remain efficient — preferably still battery-powered or with a hidden upgrade that doesn’t draw attention. Ideal Freelancer Profile: I’m looking for someone with experience in electronics, microcontroller programming (e.g., Arduino), or embedded systems. Ideally, you’ve worked with consumer electronics, automotive modifications, or smart devices before. Both functionality and stealth are equally important for this project. ⸻ Let me know if you have questions or need specific details (such as device models). ...

...road-proximity zone using GPS geofencing and automatically triggers an audible alarm to deter the animal from crossing. The device is solar-powered with a lithium battery backup for continuous field operation, housed in a weatherproof enclosure suitable for Indian outdoor conditions. The full technical scope of work is attached to this posting. It covers all hardware specifications (GPS module, microcontroller, solar charging system, alarm, and housing), firmware requirements, deliverables, and acceptance criteria. Please review the attached document before submitting your proposal, and include your fixed-price quote, estimated timeline, and examples of similar embedded hardware projects you have completed....

I need an experienced PCB designer to take my concept all the way from a clean, well-documented schematic through to final production files. The board’s purpose is digital-only signal transmission, and it will revolve around a microcontroller core talking to several onboard sensors. Here’s what I expect from you: • A reviewed and ready-to-hand schematic with clear net naming and annotation. • Component selection focused on reliable microcontrollers and sensors; if supporting parts or alternative communication modules improve integrity, you’re free to recommend them. • A compact, manufacturable layout that respects high-speed digital design rules, proper decoupling, and clean ground referencing. • Full output package: Gerbers, drill fi...

I need an experienced PCB designer to take my concept all the way from a clean, well-documented schematic through to final production files. The board’s purpose is digital-only signal transmission, and it will revolve around a microcontroller core talking to several onboard sensors. Here’s what I expect from you: • A reviewed and ready-to-hand schematic with clear net naming and annotation. • Component selection focused on reliable microcontrollers and sensors; if supporting parts or alternative communication modules improve integrity, you’re free to recommend them. • A compact, manufacturable layout that respects high-speed digital design rules, proper decoupling, and clean ground referencing. • Full output package: Gerbers, drill fi...

...Systems & IoT Firmware Engineer Executive Summary: Highly skilled Embedded Systems Engineer with extensive experience in the full product development lifecycle, from PCB design to RTOS-based firmware implementation. Proven track record of developing robust IoT solutions across diverse architectures including ARM Cortex-M, ESP32, and legacy microcontrollers. Technical Core Competencies: * Microcontroller Expertise: Expert-level development on ARM Cortex-M (M0/M4/M7), ESP32 (Xtensa/RISC-V), Nuvoton, PIC, and Atmel (AVR/SAM) platforms. * RTOS & Firmware: Advanced proficiency in FreeRTOS (specifically for ESP32/ESP-IDF), multitasking, and low-latency system architecture. * Development Environments: Power user of industry-standard IDEs including Keil MDK, IAR Embedded Workben...

I have a bread-boarded prototype built around Dialog’s DA16600 Wi-Fi/BLE microcontroller that drives two ePaper displays and includes a small BMS for a single-cell Li-ion pack. It is time to turn this stack of jumper wires into a professionally laid-out PCB created entirely in KiCad. The board must replicate every feature of the prototype while adding proper power-management circuitry so the system can move smoothly between active, sleep and charging states. Clean routing for the high-current path of the BMS and the low-noise requirements of the ePaper lines is essential. Experience with the DA16600 reference design, its RF keep-out requirements and its programming/boot strapping options will be a strong advantage. What I will hand over • A complete schematic of the c...

...Requirements: - Form factor: footprint similar to a shoe, height ≤ 2 cm - Weight: as light as possible while maintaining sufficient structural integrity - Mounting: attachable underneath a shoe using a strap or comparable fixation system - Integrated display: display unit mounted on the strap (e.g. for weight or status) - Measurement: capture of weight - Electronics: Bluetooth Low Energy (BLE) - Microcontroller: preferably ESP32 - Power supply: battery-operated, energy-efficient - Build: robust, impact-resistant, suitable for everyday use Scope clarification: - Software (firmware and app) will be developed in-house and is not part of this project Expected deliverables: - Concept and design (mechanical and electrical) - Selection of suitable sensor technology (e.g. load cells...

...flagging of each test step based on measured data. • Calibration Module: Interface to apply offsets to sensors. III. Automatic Reporting • Report Generation: Professional PDF/CSV export. • Content: TCU ID, Timestamp, Measured vs. Nominal table, Voltage stability log, Pass/Fail status, and high-resolution graphs for Pressure and RPM. 5. Deliverables 1. Firmware: Complete source code for the microcontroller. 2. PC Software: Source code and Executable for the Desktop App. 3. Schematics: Detailed wiring diagram including isolation and termination. 4. DIDs & Checksum Map: Documentation of the identified UDS addresses and the CRC algorithm used. 6. Candidate Requirements • Expertise in CAN-Bus, ISO-TP, and UDS (ISO 14229). • Reverse Engineering Skills: Abil...

