Microcontroller Jobs

ESP32-Based Wearable Dementia Safety & Voice-Reminder Prototype Project Overview I am looking for an embedded systems / IoT developer to build a single functional prototype of a wearable device called Mitra – Wearable Guardian for Dementia Care. This is a student innovation/competition prototype, not a commercial medical device. The priority is to create a reliable, compact and presentable working prototype at a reasonable cost. I am specifically looking for someone experienced with ESP32, GSM/SMS, sensors, audio playback, PCB design and small wearable electronics. --- Required Features 1. Emergency SOS - Physical, easily accessible SOS button. - When pressed, Mitra should send an actual SMS to a pre-configured caregiver phone number. - SMS should contain: - Emergency ale...

Pic16f1829 , push pull (180 phase shift same duty cycle for both output, no duty cycle invert cycle by cycle) pin details below and function 1, vcc 5v (on switch) 2, fan MOSFET gate signal 3, 10k NTC tie with 5v ground resistor 10k and 100nf pf . 50c fan speed is half 50c -80c full speed above 90c engage fault and run fan 100% 4, mclr ground with 100nf pf 5, 25khz push PWM closed loop with pin 14 adjust duty cycle according to output keep stable voltage max duty cycle 45% 6. 25khz pull PWM 180 phase shift output of pin 5 same duty cycle no invert out . Closed loop with pin 14 max DUTY CYCLE 45% 7, on ok green led signal 8, 190khz 50% fixed duty cycle no distrub perfect and clean 9. Nc 10, fault led signal . pin14 95v fail continuous on, temperature fail twice blink break repeat, 3 b...

I am looking for an expert Electronics Design Engineer to review, optimize, and finalize a draft KiCad schematic for a custom, battery-powered audio logging device. The core architecture relies on an ESP32-S3-WROOM-1-N16R8-1U module paired with a TDK T5838 digital microphone featuring Acoustic Activity Detection (AAD). The device operates primarily in an ultra-low power standby mode: the ESP32-S3 stays in deep sleep with Wi-Fi completely turned off, while the TDK T5838 remains always-on to monitor the acoustic environment. When a sound trigger occurs, the microphone must wake the ESP32-S3 using an AAD interrupt (via D1, D2, or Analog AAD mode) to record audio onto a microSD card. The ESP32-S3 will wake up its Wi-Fi radio only during a specific, firmware-defined time window to transmit the ...

Max bid is 45 ### Project: Modify Existing Dispenser PCB for RS485 Communication We have an existing PCB for a specific fuel dispenser brand (XYZ), as shown in the attached image. It connects to the dispenser through four differential communication wires: RX+, RX−, TX+, and TX−, and currently converts the communication to USB. **The objective is to replace the USB interface with RS485 while retaining the existing PCB and dispenser-side circuitry as much as possible.** ### Scope of Work - Analyze the PCB and identify the USB controller and the communication signals between the USB controller and the existing four-wire interface circuit. - Determine the appropriate signal points where the USB communication interface can be bypassed or replaced. - Connect those signals to a sui...

I’m developing a next-generation padlock that couples robust physical security with modern electronics. The core idea is a tamper-resistant body housing a low-power PCB that supports BLE unlocking, RFID credential reading and an always-on GPS module. A compact solar panel must keep the cell topped up so the lock can sit in the field for long stretches without manual charging. Here is the outline I need your help bringing to life: • Electronics: choose components, lay out the PCB and write the embedded code so the lock wakes only when needed, yet still logs location pings. Expect Nordic-style BLE, an ultra-low-power GPS, RFID reader IC, power-path management and secure element for key storage. • Power strategy: harvest energy from the solar cell, switch gracefully to an ...

