ARUN KUMAR

Hardware Lead with 8 years experience in designing and developing hardware for multiple projects.

RS485 to Ethernet Converter Module

Smart pH and RTD Meter

Client: Elico Pvt. Ltd. 

Key Skills: Simulation · Circuit Design · PCB Design

Project Overview: Developed a Smart pH meter capable of measuring pH and temperature levels of medical solutions, with wireless data transmission via BLE.

Responsibilities & Contributions:

• Designed the hardware using NXP MCU featuring an integrated BLE radio.
• Implemented ADC interfaces for pH and RTD sensor data acquisition.
• Programmed BLE communication for real-time data transfer to mobile devices.
• Designed 4-layer schematic and PCB layout, ensuring compact and reliable signal integrity.
• Enabled operation via coin cell battery or 5V DC power input for portable use.

Client: Honeywell 

Key Skills: Circuit Design · PCB Design

Project Overview : Designed a sub-module of a fire panel that converts MODBUS (RS485 UART) to Ethernet communication for industrial monitoring systems.

Responsibilities & Contributions:

• Designed hardware using i.MX RT series processor.
• Integrated peripherals: RS485, Ethernet, isolated RS232, DDR3 SDRAM, QSPI Flash, digital inputs, and debug UART.
• Created 6-layer schematic and PCB layout optimized for high-speed communication.
• Ensured modular design for scalable integration in fire detection systems.

Instrument Cluster for Tractor

Client: Suprajit-VST 

Key Skills: Component Selection · Circuit Design · EMI/EMC Design · PCB Design

Project Overview:Developed a cost-effective single-layer tractor cluster to display key vehicle parameters such as RPM, fuel level, and alerts.

Responsibilities & Contributions:

• Designed system using Renesas RL78 MCU with CAN bus interface.
• Integrated stepper motors, segment LCD, tell-tale LEDs, and I2C EEPROM.
• Designed and validated single-layer PCB meeting IEC 61000 EMI/EMC standards.
• Optimized layout for low-cost manufacturing and field durability.

Two-Wheeler Cluster – Renesas AIC 2.1

Client: Renesas  

Key Skills: Component Selection · Circuit Design · PCB Design · Team Leadership

Project Overview:Developed a Renesas evaluation kit (EVK) for two-wheeler digital instrument clusters supporting advanced display and connectivity.

Responsibilities & Contributions:

• Designed using Renesas RH850 MCU with integrated CAN communication.
• Implemented peripherals: 7" TFT LVDS display, QSPI Flash, SDRAM, and I2C EEPROM.
• Designed 6-layer PCB ensuring high-speed signal performance.
• Led hardware development and collaborated with firmware engineers for system bring-up.
• Adapted the design with Nuvoton MCU for EVK demo variant.

IoT Gateway

Client: Cyient 

Key Skills: Schematic Design · PCB Design · Team Leadership

Project Overview:Developed an IoT gateway for acquiring sensor data via Ethernet and transmitting it to the cloud through LTE connectivity.

Responsibilities & Contributions:

• Designed system around NXP MCU with interfaces: RS485/RS232/RS422, Ethernet, LTE, BLE/Wi-Fi, SPI temperature sensor, and RTC.
• Created compact multi-layer PCB layout for reliable performance.
• Led hardware design, testing, and integration with cloud modules.

Paint Dispensing Machine

Client: Elitech 

Key Skills: Requirement Capturing · Schematic Design · PCB Design · Testing

Project Overview: Developed a paint dispensing control system managing precise motor operations based on sensor feedback.

Responsibilities & Contributions:

• Designed with STM32 MCU to control stepper and BLDC motors.
• Implemented sensor-based control for accurate paint flow.
• Designed schematics and PCB layout optimized for industrial reliability.
• Supported testing and calibration for production-ready deployment.

Smart Health Tag

Client: DyRe ID 

Key Skills: Circuit Design · Rigid-Flex PCB Design · Miniaturization · Low-Power Design · BLE Communication

Project Overview:Developed a compact Smart Health Tag (28 mm diameter, rigid-flex PCB) for activity tracking and motion monitoring, tailored for wearable and healthcare IoT applications.

Responsibilities & Contributions:

• Designed ultra-compact hardware using BLE-enabled MCU for wireless connectivity.
• Integrated motion sensors for step and movement tracking.
• Implemented low-power architecture supporting operation on a coin cell battery.
• Designed 28 mm rigid-flex PCB layout ensuring mechanical stability and signal reliability.
• Optimized antenna placement and signal integrity for consistent BLE performance.
• Collaborated with firmware team for sensor calibration and data validation.

Street Fresco Payment Device

Client: Axicom  

Key Skills: Circuit Design · PCB Design · Power Management · Wireless Communication · Audio Systems

Project Overview:Developed a smart order notification device similar to the Swiggy or Zomato order alert system, designed for restaurants and vendors to receive and announce incoming orders through audio prompts and LED indicators.

Responsibilities & Contributions:

• Designed hardware around a Wi-Fi/BLE-enabled MCU for real-time cloud connectivity and order updates.
• Developed audio playback circuitry with integrated amplifier and speaker for voice notifications.
• Incorporated LED indicators and control interface for instant visual feedback.
• Designed Li-ion battery–powered system with USB charging and efficient power management.
• Created 4-layer PCB layout ensuring compact size, thermal stability, and EMI/EMC compliance.
• Collaborated with the firmware team to validate wireless communication, sound alerts, and system reliability.