...UI (no lag) --- ## Functional Features: * Real-time speed display * Distance calculation (trip + total) * Battery voltage monitoring * Fault indication display * Startup animation / branding (optional) * Menu/settings (optional) --- ## Communication: * Support UART or CAN communication from controller * Option to work with pulse-based speed input --- ## Hardware Requirements: * Microcontroller-based design * Stable power supply (12V → 5V / 3.3V) * EMI-resistant design for automotive environment * Proper filtering for noisy signals --- ## PCB Requirements: * Compact PCB for dashboard enclosure * Automotive-grade connectors * Vibration-resistant design * Easy mounting provision --- ## Firmware Requirements: * Fast refresh rate display * Accurate speed &...

...UI (no lag) --- ## Functional Features: * Real-time speed display * Distance calculation (trip + total) * Battery voltage monitoring * Fault indication display * Startup animation / branding (optional) * Menu/settings (optional) --- ## Communication: * Support UART or CAN communication from controller * Option to work with pulse-based speed input --- ## Hardware Requirements: * Microcontroller-based design * Stable power supply (12V → 5V / 3.3V) * EMI-resistant design for automotive environment * Proper filtering for noisy signals --- ## PCB Requirements: * Compact PCB for dashboard enclosure * Automotive-grade connectors * Vibration-resistant design * Easy mounting provision --- ## Firmware Requirements: * Fast refresh rate display * Accurate speed &...

I’m developing a compact biometric terminal built around an ESP32 and a fingerprint scanner, and I need production-ready firmware that lets the hardware shine. The microcontroller must enrol and match prints locally in real time, then immediately publish the results to a cloud back-end for long-term storage and analytics. No on-device history needs to persist once the upload is confirmed, so the code should free local buffers promptly to keep RAM usage low. Core requirements • Real-time capture, template creation and matching on the ESP32 (FreeRTOS / ESP-IDF or Arduino-ESP32—whichever you’re fastest with). • Secure HTTPS or MQTT push to the cloud of my choice (AWS IoT Core is preferred, but your proven alternative is welcome). • Robust reconne...

I want a silicone wristband that can give off very quiet vibrations. The core functions are simple but non-negotiable: • A single, unobtrusive button on the band starts or stops the motor immediately. • In “random” mode the firmware should trigger short vibrations at unpredictable intervals; in...off-the-shelf blank if that simplifies the build. Deliverables • Circuit schematic, parts list and 3D files for the enclosure insert. • Firmware with clearly commented code allowing me to edit interval ranges and vibration length. • One fully assembled, rechargeable prototype (USB-C preferred) plus step-by-step assembly photos. I’m happy to iterate quickly, so please outline your proposed microcontroller, motor type, and estimated ...

This project involves developing an embedded graphics application that reads serial data from the RX pin of a QT Py RP2040 microcontroller and visualizes the incoming CPS (Counts Per Second) data in real time on an IL19341 TFT display. The system will continuously capture incoming serial data, process it, and render it as a dynamic graph, enabling live monitoring and analysis of CPS values. The graphical interface will be optimized for clarity, responsiveness, and efficient memory usage within the constraints of the RP2040 platform.

...watches for an unusual splash or tilt, and fires a loud buzzer if something—or someone—hits the pool unexpectedly. Hardware on hand • Arduino-compatible board • 3-axis tilt/accelerometer sensor • Piezo buzzer (primary alarm) • Optional LED and on-board Li-ion pack (solar top-up later) What I’d like you to do 1. Draw up a clean wiring diagram that links the sensor, buzzer and microcontroller so I can reproduce it on a breadboard first, then on perf-board. 2. Write the Arduino sketch that: – Reads the accelerometer, applies filtering, and compares movement against an adjustable threshold (potentiometer or software value). – Ignores gentle ripples but reacts instantly to a sudden splash or 30-degree tilt. ...

This quote is for designing a PCB gerber for a circuit having following 8 bit PIC4520 microcontroller 10 keys input(capacitive touch) Input voltage 36v DC and 24v DC 1 ADC input 2 outputs control (24v) 1 output using h bridge (36v) Display 128x64 LCD 5v conversion from 24v input for microcontroller circuit Deliverable: Schematic, PCB Gerber, BOM and Pick & Place File.