I'm seeking an experienced developer to create a wearable LED suit for professional stage performances. The suit should be controlled by ESP32 controllers and feature WS2812B addressable LED strips and side-glow fiber optics. Objective : Building LED-embedded costumes synced to music beats using Raspberry Pi and XLights. Each costume will have one Raspberry Pi 4 (slave), connected to 4 or more customized relay/driver boards—each controlling a specific body zone (head, arms, chest, legs). We need help configuring GPIO outputs via FPP and customizing the relay/driver boards to handle high-power LED/fiber optics/LED cloth sheet outputs, with independent control of lighting patterns for each zone. The setup must respond to a central master Pi broadcasting music-synced commands wir...

I’m working with Avishkaar AMS and need a skilled block-coder to help me push the platform’s limits. The goal is pure experimentation and testing, so we can tinker, iterate, and learn fast without being tied to a fixed lesson plan. The blocks you create will drive a small robot that also hosts a sensor stack. I want to see it: • move precisely and navigate around a mapped or unknown space, • sense and avoid obstacles in real time, and • log key sensor readings so I can later analyse the data. All code must be built only with the official Avishkaar AMS block palette—no external scripts or text-based hacks—so everything runs natively on the board. Comment your blocks clearly, keep each routine modular, and share the final program file along with a...

Hi, I’m looking for someone who can help me with ESP32 HMI programming. Are you available, or do you know someone who might be interested? we are traying to make a programable inter face wit touch screen capabilities. with drop down menu tabs. home screens to display a background. the idea is to have it just on a picture and be able to swipe to a second menu where it controls relays off and on using an Arduino nano.

I’m building a compact control panel that combines an ESP32 core, a membrane keypad, and a 3.5-inch TFT LCD. I already have functional requirements and rough block diagrams; what I now need is the full electronic design, ready for manufacturing. Scope • Power architecture: single regulated 5 V input with the necessary step-downs and filtration for the ESP32’s 3 V3 rail, back-light drive, and any aux lines. • Digital section: ESP32 module or bare chip with all pins broken out for firmware flashing, reset, and debugging. • Interfaces: matrix keypad connector and ESD protection, 8/16-bit TFT LCD interface, plus level-shifting where required. • Communications: I²C, SPI, and UART brought to headers for external sensors and future expansion. •...

# TECHNICAL REQUIREMENTS ## VHF SAME Receiver and AFSK/FSK Demodulator **Document:** RT-RF-SAME-001 **Revision:** 1.1 **Application:** EAS-SAME/SASMEX Signal Receiver **Target Frequency:** 162.425 MHz **Operating Band:** 162.400–162.550 MHz --- ## 1. OBJECTIVE Design and develop an electronic module capable of receiving the VHF signal at **162.425 MHz**, demodulating the NFM transmission, recovering the baseband signal, and demodulating the **AFSK/FSK data used by SAME (Specific Area Message Encoding)**. The module shall cover the complete signal chain: **Antenna/RF Input → RF Filtering → VHF Receiver → NFM Demodulation → Baseband Conditioning → AFSK/FSK Demodulation → Digital DATA_OUT** The final output shall be ready for connection to an extern...

1. Industrial Air Compressor Control Engineer – PLC Programming & System Integration (Hitachi Preferred) We are looking for an experienced Industrial Air Compressor Control Engineer / PLC Programmer to support the development and integration of control systems for industrial air compressors. The ideal candidate should have hands-on experience with industrial air compressor control systems, PLC programming, electrical control circuits, and communication between compressor controllers and external automation systems. Experience with Hitachi air compressors is highly preferred. Experience with other major brands, such as Atlas Copco, Ingersoll Rand, Kobelco, and other industrial compressor manufacturers, is also welcome. 2. Required Technical Skills Candidates should have practica...

