Renesas Electronics Corporation

Smart Crutch Reference Design

Renesas’ smart crutch integrates a heating element to the handle LED lighting

Image of Renesas’ Winning Combination - Smart CrutchRenesas’ winning combination smart crutch provides auto alerts, such as GPS tracking, whether a user has fallen, heart rate, and more, via the NB-IoT module. The smart crutch integrates a heating element to the handle LED lighting. Additional features include IoT functions for auto-SOS, cloud/app monitoring, real-time positioning, track and monitoring, and other location-based services (LBS).

This reference design features a microcontroller (MCU), temperature/humidity sensor, light sensor, sensor module, and power products.

Features
  • RA4M1 32-bit MCU provides rich communication and a touch sensor
  • Features the ISL29035 light sensor, OB1203 sensor module, and HS3003 high precision temperature/humidity sensor
  • Includes a high-efficiency charger and low quiescent current (IQ) power
  • RA4M1 MCU
    • Arm® Cortex®-M4 with floating point unit (FPU) offers a segment LCD controller and CTSU built on a highly efficient low power process and is supported by an open and flexible ecosystem concept
    • Flexible software package (FSP) built-on FreeRTOS and is expandable to use other RTOS and middleware
  • ISL9205D Li-ion battery chargers
    • High-performance charger for single-cell Li-ion/polymer batteries, charge current from 50 mA to 900 mA
  • ISL91127 buck-boost regulators
    • High-efficiency buck-boost regulator can deliver at least 2 A continuous output current (VOUT = 3.3 V) over a battery voltage range of 2.5 V to 4.35 V.
  • ISL29035 light sensors
    • Integrated ambient and infrared light-to-digital converter with I2C (SMBus compatible) interface
  • OB1203 sensors
    • Multi-channel digital RGB/ambient light, proximity and photoplethysmography sensor
  • HS3003 sensors
    • Highly accurate fully calibrated relative humidity and temperature sensor

RA4M1 Microcontrollers

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
IC MCU 32BIT 256KB FLASH 48LFQFPR7FA4M1AB3CFL#AA0IC MCU 32BIT 256KB FLASH 48LFQFP6009 - Immediate$37.95View Details
IC MCU 32BIT 256KB FLASH 64LFQFPR7FA4M1AB3CFM#AA0IC MCU 32BIT 256KB FLASH 64LFQFP4538 - Immediate$45.85View Details
IC MCU 32BIT 256KB FLSH 100LFQFPR7FA4M1AB3CFP#AA0IC MCU 32BIT 256KB FLSH 100LFQFP496 - Immediate$49.06View Details

ISL9205D Li-ion Battery Chargers

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
IC BATT CHG LI-ION 1CELL 10DFNISL9205DIRZIC BATT CHG LI-ION 1CELL 10DFN535 - Immediate$16.96View Details
IC BATT CHG LI-ION 1CELL 10DFNISL9205DIRZ-TIC BATT CHG LI-ION 1CELL 10DFN0 - Immediate$8.44View Details

ISL91127 Buck-Boost Regulators

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
IC REG BUCK BOOST 2.1A 20WLCSPISL91127II2AZ-T7AIC REG BUCK BOOST 2.1A 20WLCSP25 - Immediate$19.10View Details
IC REG BUCK BOOST 2.1A 20WLCSPISL91127IIAZ-T7AIC REG BUCK BOOST 2.1A 20WLCSP1000 - Immediate
1250 - Factory Stock		$19.10View Details
IC REG BCK BST 3.3V 2.1A 20WLCSPISL91127IINZ-T7AIC REG BCK BST 3.3V 2.1A 20WLCSP485 - Immediate$19.10View Details
IC REG BUCK BST ADJ/1V 2A 20QFNISL91127IRAZ-T7AIC REG BUCK BST ADJ/1V 2A 20QFN12169 - Immediate$25.52View Details
IC REG BUCK BOOST 3.3V 2A 20QFNISL91127IRNZ-T7AIC REG BUCK BOOST 3.3V 2A 20QFN201 - Immediate$25.52View Details

ISL29035 Light Sensor

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
SENSOR OPT 550NM AMBIENT 6 WFDFNISL29035IROZ-T7SENSOR OPT 550NM AMBIENT 6 WFDFN0 - Immediate$6.45View Details

OB1203 Sensors

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
SENSOR - BIOMONITOR SENSOR I2COB1203SD-C4RSENSOR - BIOMONITOR SENSOR I2C0 - Immediate$31.69View Details
SENSOR - BIOMONITOR SENSOR I2COB1203SD-C4VSENSOR - BIOMONITOR SENSOR I2C0 - Immediate$16.37View Details

HS3003 Sensor

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
SENSOR HUMIDITY 90% RH SMDHS3003SENSOR HUMIDITY 90% RH SMD2838 - Immediate$28.40View Details
Published: 2020-09-09

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