...two stepper-based peristaltic pumps independently at variable speeds, open and close a bank of solenoid valves, and exchange data with a Nextion touchscreen. I already have functional requirements and a block diagram; what I need from you is the complete hardware design that turns those ideas into a production-ready board. Scope of work • Capture the full schematic, selecting a suitable microcontroller or SoC, stepper drivers, MOSFET or driver ICs for the solenoids, power-supply stages, and all protections. • Lay out a compact, low-noise PCB that separates the high-current paths of the pumps and valves from the logic section driving the Nextion display. • Deliver fabrication files (Gerbers, drill, pick-and-place, and clear assembly drawings) plus a well-stru...

...(speed, split, stroke rate, power, heart rate zone, check factor) to a companion React Native app. We need a single experienced freelancer (or small team) to take the project from our detailed technical brief through to a working pilot batch of 5–10 units across two hardware variants. SCOPE OF WORK 1. PCB Design 4-layer board, 85×45×1.6mm. Key components are fully specified: Nordic nRF52840 microcontroller, u-blox SAM-M10Q GPS (25Hz multi-GNSS), ST LSM6DSO IMU (200Hz), IP68 RGB illuminated pushbutton, TPS63020 3.3V buck-boost rail, MT3608 5V phone charge passthrough, TP5100 Li-ion battery charger, 10Ah Li-ion pouch cell. A second variant (Cox) adds a TI TAS2560 audio amplifier and TPS61170 boost converter. STEP files for the IP68 case and a full component brief ...

...existing Arduino-based Wi-Fi prototype that already runs stable C++ firmware. I now need the same functionality condensed into a custom PCB no larger than 70 mm × 50 mm, with hard-wired Ethernet via an RJ45 connector, onboard 12 V power input that can be sensed from 0 V–15 V, and an integrated temperature sensor. You will take the current code that i supply, select the most size-efficient microcontroller (ATmega32U4, ESP32-Ethernet, STM32, or similar—open to your advice), and lay out a production-ready board. The board must expose a standard USB or UART header so I can upload updated C++ sketches without special tooling. Deliverables • Editable schematic and PCB layout files • Gerbers, drill files, and BOM with manufacturer part numbers • ...

...analog filtering required (low-pass) 2. Amplitude Control Controlled via DAC (e.g., MCP4822 or equivalent – developer may choose) Adjustable via PC interface (not continuously dynamic) Stable and calibrated output expected 3. Offset Control (Critical Feature) Real-time adjustable DC offset via USB interface Update rate target: ~10 kHz Smooth and predictable response (no major glitches) 4. Microcontroller Preferred: Teensy 4.1 (or equivalent high-performance MCU) Must handle: USB communication (PC and MCU) SPI communication (DDS + DAC on shared bus) Deterministic timing for DAC updates 5. Analog Stage Op-amp based summing / conditioning stage (e.g., NE5532 / OPA series or equivalent) Must support: DDS sine input DAC-controlled offset Amplitude scaling Clean output with minim...

...development efforts, we engage in structured quarterly (3-month) projects with a focus on continuous improvement, new feature development, and system optimization across our product stack. The scope of work typically includes: Design and implementation of robust C++ software architectures for embedded and backend systems Development and optimization of embedded firmware using C and C++ for microcontroller-based platforms Integration and debugging of electronics systems, including communication interfaces and peripheral control Work on Embedded Linux environments, including system-level development, networking, and device interfacing Development and integration of AI/ML components for intelligent system behavior, data processing, or predictive features Performance optimization, co...

...transmitter and receiver, ready for fabrication. • PCB Gerber files. • Breadboard demonstrating functionality. • Firmware (or discrete logic plan) that decodes the signal and drives the action sequence pins • A succinct test report proving range, stability, and correct execution of the sequence in a lab environment. You are free to propose the frequency band, modulation scheme and microcontroller or RF chipset, as long as the final design complies with unlicensed operation rules in major markets. I’ll supply the exact action sequence and GPIO mapping once we’ve agreed on the architecture, so please show that you can handle both hardware design and embedded code. If you’ve previously delivered robust remote controls or key-fob styl...

...Monitoring System (ESP32 + HX711 + Web Interface) Project Description: I am developing a final-year Electrical & Electronics Engineering project and need assistance building a smart weight monitoring system for a single shelf. The system will measure and track weight changes in real-time using a load cell sensor and transmit the data to a web-based interface. Hardware Requirements: ESP32 microcontroller (Wi-Fi enabled) HX711 load cell amplifier Load cell (weight sensor) Stable and accurate measurement (handle noise and drift) Software Requirements: ESP32 firmware (C/C++ / Arduino framework) Real-time data acquisition from HX711 Wi-Fi communication (HTTP or MQTT) Data transmission to a web server Web Interface: Simple dashboard (web-based) Display current weight in rea...