Our two-turbine, 2 × 250 kW hydroelectric station is now in the construction phase and the control panels are ready for code. I need a complete PLC program built around a Delta CPU of AS series. The logic must: • Start, stop, and protect each Francis turbine, including speed regulation and emergency shutdown routines. • Modulate inlet gates to manage water flow while maintaining set-point head and optimising efficiency. • Continuously monitor generator voltage, current, frequency and bearing temperatures, triggering alarms and trips when limits are breached. An accompanying HMI (Delta DOP or compatible) with clear status pages, trending, and manual-override screens is expected. I will supply P&IDs, I/O lists, and functional descriptions—your task i...

need a small IoT device built that can read data from a Selec 500 UCI PID controller through its RS-485 Modbus port and send those values automatically to a Google Sheet via Wi-Fi. The device should: 1. Use an ESP32 board (low-cost, Arduino-compatible). 2. Take input from the RS-485 port of the Selec PID using a MAX485 module. 3. Host a Wi-Fi setup page (so user can enter SSID & password). 4. Send the PID readings (PV, SP, and OP values) every few seconds to a Google Sheet (via a Google Apps Script endpoint). 5. Work on 5V DC or USB power. 6. Be housed in a small project box or DIN rail enclosure for industrial use.

I aim to develop a solution that will facilitate data communication between an Arduino UNO and a SIM7600E using AT+COMMAND. The primary data in focus will be temperature sensor readings. Key Responsibilities: - Setting up a reliable connection between Arduino UNO and SIM7600E - Implement AT+COMMAND for effective communication - Design a protocol for transmitting temperature sensor data Ideal Skills: - Solid knowledge of Arduino - Proficiency in handling SIM7600E - Experience in implementing AT+COMMAND - Understanding of sensor data transmissions. Please ensure you can efficiently deliver on these requirements, and provide the mentioned sensor data communication before placing your bid.

Tôi cần xây dựng một hệ thống giám sát dựa trên Arduino để theo dõi nhiệt độ, độ ẩm, cường độ ánh sáng và trạng thái mất điện. Khi bất kỳ thông số nào vượt ngưỡng hoặc khi mất nguồn, hệ thống phải gửi cảnh báo theo thời gian thực qua SMS; nếu anh/chị có thể bổ sung thêm thông báo trên ứng dụng di động thì càng tốt. Yêu cầu chính • Mạch Arduino hoàn chỉnh kèm sơ đồ nối dây, danh sách linh kiện và mã nguồn. • Cấu hình ngưỡng linh hoạt cho từng cảm biến, lưu trong mã hoặc qua giao diện cấu hình đơn giản. • Gửi SMS tự động (ưu tiên dùng SIM800L/SIM900 hoặ...

Instalador de alarmas comunitarias con 14 años de experiencia en Chile. Desarrollo una central de alarma comunitaria propia y busco ingeniero electrónico con experiencia en potencia y RF para validar el diseño antes de fabricar las placas armadas (PCBA) en China. EQUIPO: central en gabinete metálico sobre poste, a la intemperie. Se activa con control RF o llamada; hace sonar sirena, enciende baliza y envía SMS. Hasta 250 usuarios, 50 reciben SMS. Panel web para administrar usuarios. HARDWARE: - ESP32 - SIM7600 4G (llamadas y SMS) - Receptor E07-M1101D (CC1101) 433 MHz ASK/OOK, controles de código fijo EV1527/PT2262 - Driver discreto de sirena y 2 relés - Batería 12 V 7 Ah - Antenas fuera del gabinete con SMA pasa-muro REVISAR: 1. E...

Entwickler gesucht: Raspberry Pi 5 Dual-Display Car Dashboard Projektbeschreibung Ich suche einen erfahrenen Entwickler für ein modernes, selbst gebautes Fahrzeug-Dashboard auf Basis eines Raspberry Pi 5 mit zwei Displays. Ziel: Ein digitales Cockpit mit Tacho, Fahrzeugdaten, Infotainment und Steuerung ausgewählter Fahrzeugfunktionen. 1. Display 1 – Digitaler Tacho * Geschwindigkeit und Drehzahl * Tankfüllstand und Reichweite, sofern verfügbar * Motortemperatur und Batteriespannung * Warnleuchten und Fahrzeugstatus 2. Display 2 – Infotainment und Fahrzeugsteuerung * Übersichtliche Anzeige aller Sensorwerte * Reifendruck und Temperaturen * Beleuchtungs- und Kühlungsstatus * Touchscreen zur Bedienung ausgewählter Funktionen * Fahrzeugdiag...